Studio Technologies 5401A Operation & User’s Manual

Copyright © 2021 by Studio Technologies, Inc., all rights reserved studio-tech.com User Guide Issue 2, July 2021 This User Guide is applicable for serial numbers M5401A-01001 and later with Main MCU Firmware 1.04 and later Model 5401A Dante® Leader Clock

Issue 2, July 2021 Studio Technologies, Inc. Page 3 Table of Contents Revision History ................................................................................................................. 4 Introduction ......................................................................................................................... 5 Installation .......................................................................................................................... 9 Dante Configuration ........................................................................................................... 12 Model 5401A Configuration ................................................................................................ 15 Operation ............................................................................................................................ 29 Technical Notes .................................................................................................................. 40 Specifications ..................................................................................................................... 45 Appendix A–Compatible Sync Input Sources ..................................................................... 47 Appendix B–Network Configuration Examples ................................................................... 48 Appendix C–Dante Controller Network Default Configuration Values ................................ 51 Appendix D–Menu Structure .............................................................................................. 52 Appendix E–Screen Captures ............................................................................................ 53 Appendix F–Model 5401A Default Configuration Values .................................................... 58 Appendix G–PTPv2 (IEEE® 1588-2008) Default Characteristics ...................................... 59 Appendix H–Accessing the Unit when User Name and/or Password are Not Known ....... 60

Model 5401A User Guide Page 4 Studio Technologies, Inc. Revision History Issue 2, July 2021: • Documents support for 176.4 and 192 kHz sample rates. • Miscellaneous corrections and clarifications. Issue 1, May 2021: • Initial release.

Issue 2, July 2021 Studio Technologies, Inc. Page 5 Introduction The Model 5401A Dante Leader Clock pro- vides precise timing signals for applications that utilize the Dante audio-over-IP media networking technology. The unit implements a high-performance IEEE® 1588 precision time protocol (PTP) server, compatible with the requirements of Dante and capable of simultaneously supporting the timing needs of up to hundreds of Dante-compatible devices. As expected, the Model 5401A provides the PTPv1 (IEEE 1588-2002) compatibility that’s required by Dante. In addition, the unit supports PTPv2 (IEEE 1588-2008) for AES67 applications. A word clock output provides a general-purpose timing reference for use by external devic- es. The Model 5401A also generates eight sine wave audio tones on Dante transmit- ter (output) channels which can be useful during audio and data network installation, maintenance, and operation. A sync input connection allows the Model 5401A’s in- ternal oscillator to be synchronized with a variety of timing and reference signals. The Model 5401A is suitable for use in fixed and mobile broadcast facilities, post-pro- duction studios, commercial and education- al theater environments, and entertainment applications. Only power and one, two, or three Ethernet network connections are required for full operation. Using Dante’s inherent capabilities two Model 5401A units can serve in primary and backup Leader clock roles for redundant operation. The unit’s three Gigabit Ethernet (GigE) network interfaces can be configured for use in a range of network implementations. For high-reliability audio applications two of the interfaces can support Dante redun- dancy operation while the third is used for accessing the management webpages. To meet the latest interoperability standard the Model 5401A’s Dante implementation sup- ports AES67-2018. The unit also integrates with the Dante Domain Manager™ (DDM) software application. An integrated web server allows fast and flexible monitoring and configuration of the unit’s networking, clocking, and Dante performance. Front-panel LED indicators, an LCD display, and pushbutton switches provide users with direct access to key operating parameters. The Model 5401A can be powered by 100- 240 V, 50/60 Hz mains or a source of 12 volts DC. Both can be simultaneously con- nected to provide redundant operation. The lightweight enclosure mounts in one space (1U) of a 19-inch equipment rack. Industry- standard connectors are used for Ethernet, DC power, and AC mains interconnections. Updating the Model 5401A’s operating software can be easily performed using a standard USB flash drive. Figure 1. Model 5401A Dante Leader Clock front and back views

Model 5401A User Guide Page 6 Studio Technologies, Inc. Applications Applications for the Model 5401A include broadcast and post-production facilities, college and university audio networks, are- nas, stadiums, corporate installations, and virtually any application where substantial numbers of Dante-compatible devices are utilized. The Model 5401A will serve as a stable and consistent Leader clock for the entire Dante “network.” And, as expected, the Model 5401A is compatible with all Dante devices, no matter what their function or manufacturer. Applications that utilize devices compatible with AES67 will also benefit from the Model 5401A’s resources. Why a Dedicated Dante Leader Clock? With Dante ubiquitous in fixed and mobile facilities of all sizes and types, the need arose for a cost-effective, purpose- designed, dedicated Leader clock. While an inherent strength of Dante networking is its carefully implemented use of the IEEE 1588 standard to ensure that all connected devices maintain a common timing refer- ence, the actual performance can vary widely depending on the specific Dante devices in use and the overall number of devices on a network. There are many Dante-compatible devices that can provide adequate basic performance as a Leader clock, but with the Model 5401A networked audio systems get the benefits of a high- performance Primary Leader Clock, along with additional unique capabilities. The unit’s feature set, along with the associ- ated internal hardware and software, was designed to provide optimum performance, flexibility, and system integrity. Timing Sources The Model 5401A can provide excellent Leader clock performance using its tem- perature- stabilized internal oscillator, which exceeds the capability of standard Dante devices by at least an order of magnitude. While its standalone performance is excel- lent, the Model 5401A can also be “locked” to a variety of external signals for integra- tion into facilities that include a central or main timing reference. Compatible signals include word clock, video reference, and 10 MHz. Word clock is a square wave signal that is often used as a timing reference in audio- only facilities. Several common word clock rates, including 48, 96 kHz, and the more- exotic 192 kHz, are compatible with the Model 5401A’s sync input. Video reference (“sync”) signals are found in most broadcast and post-production facilities. The Model 5401A supports the most-common video format/rate combinations including “black burst,” bi- and tri-level HD, and several that are specifically intended for 4K applications. Industrial and commercial facilities often uti- lize a GPS-disciplined source of 10 MHz as a timing reference. This sine wave signal is typically compatible with the Model 5401A’s sync input. Word Clock Output The Model 5401A generates a precise word clock output signal that can be used as a timing reference for related equipment. It’s specifically intended for “locking” digital audio devices in applications that use the Model 5401A to provide timing reference signals for the associated Dante equipment. In this way, all devices in an installation will share a common timing reference. The word clock output rate can be 44.1, 48, 88.2, 96, 176.4, or 192 kHz. The underlying timing source for the word clock output is derived from the Model 5401A’s main timing source. As previously reviewed, the internal oscillator, if desired, can be “locked” to an external source. The main timing source is divided and processed by the Model

Issue 2, July 2021 Studio Technologies, Inc. Page 7 5401A’s logic circuitry to create the highly stable word clock output. This ensures that the word clock output is synchronized with the unit’s PTPv1 and PTPv2 server func- tionality. Audio Tone Generator The Model 5401A generates eight sine wave audio tones intended for general-pur- pose use. These audio tones are available from the Model 5401A by way of Dante transmitter (output) channels and can be connected, using the Dante Controller ap- plication, to Dante receivers (inputs) on related equipment. The flexibility of being able to interconnect signals (create Dante “subscriptions”) between all Dante devices on a network allows the audio tones to be used for a variety of purposes. Configura- tion choices allow the frequency and level of each sine wave tone to be optimized for use in specific applications. Leader Clock Support for Dante Networks A core part of the technology underlying Dante audio-over-IP networking ensures that all connected devices follow a com- mon timing reference. This is accomplished using the PTPv1 (IEEE 1588-2002) and PTPv2 (IEEE 1588-2008) precision time protocols. Any connected Dante device can be used as a Leader clock; there is no requirement that a dedicated Leader clock device be utilized to realize adequate func- tionality. However, the actual performance can vary widely depending on the specific Dante devices available and the overall number of Dante devices on a network. Many Dante devices utilize the 2- or 4- channel Ultimo™ ULT or UXT integrated circuits to implement Dante connectiv- ity. While Ultimo devices will fully support Dante audio transport, they are not well suited to serve as a Leader clock. Ultimo’s PTP performance is limited and does not have the ability to synchronize with an external timing reference. Other Dante devices may use the Brooklyn II module or Broadway integrated circuit to support Dante connectivity. In some cases, these devices can provide good basic perfor- mance as a Leader clock. However, problems and limitations may arise when these devices are called upon to perform “double duty,” serving in both a primary function (such as analog-to-Dante interfacing or audio signal processing) as well as acting as a Leader clock. This is un- derstandable as the main purpose of these devices is to serve functions other than act- ing as a primary synchronization reference. Timing related features, such as allowing connection of a video bi- or tri-level sync signal is rarely, if ever, supported. And PTP performance can degrade when the com- puting power of a device is intended pri- marily for handling and manipulating digital audio signals. This can lead to the required PTP resources being in short supply when the number of Dante devices that need timing messages moves into the hundreds. Also, firmware updates, cabling changes, and other maintenance tasks typically asso- ciated with a general-purpose Dante device would impact the Leader clock functionality for an entire installation. The Model 5401A was specifically designed to support a Dante-based audio system’s Leader clock requirement. And the unit’s generation of audio tones and implementa- tion of the word clock output utilize hard- ware circuitry that is separate from that associated with its PTP functionality. As such, this secondary functionality will not interfere with PTP operation. Unlike a general-purpose Dante device, once mount- ed in an equipment rack and the required

Model 5401A User Guide Page 8 Studio Technologies, Inc. interconnections are made, the Model 5401A will perform its tasks without risk of interruption due to conflicting resource demands. Flexible Networking Capability Using the Dante Controller application program, the Model 5401A’s three Eth- ernet ports can be selected to operate in one of four modes: Switched, Redundant, Switched+Mgmt, and Redundant+Mgmt. This should allow virtually any desired networking implementation to be easily achieved. By using the Switched or Redundant net- work modes, separate network connections will be maintained for Dante audio and management purposes. In the Switched mode a single Ethernet connection to either of the Model 5401A’s two Dante Ethernet ports will provide Dante Leader clock functionality. The remain- ing Dante Ethernet port will provide Dante network “loop-through” capability and can be used to interface with another piece of Ethernet-connected equipment. The management Ethernet port will be used to access the Model 5401A’s monitoring and configuration webpages. In the Redundant mode two independent Ethernet connections are made to the Model 5401A’s two Dante Ethernet ports, enabling Dante’s redundant networking capability. Again, the management Ether- net port will be used to access the Model 5401A’s monitoring and configuration webpages. In the Switched+Mgmt mode a single Ether- net connection is used for both Dante Lead- er clock functionality as well as providing access to the Model 5401A’s management webpages. The remaining Dante Ethernet port will provide network “loop-through” capability and can be used to interface with another piece of Ethernet-connected equipment. In the Redundant+Mgmt mode two inde- pendent Ethernet connections can be made to the Model 5401A’s two Dante Ethernet ports. This will enable Leader clock ca- pability for applications that utilize Dante redundancy. Access to the Model 5401A’s management webpages will be made by way of the Ethernet connection made to the Dante primary Ethernet port. Operating Power The Model 5401A allows an AC mains source of 100-240 V, 50/60 Hz to be directly connected. It can also be DC powered us- ing a 10-18 volt source that is connected via a broadcast-standard 4-pin XLR connector. If both AC and DC power sources are con- nected the unit will be powered by the AC mains supply. Only if the AC mains source fails will appreciable power be drawn from the DC source. This allows a source of DC, typically an external power supply, to serve in a backup capacity. With this arrangement normal operation can continue even if AC mains power is lost. Future Capabilities The Model 5401A was designed so that its capabilities can be enhanced in the future. A USB receptacle located on the unit’s back panel, allows the three firmware files (embedded software) to be updated us- ing a USB flash drive. The Model 5401A’s Dante firmware can be updated using one of the unit’s Ethernet connections, helping to ensure that the Dante capabilities remain up to date. All software files and configura- tion parameters are stored in non-volatile memory.

Issue 2, July 2021 Studio Technologies, Inc. Page 9 Installation In this section the Model 5401A will be mounted in one space (1U) of an equipment rack. In many cases, an external synchroni- zation source will be connected to the sync input BNC jack. If needed, a connection may be made to the word clock output BNC jack on the back panel. One or more Ethernet data connections will be made. AC mains and/or DC power will be connected to the Model 5401A. Using a coaxial cable terminated with a BNC plug, an external source of synchronization may be connected to the sync input. A word clock output is provided by way of a BNC jack and may be utilized by one or more pieces of equipment. Up to three Ethernet data connections will be made to the Model 5401A using standard RJ45 patch cables. AC mains power can be connected to the Model 5401A by means of a detachable cord that is compatible with the unit’s 3-pin IEC 320 C14 inlet connector. Some applications may warrant connection to a source of nomi- nal 12 volts DC which can be made by way of a 4-pin XLR connector. A DC source can be used to power the Model 5401A as well as serving as a backup power source should AC mains not be present. What’s Included The shipping carton contains a Model 5401A Dante Leader Clock and instructions on how to obtain an electronic copy of this guide. Also included in the shipping carton is a North-American-standard AC mains cord. For destinations outside of North America the local reseller or distributor should pro- vide an appropriate AC mains cord. Mounting the Model 5401A The Model 5401A Dante Leader Clock re- quires one space (1U) in a standard 19-inch (48.3 cm) equipment rack. Secure the unit into the designated equipment rack using two mounting screws per side. As the Mod- el 5401A does not contain a fan or other noise-producing source it can be located within a room or other structure where au- dio monitoring is going to take place. Some or all of the connections involving the sync input BNC jack, the word clock output BNC jack, the Ethernet interface RJ45 jacks, and the AC mains and/or DC power connectors may be utilized. Twisted-pair (UTC) Ethernet has a 100- meter (325-foot) interconnection cable limi- tation. But that can be overcome by using fiber-optic interconnections between the Model 5401A and the Ethernet switch or switches in the one or more associated local-area-networks (LANs). Sync Input An external synchronization source can be connected to the Model 5401A’s sync input BNC jack. Located on the back panel, this input allows the Model 5401A’s internal tim- ing to be “locked” to an external reference. Signals that are compatible with the Model 5401A’s sync input include word clock, bi- level video, tri-level video, and 10 MHz sine wave. A configuration setting in the Sync Input webpage defines what type of signal is going to be connected. Another setting defines if a termination impedance is ap- plied to the sync input. Refer to the Specifi- cations section of this guide for the general characteristics required of acceptable exter- nal sync signals. A connected word clock signal must be a square wave with a rate that matches the Dante sample rate as defined in the Dante Controller application. The rate can be 44.1, 48, 88.2, 96, 176.4, or 192 kHz. If termina- tion has been enabled for the sync input when it has been configured for word clock an impedance of 75 ohms will be applied.

Model 5401A User Guide Page 10 Studio Technologies, Inc. A source of bi-level or tri-level video can also be connected to the sync input. Circuit- ry within the Model 5401A will decode many of the common video rates and formats, al- lowing them to serve as a timing reference. Refer to Appendix A, located at the end of this guide, for a list of compatible rates and formats. If the sync input is configured for video and termination has been enabled an impedance of 75 ohms will be applied. A source of 10 MHz sine wave can be con- nected to the Model 5401A’s sync input. This type of signal is commonly used as a timing reference in industrial and instru- mentation applications. An impedance of 50 ohms will be applied to the sync input if ter- mination has been enabled and the source is selected for 10 MHz. Word Clock Output A word clock output signal is provided for use by other devices that want to be “timed” from the Model 5401A. Available by way of a BNC jack located on the back panel, the square wave output has a frequency that matches the unit’s configured Dante sample rate. Choices are 44.1, 48, 88.2, 96, 176.4, and 192 kHz. The exact frequency of the word clock output is based on the timing reference that has been selected for the Model 5401A. If, for example, the Sync Input was selected as the unit’s timing refer- ence, then the word clock output would be “locked” to it. The source impedance of the word clock signal is 75 ohms and its unterminated output level is 5 volts peak-to-peak (Vpp). When externally terminated with a 75 ohm load the word clock output level will drop to 2.5 Vpp. Ethernet Connections The Model 5401A provides three Giga- bit Ethernet (GigE) ports for flexibility and compatibility with many networking imple- mentations. Two ports are provided for interconnections with one or two local area networks (LANs) associated with Dante audio-over-IP networking schemes. They are labeled as PRI (primary) and SEC (sec- ondary). The third Ethernet port, labeled MGMT, can be used to access the Model 5401A management resources. An internal web server function supports the Model 5401A’s management port’s webpages. These webpages are used for configura- tion, monitoring, and maintenance of Model 5401A operation. Refer to Figure 2 for an overview of the Model 5401A’s three Ether- net ports and how they can operate. Using the Dante Controller application, the three Ethernet ports can be config- ured to operate in one of four modes: Switched, Redundant, Switched+Mgmt, or Redundant+Mgmt. If configured for either the Switched or Redundant modes the management webpages are accessed by way of the management Ethernet port. When configured for the Switched+Mgmt mode the management webpages are accessed by way of either the primary or secondary Ethernet ports. When configured for the Redundant+Mgmt mode the man- agement webpages are accessed using an Ethernet connection made to the primary Ethernet port. By providing three Ethernet ports and four configuration modes, the Model 5401A al- lows support for virtually all facilities, includ- ing those that utilize separate networks for Dante audio transport and equipment man- agement. In this way, “production” networks that support transport of audio signals by way of a single LAN (Switched mode) or two LANs (Redundant mode) can be sepa- rate from an engineering network that is used by technical personnel for configuring and maintaining a facility or “plant.”

Issue 2, July 2021 Studio Technologies, Inc. Page 11 Connections to the three Ethernet interfac- es are made by way of standard RJ45 jacks that are located on the back of the Model 5401A’s enclosure. The Ethernet interfaces support auto MDI/MDI-X so that crossover cables are not required. Refer to Appen- dix B, located at the end of this guide, for examples of how the Model 5401A’s three Ethernet interfaces might be utilized. It’s dif- ficult to conceive of a network environment that the unit wouldn’t be able to effectively support. Dante Port Connections At least one 1000BASE-T (GigE) Ethernet connection is required for Model 5401A Dante operation. It should be connected to the primary RJ45 jack. A second 1000BASE-T (GigE) connection can be made to the secondary RJ45 jack if Redun- dant Dante is desired. For this functional- ity to be active the Model 5401A’s network configuration must be set for the Redun- dant or Redundant+Mgmt mode within the Dante Controller software application. While technically 100BASE-TX (100 Mb/s) Ether- net can also be used for these Dante con- nections, it is not optimal. Additionally, it’s important to note that 10BASE-T (10 Mb/s) Ethernet connections are not sufficient. When configured in Dante Controller for the Switched or Switched+Mgmt modes the Model 5401A’s Dante secondary Ethernet connection can also be used as a “loop through” port such as would be provided by an Ethernet switch. Switched mode is the default setting but using the Dante second- ary port in this manner for applications other than troubleshooting or “looping” to access the Model 5401A’s management port is not recommended. It will function reliably but “daisy chaining” Ethernet signals can limit flexibility and present a failure point; it’s optimal if each Dante Ethernet interface connects directly to a separate port on an Ethernet switch. Management Port Connection If required by the needs of an application, the management webpages can be ac- cessed using an Ethernet signal connected to the Model 5401A’s management Ethernet port. This requires that the network mode in Dante Controller be configured for Switched or Redundant. It’s recommended that a 1000BASE-T (GigE) connection be made but a 100BASE-TX (100 Mb/s) connection is sufficient. (GigE will provide the best per- formance and it’s assumed that all contem- porary applications will support it.) Access to the Model 5401A’s management webpages can also be obtained using the same network connection or connections that are being used for Dante audio. This requires that the network mode in Dante Controller be configured for Switched+Mgmt or Redundant+Mgmt. Appendix B provides example of how these network scenarios can easily be implemented. Dante Controller Network Model 5401A Ethernet Port Switch Configuration Pri Sec Mgmt Switched Dante Management Redundant Dante Primary Dante Secondary Management Switched+Mgmt Dante and Management Disabled Redundant+Mgmt Dante Primary and Management Dante Secondary Disabled Figure 2. Model 5401A Ethernet Port Configuration and Operation

Model 5401A User Guide Page 12 Studio Technologies, Inc. Connecting Power The Model 5401A requires a source of AC mains or nominal 12 volts DC for operation. Either source can be connected with the same result. Both can also be simultane- ously connected if a redundant (backup) power scheme is desired. Connecting AC Mains Power The Model 5401A can operate directly from AC mains power of 100 to 240 volts, 50/60 Hz, 5 watts maximum. As a “universal mains input” device there are no switches to set or jumpers to install. A 3-pin IEC 320 C14 inlet connector on the back panel mates with a detachable mains cord set. All units are supplied from the factory with an AC mains cord that has a North- American (NEMA 5-15L) standard plug on one end and an IEC 320 C13 connector on the other end. Units intended for use in other destinations require that an appropri- ate mains cord be obtained. The wire colors in the mains cord should conform to the internationally recognized color code and be terminated accordingly: Connection Wire Color Neutral (N) Light Blue Line (L) Brown Earth/Ground (E) Green/Yellow Because the Model 5401A does not contain a power on/off switch it will begin operation as soon as AC mains power is connected. Safety Warning: The Model 5401A does not contain an AC mains disconnect switch. As such, the AC mains cord plug serves as the disconnection device. Safety considerations require that the plug and associated inlet be easily ac- cessible to allow rapid disconnection of AC mains power should it prove necessary. Connecting DC Power The Model 5401A can also operate from a source of 10 to 18 volts DC. The current required from a 12 volts DC source is 0.5 ampere (500 milliamperes) maximum. A 4-pin male XLR connector, located on the unit’s back panel, is used to connect the source of DC. Prepare a mating connec- tor (female) so that pin 1 is DC– and pin 4 is DC+. Pins 2 and 3 are not used and should remain unconnected. This connector type and pinout have become a broadcast DC power standard and should be familiar to many technical personnel. Because the Model 5401A contains no power on/off switch it will begin operation as soon as a DC power source is connected. As previously mentioned, both an AC mains source and a DC source can be connected at the same time. If this is the implementation then the AC mains source will always power the Model 5401A with the DC source serving as a “hot standby.” Only if the AC source fails will the unit draw power from the DC source. This will occur automatically with no interrup- tion of Model 5401A operation. In this “standby” mode (when an AC mains source is connected) the Model 5401A draws less than 110 microamperes (uA) from a 12 volts DC input. Dante Configuration For audio and timing to correctly pass from the Model 5401A requires that several Dante- related parameters be configured. These configuration settings are stored in non- volatile memory within the Model 5401A’s Dante network interface circuitry. Configu- ration will typically be done with the Dante Controller software application, available for download free of charge at audinate.com. Refer to Appendix C of the list of the Model 5401A’s Dante Controller default configura- tion. Versions of Dante Controller are avail- able to support several operating systems.

Issue 2, July 2021 Studio Technologies, Inc. Page 13 The Model 5401A’s Dante interface is com- patible with the Dante Domain Manager (DDM) software application. Refer to DDM documentation, also available from Audi- nate, for details on which Model 5401A and related parameters may have to be configured. Audio Routing The Model 5401A’s eight Dante transmitter (output) channels can be assigned to the desired Dante receiver (input) channels on associated equipment. This will route the eight channels associated with the tone generator function. Within Dante Controller a “subscription” is the term used for routing a transmitter flow (a group of up to four out- put channels) to a receiver flow (a group of up to four input channels). The Model 5401A uses a Brooklyn II mod- ule to implement its Dante functionality. The number of transmitter flows associated with this module is 32 and, as such, typically no flow limitation should occur. These flows can either be unicast, multicast, or a combi- nation of the two. Note, however, that when AES67 mode is enabled in Dante Controller the Dante transmitter (output) channels will only function in multicast; unicast is not supported. Unit and Channel Names The Model 5401A has a default Dante device name of ST-5401A- along with a unique suffix. The suffix identifies the spe- cific Model 5401A that is being configured. The suffix’s actual alpha and/or numeric characters relate to the MAC address of the unit’s Brooklyn II module. The eight Dante transmitter (output) channels associated with the tone outputs have default names of Tone 1 through Tone 8. Using Dante Controller, the device and channel names can be revised as appropriate for a specific application. Device Configuration The Model 5401A supports audio sample rates of 44.1, 48, 88.2, 96, 176.4, and 192 kHz with no pull-up/down options available. The digital audio data is in the form of 24-bit pulse-code modulation (PCM 24) samples. Clocking- and latency-related parameters can be adjusted if required in Dante Control- ler but the default values are typically correct. Network Configuration – Dante As has been covered previously in this guide, the Model 5401A allows connection of one, two, or three Ethernet signals using standard RJ45 jacks which are located on the back panel. In many applications, two of the jacks will be used for Dante audio and the third for connecting to a network designated for device management purposes. It’s also pos- sible to access the Model 5401A’s manage- ment webpages using the Dante Ethernet ports. The Model 5401A’s Dante ports are labeled PRI and SEC indicating that they are typically used for the primary and secondary connections. The third Ethernet port is la- beled MGMT, indicating that it is intended for use accessing the management webpages. How these three Ethernet ports function can be selected in the Network Config – Switch Configuration section of Dante Control- ler. The choices are Switched, Redundant, Switched+Mgmt, and Redundant+Mgmt. If Switched is selected then the Model 5401A can establish one Dante audio connection with an Ethernet network. It doesn’t matter which RJ45 jack is utilized, although for clar- ity this would typically be the primary jack. The secondary RJ45 jack can be used to interconnect with another piece of networked equipment. The management Ethernet port will be used to access the management webpages.

Model 5401A User Guide Page 14 Studio Technologies, Inc. If the Model 5401A’s Dante network is con- figured for Switched ensure that only one of the two Dante RJ45 jacks on the back panel is connected to the LAN associated with the Dante network. If both of the Model 5401A’s Dante RJ45 jacks are routed to ports on the same LAN this will typically “crash” the network! (Although some of the latest/most-advanced Ethernet switches will automatically detect and prevent such a “network bridging” issue from occurring.) If Switched+Mgmt is selected the same issues as discussed in the previous two paragraphs would again apply. The only difference is that the management web- pages would be accessed using the same Dante Ethernet port that is being used to access the Dante network. The manage- ment Ethernet port will be disabled. If Redundant is selected then Dante’s Redundant networking capability will be enabled. In this case, separate Ethernet LAN connections should be made to the Dante primary and Dante secondary RJ45 jacks. Again, the Model 5401A’s separate management Ethernet port will be used to access the management webpages. If Redundant+Mgmt is selected in Dante Controller then the network connection made to the Dante primary Ethernet port will also be used to access the manage- ment web-pages. The Model 5401A’s sepa- rate management port will be disabled. IP Addresses When a Model 5401A has been configured for either the Switched or Switched+Mgmt network mode a single Dante IP address will be associated with the network connec- tion that is made to either the Dante primary or the Dante secondary RJ45 jack. If the network configuration has been selected for Redundant or Redundant+Mgmt then separate IP addresses and related network parameters will be assigned to the Dante primary and Dante secondary Ethernet ports. No matter what network mode has been selected the Model 5401A will always have a separate management IP address. Typically, the Model 5401A’s Dante IP address or addresses and related network parameters will be determined automati- cally using DHCP or, if that’s not available, the link-local network protocol. If desired, the Dante Controller application does allow Dante IP addresses and related network parameters to be manually set to a fixed (static) configuration. While this is a more- involved process than simply letting DHCP or link-local “do their thing,” if fixed address- ing is necessary then this capability is available. Note that if the Model 5401A’s network configuration has been set for Redundant or Redundant+Mgmt then the Dante prima- ry and Dante secondary IP addresses and related parameters can be independently configured. This allows both Dante inter- faces to be configured automatically, both interfaces to be configured manually, or one interface to be configured automatically and the other to be configured manually. By default, the Model 5401A’s management IP address and related network parameters will be determined automatically using DHCP or link-local. A configuration option, accessible using the front-panel display and associated buttons or the management webpages, allows manual control of the management IP address, subnet mask, and gateway address values. AES67 Configuration – AES67 Mode Dante Controller allows a Model 5401A to be configured for AES67 operation. This requires the AES67 mode to be set for Enabled. As previously noted in this guide,

Issue 2, July 2021 Studio Technologies, Inc. Page 15 if AES67 mode is enabled then PTPv2 will be utilized and the Dante transmitter (out- put) channels will use multicast. The sam- ple rate will be fixed at 48 kHz. Preferred Clock Source By the very nature of its intended applica- tion, the Model 5401A will normally serve as the Leader Clock for all Dante-enabled devices. The unit has the ability to com- municate with the Dante network, selecting itself as the Preferred Leader and causing the Enabled Sync to External function to be enabled. The status of these two pa- rameters can be observed using the Clock Status function in Dante Controller. Settings accessible using the Model 5401A’s management webpages allow ex- tensive changes to the clock configuration. These are provided for use when trouble- shooting or addressing special applications. In most cases, the Model 5401A’s default settings would be appropriate and should be utilized. Model 5401A Configuration Many Model 5401A Dante Leader Clock operating parameters can be configured using the management system’s webpages that are provided by way of one of the unit’s Ethernet ports. The specific port utilized for management will depend on the network configuration that is selected using the Dante Controller application. A standard web browser is all that is required to utilize the menu webpages. Several key network configuration param- eters can also be viewed and revised using the Model 5401A’s front-panel graphics dis- play and associated pushbutton switches. Refer to Appendix D for details on which parameters can be revised in this manner. Management IP Address It’s easy to identify the Model 5401A’s man- agement IP address by way of the front- panel display. If the screen saver function is active, as it will be in most situations, one of the five pages that will automatically display will show the current management IP address. As such, a user can simply observe the sequencing menu pages and watch for the one that displays the cur- rent management IP address. If it’s desired that the current management IP address be continuously displayed then the Enter pushbutton switch on the front panel should be pressed. This will stop the screen saver function and cause the current manage- ment IP address to display. It will also allow the various menu pages to be accessed using the up, down, left, and right pushbut- ton switches. Simultaneously pressing the left and right arrow buttons will cause the screen saver mode to begin again. The screen saver mode will also automatically start two minutes after the last press of any of the front-panel pushbutton switches. How the management Ethernet port obtains its IP address will depend on the manage- ment interface configuration setting. The default method is automatic so the Model 5401A’s management port will first try to obtain an IP address using DHCP. If that is not successful an IP address will be assigned using the link-local protocol. An address of 169.254.x.x will indicate that an IPv4 address was established using link-lo- cal. The Model 5401A may also have been configured to use a manual (fixed or static) IP address. The front-panel display and as- sociated pushbuttons, or the Model 5401A’s management webpages, can be used to re- view and/or make changes to the manage- ment IP address and related parameters.

Model 5401A User Guide Page 16 Studio Technologies, Inc. Accessing the Management Webpages To access the Model 5401A’s home web- page, type the unit’s management IP ad- dress into a browser’s search bar. (It’s possible that some browsers may require including the text http:// followed by the IP address.) Of course, the computer associ- ated with the browser must be on the same LAN and subnet as the Model 5401A. Home Menu Once the Model 5401A menu system has been accessed the Home webpage will ap- pear. It provides six display-only fields along with a link to the Login menu webpage. The fields are similar to those provided in the Main menu configuration webpage. The current clock source field will display which timing source is actively being utilized by the Model 5401A. The Sync Input status field displays the current operating condi- tion of the sync input whose BNC jack is located on the unit’s back panel. The four Dante sync status fields will display the role that the Model 5401A is actively playing as PTPv1 and PTPv2 timing resources for the devices connected to the associated net- work or networks. Details about these fields are provided in the Main menu paragraphs found later in this section. Login Menu From the Home webpage click on the Login tab to access the Login webpage. Entry of a valid user name and password is required to access the additional configuration menus. The Model 5401A doesn’t incorpo- rate a sophisticated security implementa- tion. The User name and password, as well as the underlying software, is intended to keep “honest” people from making unau- thorized changes to the configuration of the Model 5401A. It is not intended as a sophis- ticated, rigorous security system. Should the applicable user name and/or password be misplaced, refer to the Techni- cal Notes section and/or Appendix H of this guide for a recovery method. User Name: Enter the Model 5401A’s user name into this field. It is case sensitive. The default user name is guest. If both the default user name and the default password are active then the user name will display in this field. Password: Enter the Model 5401A’s pass- word into this field. It is case sensitive. The default password is guest. If both the default user name and the default password are active then the password will display in this field. Log In Button: Click on the Log In button to submit the entered user name and pass- word. If the correct entries have been made the Main menu webpage will display. If an incorrect user name and/or password is entered then a login failed message will be displayed. Main Menu Once the correct user name and password have been submitted the Main menu web- page will be displayed. This menu provides the ability to select three important operating parameters as well as displaying seven key real-time conditions. In addition, the menu system allows direct access to other menu webpages. Refer to Appendix E for a view of the Main menu. Main Clock Source: This is a configurable field with three choices: Internal, Sync Input, and Dante. This setting determines which source will be the main (normal) timing source that is used by the Model 5401A’s circuitry as its own “Leader” timing reference. This is the clock source that will be used by the Model 5401A’s PTPv1 and PTPv2 servers that

Issue 2, July 2021 Studio Technologies, Inc. Page 17 are critical to the Model 5401A’s support of related Dante devices. When Internal is selected the Model 5401A’s temperature-sta- bilized, high-performance crystal oscillator is utilized. This will provide excellent timing accuracy and consistent long-term perfor- mance. This source is far superior to that provided by other standard Dante devices. This is the correct choice if a high-quality reference signal is not going to be connected to the sync input. When Sync Input is selected the Model 5401A’s sync input function will be utilized. Using a BNC jack, located on the Model 5401A’s back panel, an external source of word clock, video reference, or 10 MHz sine wave can be connected. Circuitry within the Model 5401A will “lock” (synchronize) the internal timing signals to the externally pro- vided reference signal. Selecting Dante will instruct the Model 5401A to use the clock signal provided by its Dante interface circuitry as its reference timing source. The Dante interface circuitry will either use its internal crystal oscillator or synchronize to another Dante device on the associated network. The actual clock source used by the Model 5401A’s Dante interface will depend on a setting in the Dante Con- troller application. The Model 5401A includes the choice of Dante as the main clock source only for trou- ble-shooting or other factory-directed activi- ties. It’s not expected that this selection will ever be used during normal Model 5401A operation. By selecting Dante the excellent timing performance that can be provided by the sync input or the internal oscillator would not be utilized. Failover Clock Source: This is a configu- rable field with two choices: Internal and Dante. This configuration choice selects which tim- ing source will be used should the Model 5401A’s selected main clock source be- come unavailable. Specifically, the failover source will be used if a valid sync source is not connected to the sync input. If Internal is selected then the unit’s crystal oscillator will be utilized as the Leader clock source should a valid sync input signal be unavail- able. If Dante is selected then the failover source will be the timing signal derived from the Model 5401A’s Dante interface. From a performance standpoint it’s prefer- able to select Internal. This ensures that the best clock performance can be obtained should the failover condition be active. However, selecting Dante would allow an interesting, albeit obscure, alerting feature to become active. In the Dante Controller ap- plication, a device such as the Model 5401A that has been selected as the Preferred Leader with an external source allowed will have an error condition occur if the Model 5401A’s Dante interface doesn’t detect an external reference being applied. And los- ing the external reference is what the Model 5401A’s circuitry will do should failover be activated and Dante selected as the failover source. In this way, a Dante network user could be alerted to a clocking issue should the Model 5401A lose its sync input source. However, having an error condition reported in the Dante Controller application is prob- ably not terribly important. The Dante SYNC LED, located on the Model 5401A’s front panel, will also offer a clear indication of a loss of an external sync input signal. This LED will typically slowly flash green when the Model 5401A is functioning correctly as the Leader clock for the Dante network. However, should the unit be configured to use an external sync input signal and a valid one is not present, the SYNC LED will flash orange to indicate this loss of lock and that the failover source is in use. In addition, the display will provide a text indication of this condition.

Model 5401A User Guide Page 18 Studio Technologies, Inc. Force Preferred Leader: This is a configu- rable field with two choices: Disabled and Enabled. This function impacts how the Model 5401A will control a Dante network’s selection of which device is going to serve as the Leader clock. As the main reason for the Model 5401A’s existence is to serve as a Leader clock, in most applications the unit should be serving in that role. By forcing the Model 5401A to be a Preferred Leader clock it helps to ensure optimal Dante network operation. By enabling this configuration, users of the Dante Controller application will not be able to accidentally disable the Model 5401A as a Preferred Leader. One can observe exactly what is meant by the term Force Preferred Leader by unchecking the Model 5401A’s Preferred Leader check box in Dante Controller. After a short inter- val the box will automatically return to the enabled (checked) state. How the Model 5401A handles forcing the Dante network to be a Preferred Leader clock and, if applicable, automatically sup- porting an external clock input is not trivial. This ability to control Dante network opera- tion is part of the unit’s “secret sauce.” If the Model 5401A’s clock source is configured for Dante then the Model 5401A will force off (uncheck) the Enable Sync to External selection in Dante Controller. If the Model 5401A’s main clock source is configured for Internal or Sync Input then the Model 5401A will force on (check) the Enable Sync to External configuration in Dante Controller. This will apply as long as this specific Model 5401A is acting as Primary Leader, Leader, or AES67 Leader. Submit: A Submit button is located below the Force Preferred Leader field. For any changes made to the three configurable fields on the Main menu webpage to be saved and acted upon the Submit button must be pressed. Current Clock Source: This is a display- only field with choices of Internal, Internal (Failover Active), Sync Input, Dante, and Dante (Failover Active). The text Failover Active will display in red as a warning of an abnormal condition that warrants intervention. The current clock source field can also display --- which in- dicates a major hardware error and would warrant contacting the factory. When Internal is displayed it indicates that the Model 5401A’s internal temperature- stabilized oscillator is being used as its timing reference. When Internal (Failover Active) is displayed an abnormal condition is occurring. In this case, the Model 5401A has been configured to use an external sync signal as the main clock source but a valid one is not available; it is using its internal temperature-stabilized oscillator as the failover timing reference. If Sync Input is displayed this indicates that an external timing reference signal is connected to the sync input BNC jack on the Model 5401A’s back panel and it is being used as the main clock source. If Dante is displayed this indi- cates that the Model 5401A is using a timing reference derived from its Dante network interface. This is not an invalid condition but would typically only occur in a troubleshoot- ing situation. If Dante (Failover Active) is displayed an abnormal condition is occur- ring. In this case, the Model 5401A is using a timing reference derived from its Dante network interface. However, this is only oc- curring because the configured main clock source is not currently available. Sync Input Status: This is a display- only field with choices of Locked (Active), Locked (Standby), Unlocked, and Idle. As a warning of an abnormal condition the text Unlocked will display in the color red. If Locked (Active) is displayed this indicates that a valid signal is connected to the Model

Issue 2, July 2021 Studio Technologies, Inc. Page 19 5401A’s sync input and is serving as the unit’s timing reference. If Locked (Standby) is displayed this indicates that a valid sig- nal is connected to the Model 5401A’s sync input and while it is capable of serving as the unit’s main timing reference it is not cur- rently serving as the main clock source. If Unlocked is displayed it can be the re- sult of several conditions. It can display if a signal is connected to the Model 5401A’s sync input but is not being recognized as a valid timing reference. This can occur for multiple reasons. The most common would be due to a configuration mismatch, such as if a video reference is connected while the Model 5401A’s sync input is configured to support a word clock source. It might also indicate that a non-supported word clock rate or an incompatible video reference is connected. Unlocked could also be dis- played if no signal is connected to the sync input or if a connected signal is incorrectly terminated, e.g., no termination applied when one is required or if two terminations (“a double termination”) were present. Idle will display if the sync input has not been selected as the Model 5401A’s main clock source and a valid source has not been connected to the sync input. It simply indicates that the sync input circuitry is not actively receiving an external signal. Primary Leader Clock: A display-only field will show the MAC (media access control) address of the Dante network’s currently active Primary Leader Clock. Displayed to the right of the MAC address will be an ad- ditional piece of information about what spe- cific device is associated with the displayed MAC address. If the MAC address is asso- ciated with this specific Model 5401A then the text will show (This Device). If the MAC address is not for this specific Model 5401A the text will show (Other Device). A logical question to ask would be “so what is this Other Device?” Unfortunately, the Model 5401A’s firmware does not have the ability to know more about a specific Primary Leader Clock other than its MAC address. It can only determine if the MAC address matches this specific Model 5401A or not. If the address doesn’t match then another device has to be serving as the Primary Leader. The Dante Controller may provide more detailed information about a Dante network’s clocking. And network soft- ware or hardware tools may allow a MAC address to be associated with a specific device. Note that the information provided in this field can be a bit confusing, even to the writer of this guide. But for a network maven it can be very useful when troubleshooting a complex network timing issue. Reviewing several related issues to Primary Leader Clock can be valuable. First of all, it’s impor- tant to note that the reference to the word primary in “Primary Leader Clock” has noth- ing to do with the primary and secondary Ethernet interfaces! In this context Primary Leader Clock refers to the device that all other devices in a Dante network will follow. In most cases, a Model 5401A will serve as the Primary Leader Clock. But there is no requirement that it must play this role. For example, a Model 5401A can serve as a Leader Clock while following the timing provided by another device that’s serving as the Primary Leader Clock. For another example, one Model 5401A could serve as the Primary Leader Clock while several oth- er Model 5401A units serve as PTP bound- ary clocks. These boundary clocks would, by way of a unicast PTP message, synchro- nize with the Primary Leader Clock. The boundary clocks could then provide PTPv1 and PTPv2 functionality (using multicast) with timing based on that derived from the Primary Leader Clock. This method may be

Model 5401A User Guide Page 20 Studio Technologies, Inc. used to provide Dante device timing across different subnets for complex or especially large applications. For more in-depth control of these clocking issues the Dante Domain Manager (DDM) software application can be very useful. Dante Sync Status: The Model 5401A can simultaneously serve as a Leader clock for both Dante primary and Dante secondary networks and is capable of supporting both PTPv1 (IEEE 1588-2002) and PTPv2 (IEEE 1588-2008). As such the unit is capable of acting as four independent Leader clocks: PTPv1 for Dante primary, PTPv2 for Dante primary, PTPv1 for Dante secondary, and PTPv2 for Dante secondary. While the PTP processes are asymmetrical, they do share the same internal timing reference. The Model 5401A can also act as a PTPv1 and PTPv2 clock follower but that would typically be utilized only for test purposes. Standard and Redundant Dante (no AES67 support) uses PTPv1 and that is always enabled in the Model 5401A. AES67 utilizes PTPv2 clocking and if support for AES67 is desired within the Dante environment it must be enabled using a configuration set- ting in the Dante Controller application. The Model 5401A’s Main menu has four fields that display the real-time sync sta- tus of the PTPv1 and PTPv2 functions for the Dante primary and Dante secondary interfaces. If the network configuration in Dante Controller for this specific Model 5401A has been selected for Switched or Switched+Mgmt the clocking status of the Dante primary interface will be displayed. In this situation, the Dante primary PTPv1 interface will show Leader, Follower, Link Down, or Error (with the latter showing in red text). If AES67 support is enabled in Dante Controller then the same choices will also be displayed in the primary PTPv2 field. If AES67 support is not enabled then Disabled will show in the primary PTPv2 field. Since Dante secondary is not enabled then the secondary PTPv1 and secondary PTPv2 fields will show Disabled. If the Model 5401A’s network configura- tion has been selected for Redundant or Redundant+Mgmt then both the primary PTPv1 and secondary PTPv1 sync sta- tus fields will display their respective sync status. They will show the same choices as described above: Leader, Follower, Link Down, or Error (with the latter showing in red text). If AES67 support is enabled in Dante Controller then the same choices will also be displayed in the primary PTPv2 and secondary PTPv2 fields. If AES67 support is not enabled then Disabled will show in both the primary PTPv2 and secondary PTPv2 fields. Should Leader be displayed in a specific field it would indicates that this specific Model 5401A is acting as the Leader clock for the Dante network and clock function associated with that field. If Follower is dis- played this indicates that this specific Model 5401A is obtaining its timing reference from another Dante device on the network. This would be the current display if this specific Model 5401A was serving as a “hot” stand- by Dante Leader clock. If Link Down is displayed this will indicate that a valid Ethernet connection has not been made to the RJ45 jack associated with that field’s Model 5401A’s Ethernet inter- face. A display of Error would indicate that this specific Model 5401A is having a per- manent or temporary issue with its internal circuitry. There may be occasions where Error would display for a few seconds while Model 5401A circuitry first becomes active. Sync Input Menu The Sync Input menu has parameters that are related to the Model 5401A’s sync input. This allows an external source of timing to

Issue 2, July 2021 Studio Technologies, Inc. Page 21 be connected to the Model 5401A by way of a BNC jack that is located on the unit’s back panel. Refer to Appendix E for a view of the Sync Input menu. Lock Status: This is a display-only field that can show Unlocked, Locked followed by one of the word clock rates, Locked fol- lowed by one of the video rates, or Locked (10 MHz). It’s also possible that it could display Error which would indicate a Model 5401A hardware problem. This would be a rare occurrence and, in this case, contact- ing the factory would be recommended. This field reflects the operation of the Model 5401A’s sync input circuitry. Unlocked will display if no signal source is connected or if the connected source doesn’t match the selected sync input type. For example, Unlocked will display if Word Clock has been selected as the sync input type but a video sync signal has been connected. The detected rate will be displayed follow- ing the term Locked whenever the sync input is locked to the connected signal. If this is a word clock signal then one of the six compatible rates will be displayed: 44.1, 48, 88.2, 96, 176.4, or 192 kHz. If Locked displays due to a video source being con- nected then the actual rate/format charac- teristics will also be displayed. If the sync input is locked due to a 10 MHz signal being recognized then Locked (10 MHz) will dis- play. The compatible sync input sources are listed in Appendix A of this guide. Unlocked will be displayed, in the text color red, if the sync input has been selected on the Main menu as the Model 5401A’s clock source but either no signal is connected to the sync input or a non-compatible signal is connected. A non-compatible signal would include a sync input type being selected for Word Clock and then a word clock signal at a different rate than the current Dante sample rate is connected. For example, an incompatible situation would be where the current Dante sample rate is 48 kHz but the connected word clock signal is 96 kHz. Probably the most common non-compatible signal would be a situation where a video reference signal is connected to the sync input but the sync input type was left at the default (Word Clock) rather than being se- lected for Video. Current Dante Sample Rate: This is a display-only field that can show 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, or 192 kHz. It can also display Error in the unlikely event that there is an issue with the Brooklyn II module that provides the Model 5401A’s Dante interface. This field displays the Model 5401A’s cur- rently selected sample rate as used by the Model 5401A’s Dante transmitter (output) channels. The Dante transmitter (output) channels provide eight sine wave tone labeled Tone 1 through Tone 8. Changes to the Dante sample rate are made using the Dante Controller software application. Type: This is a configurable field with three choices: Word Clock, Video, or 10 MHz. If the Model 5401A’s clock source has been selected to Sync Input on the Main menu the type of connected source must be de- fined to match the application. If Word Clock is selected then a square wave source with a rate of 44.1, 48, 88.2, 96, 176.4, or 192 kHz needs to be connected. For proper operation the nominal unloaded level of the word clock source must be 5 volts DC peak- to-peak. Also, the connected word clock source must match the displayed current Dante sample rate. This is a bit of a “chick- en or the egg” situation since it can be con- fusing as to who is supposed to control the sample rate and who is supposed to follow the sample rate! The Dante Controller soft- ware application should be used to select the desired Model 5401A sample rate. This

Model 5401A User Guide Page 22 Studio Technologies, Inc. is the sample rate desired for the sine wave audio channels provided by the tone gen- erator function. In most applications this will be 48 kHz. It’s possible that in some audio- only applications 96 kHz or even 192 kHz will be selected. Once the desired sample rate has been selected and/or confirmed, an external word clock source of the same rate should be connected. If the available external word clock source has a rate differ- ent than the current Dante sample rate then a review of the entire application must be performed and a common rate selected. If Video is selected for the sync input type then a wide range of bi- and tri-level video reference signals can be connected to the sync input BNC jack. The Model 5401A’s circuitry will automatically decode many of the most common format/rate combinations. These include ubiquitous “black burst” sig- nals as well as signals intended to support 4K video applications. Refer to Appendix A at the end of this guide for a detailed list of compatible video sources. If 10 MHz is selected then the sync input is expecting connection of a sinusoidal source of 10 MHz. A signal of this type is typically associated with industrial or instrumentation applications. It may also be provided by a GPS (satellite) receiver. If a choice of sync sources is available for a specific application it’s recommended that a source of word clock be utilized. This is not because a word clock source is inher- ently better, but rather the recommendation is related to the Model 5401A’s circuit de- sign. The unit’s logic circuitry has to per- form the least amount of processing with a word clock input signal as compared to that required to utilize a video reference or a 10 MHz signal. All compatible signals will work well but using a source of word clock re- quires the least logic “horsepower.” Termination: This is a configurable field with two choices: Off and On. If desired, the Model 5401A can apply a terminating impedance to the sync input connection. The need for an input source to be terminated, or not, will depend on the source of the external sync signal. Typically, a source of sync should have one (and only one) termination applied. A timing reference source can generally be shared (“bused”) to multiple devices with only the last connec- tion on the “string” having an appropriate termination. If the sync input termination is configured for Off then the sync input’s impedance will be considered “high Z.” If the sync input termination is selected to On and the sync input type is selected for Word Clock or Video the termination impedance will be 75 ohms. If 10 MHz has been selected as the sync input type then a termination imped- ance of 50 ohms will be applied. These termination values were selected to meet the technical requirements of indus- try-standard reference signals. Word clock should be a square wave with a source impedance of 75 ohms. Video is typically a complex analog signal with a source imped- ance of 75 ohms. And a 10 MHz reference is a normally a sine wave with a source impedance of 50 ohms. Submit: A Submit button is located on the bottom of the Sync Input menu webpage. To save any changes made to fields on the Sync Input webpage requires that the Sub- mit button be pressed. The Model 5401A will immediately incorporate operating changes as soon as the Submit button has been pressed. Tone Generator Menu The Model 5401A’s tone generator function is capable of creating eight precision sine

Issue 2, July 2021 Studio Technologies, Inc. Page 23 wave tones with independent frequency and level configuration. The frequency range is 1 to 22000 hertz (Hz) and the level range is –99 to 0 dBFS. Refer to Appendix E for a view of the Tone Generator menu. The tone signals have Dante transmitter (out- put) default names of Tone 1 through Tone 8. It’s expected that most applications will only use a few of the tones. But having eight out- put channels provides flexibility in creating a set of tones with various frequency and level combinations. These can be useful in a range of applications including identifying individual channels in a multi-channel arrangement, e.g., stereo, 5.1, or 7.1. Frequency (Hz): These eight fields reflect the Model 5401A’s currently selected sine wave tone generator frequencies. For each channel enter the desired frequency in full hertz. Don’t use a suffix such as k or kHz, nor enter a comma or period to delineate thou- sands. Entering 1001 would be correct while 1,001 or 1.001 k would not be acceptable. The default tone frequencies were selected in hundreds of hertz with the first digit match- ing the channel number: 100, 200, 300, etc. This can be useful when checking a series of channels as this pattern can be easily recog- nized either by ear or using equipment that can display the frequency in text. Some ap- plications may need the common 1000 or 10000 Hz reference sine wave tones and there’s no problem configuring these if desired. Level (dBFS): These eight fields display the level of the Model 5401A’s sine wave tone outputs. The output level for each of the audio output channels is independently adjustable over a range of –99 to 0 dBFS. The level is selectable in 1-dBFS steps. Enter the desired level in full dBFS with a hyphen as the prefix to indicate less than full scale. In applications that comply with the SMPTE® audio standards the typical nominal level will be –20 dBFS which can be thought of as 20 dB less than full scale or digital 0. In EBU applications the typical nominal level will be –18 dBFS. Some applications may benefit from a sine wave test tone that’s 12 dB less than the reference level. This would equate to configuring an output to –34 dBFS (SMPTE) or –32 dBFS (EBU). These would typically be associated with a 1000 Hz tone. The default tone levels were selected in a pattern that could help identify a specific channel. Dante transmitter (output) channel Tone 1 has a default level of –21 dBFS with the value of 1 being selected to reflect the channel number. Each subsequent chan- nel then reduces its level by 1 dB. So, for example, the second channel, Tone 2, has a level of –22 dBFS. While these level steps may not be readily discernible to human ears most test equipment or metering could easily be used to identify specific channels. Submit: A Submit button is located at the bottom of the Level (dBFS) column on the Tone Generator menu webpage. To save any changes made to the level or frequency fields requires that the Submit button be pressed. Changes will be made immediately after pressing the Submit button. Network Menu Refer to Appendix E for a view of the Network menu. Interfaces There are twelve display-only fields that relate to the key parameters that are associ- ated with the Dante and management inter- faces. For clarity they display in the form of a simple table. IP Addresses: These three display-only fields will show the current IP addresses associated with the Model 5401A’s Dante primary, Dante secondary, and manage-

Model 5401A User Guide Page 24 Studio Technologies, Inc. ment ports. The Dante primary and manage- ment fields will show either Link Down or an IP address. The Dante secondary field will show Disabled, Link Down, or an IP address. Link down will display if an Ethernet connec- tion has not been made to the appropriate RJ45 jack on the Model 5401A’s back panel. Disabled will show if Dante redundancy has not been enabled in the Dante Controller application. The 32-bit IP v4 addresses will be displayed in what’s known as dot-decimal notation (4 octets, each separated by a dot). How the IP addresses are assigned will de- pend on the Model 5401A’s network configu- ration setting as performed using the Dante Controller application. Each IP address can be established automatically using a DHCP server or the IPv4 link-local protocol. An IP address assigned to the Dante primary interface by link-local will have a format of 169.254.x.x. An IP address assigned to the Dante secondary interface by link-local will have a format of 172.31.x.x. The Dante primary and secondary IP addresses can also be individually set to a manual (static or fixed) IP addresses using the Dante Control- ler application. If the network configuration is selected for switched the Dante primary IP address will be associated with a network connec- tion made to either the Dante primary or Dante secondary RJ45 jacks on the Model 5401A’s back panel. Link down will display if no connection is present. The IP address for the Dante secondary interface will show disabled as it is not being utilized in this network mode. The management IP address will be associated with a network connection made to the management RJ45 jack on the Model 5401A’s back panel. If the network configuration is selected for Redundant then the Dante primary IP ad- dress will be associated with the RJ45 jack labeled PRI on the Model 5401A’s back panel. Link Down will display if a valid Ethernet connection has not been made to the Dante primary Ethernet interface. The Dante secondary IP address will be associ- ated with the RJ45 jack labeled SEC on the Model 5401A’s back panel. Link Down will display if a valid Ethernet connection has not been made with the Dante secondary Ether- net interface. The management IP address with be associated with a network connec- tion made to the RJ45 jack labeled MGMT on the Model 5401A’s back panel. If the network configuration is selected in Dante Controller for Switched+Mgmt then the Dante primary IP address will be asso- ciated with a network connection made to either the Dante primary or the Dante sec- ondary RJ45 jacks on the Model 5401A’s back panel. The IP address field for the Dante secondary interface will show Dis- abled as it is not be utilized. The manage- ment IP address will be associated with a network connection made to either the Dante primary or Dante secondary RJ45 jacks If the network configuration is selected for Redundant+Mgmt then the Dante primary IP address will be associated with a connec- tion made to the RJ45 jack labeled PRI on the Model 5401A’s back panel. Link Down will display if a valid Ethernet connection has not been made. The Dante secondary IP address will be associated with an Ethernet connection made to the RJ45 jack labeled SEC on the Model 5401A’s back panel. Link Down will display if a valid Ethernet connec- tion has not been made with the Dante sec- ondary Ethernet interface. The management IP address with be associated with a net- work connection made to the Dante primary RJ45 jack located on the Model 5401A’s back panel. If the Model 5401A’s network configuration in Dante Controller is selected for Switched or Switched+Mgmt ensure that only one of the RJ45 jacks on the back panel is con- nected to the LAN associated with the Dante

Issue 2, July 2021 Studio Technologies, Inc. Page 25 devices. The other RJ45 jack can be used to interconnect with another piece of net- worked equipment. But having both the Model 5401A’s Dante primary and Dante secondary RJ45 jack routed to ports on the same LAN will typically “crash” the network! Subnet Mask Values: These three fields will show the subnet mask values associ- ated with the Dante primary, Dante second- ary, and management ports. They will show either Link Down or a subnet mask value. The subnet mask value will be displayed in dot-decimal notation. When the IP address of the Dante primary or Dante secondary interfaces have been obtained using link- local the subnet mask value will always be 255.255.0.0. Gateway Addresses: These three fields will show the gateway address associated with the Dante primary, Dante secondary, and management ports. They will show either Link Down, ---, or a value in dot-deci- mal notion. A gateway address is usually obtained using DHCP or by way of a fixed (or static) stored value. When an IP address has been obtained using link-local then there will be no gateway address and --- will display. A Dante interface will typically only use a gateway address as a means of ac- cessing an update server that’s is located outside of the Dante network’s LAN. MAC Addresses: Three display-only fields will show the MAC (media access control) addresses associated with the network in- terface controller (NIC) devices used for the Dante primary, Dante secondary, and man- agement ports. These are fixed hardware addresses assigned to Ethernet ports. Each is unique among all Ethernet ports and can- not be changed. The Model 5401A displays MAC addresses as six groups of two hexa- decimal digits, separated by hyphens. No MAC address will be displayed if an Ether- net interface has been disabled. Switch Configuration: This is a display- only field that shows the Model 5401A’s network configuration as determined by a setting in the Dante Controller applica- tion. The term “Switch” refers to an Eth- ernet switching and routing integrated circuit that is part of the Model 5401A’s hardware. How this integrated circuit is configured determines the how the Model 5401A’s three GigE Ethernet ports function. The field will show Switched, Redundant, Switched+Mgmt, or Redundant+Mgmt. It will also display Error in the unlikely event that an error in the Dante interface circuit, provided by a Brooklyn II module, has occurred. Management Interface Configuration There are four fields that relate to the Model 5401A’s management interface. They don’t have any relation to the Dante primary and Dante secondary IP addresses and their associated network parameters. IP Address Configuration: This is a con- figurable field with two choices: Automatic and Manual. The selected configuration impacts how the Model 5401A obtains the IP address that is used for accessing the Model 5401A’s man- agement web server and associated menu webpages. This setting has no impact on how the Model 5401A obtains IP addresses for the primary and secondary Dante IP interfaces. Selecting the Automatic setting causes the Model 5401A to use the DHCP or, if DHCP is not available, the IPv4 link-local protocol to establish the IP address for the Model 5401A’s management port. When selected to use Automatic, upon establishing a con- nection to the configured Model 5401A RJ45 jack the DHCP protocol will request an IP address and related parameters. If

Model 5401A User Guide Page 26 Studio Technologies, Inc. obtaining an IP address in this manner is not successful then the IPv4 link-local proto- col will be used. (If an IP address has the format of 169.254.x.x then it was assigned using IPv4 link-local.) Even if the IP ad- dress was established using link-local the DHCP protocol will remain active. In this case, approximately every 30 seconds the Model 5401A’s firmware will check for the presence of a DHCP server. If one be- comes available then an IP address will be requested and, when obtained, will auto- matically replace the IP address that was previously established by link-local. The Manual setting allows the desired IP address and related parameters to be manually entered. This can be useful when a fixed addressing scheme has been estab- lished. In this way, a static IP address can be entered along with the other important network parameters. When selected for Automatic the fields for the manual IP address, subnet mask value, and gateway IP address will be “grayed out” (will have a gray background) to indi- cate that their values cannot be manually changed. In this condition they are display- only. Changing between Automatic and Manual and vice-versa will not impact the values stored in the manual IP address, manual subnet mask value, and manual gateway IP address fields. Note that to minimize the chance of los- ing access to the management web server, restoring the Model 5401A’s default configu- ration values will not change the currently selected IP address configuration choice. Manual IP Address: This field shows the stored IP address associated with the management web server when the manual mode has been selected for the IP address configuration. This address has nothing to do with the IP address utilized by the prima- ry and secondary Dante ports. When IP address configuration is selected for Auto- matic this field is grayed out and the value cannot be revised. Whenever the IP ad- dress configuration is selected for Manual the manual IP address can be modified as desired to meet the requirements of the application. After entering an IP address, using the standard dot-decimal notation, the Submit button at the bottom of the webpage must be pressed for the changes to be stored. A system reboot is required for the revised manual IP address to be utilized. The Reboot function is available on the sys- tem webpage and the front panel. Restoring the Model 5401A to its default values will not change the stored manual IP address. Manual Subnet Mask Value: This field shows the stored subnet mask value as- sociated with the management web server when the manual mode has been selected for the IP address configuration. When IP address configuration is selected for Auto- matic this field is grayed out and the value cannot be revised. When the IP address configuration is selected for Manual this field will not be grayed out and the value can be modified as desired to meet the requirements of the application. After en- tering a revised subnet mask value, using the standard dot-decimal notation format, the Submit button must be pressed for the change to be stored. A system reboot is required for the revised subnet mask value to be utilized. Restoring the Model 5401A’s default values will not change the stored manual subnet mask value. Manual Gateway: This field shows the stored gateway value associated with the management web server when the manual mode has been selected for the IP address configuration. When IP address configura- tion is selected for Automatic the manual gateway field is grayed out and the value cannot be revised. When the IP address configuration is selected for Manual this

Issue 2, July 2021 Studio Technologies, Inc. Page 27 field will not be grayed out and the value can be modified as desired. After enter- ing a revised gateway value, using dot- decimal notation, the Submit button must be pressed for the change to be stored. A system reboot is required for the revised gateway value to be utilized. Restoring the Model 5401A’s default values will not change the stored manual gateway value. Submit: The Submit button is located at the bottom of the Management Interface area of the Network menu webpage. To save any changes made to four fields in the Manage- ment Interface requires that the Submit button be pressed. To utilize those changes requires that a Model 5401A reboot to take place. That can occur by using the system Reboot function on the system webpage or a selection on the front panel’s menus. Access Menu As a security method a user name and password must be entered before the con- figuration webpages can be accessed. (This is what you did to get this far!) These values can be changed as desired. Refer to Appen- dix E for a view of the Access menu. The Model 5401A’s access security method is in no way rigorous. The user name and password are sent to and received from the Model 5401A as plain text. They are also stored within the Model 5401A as plain text. There is no security method or encryp- tion associated with these fields. Anyone “snooping” on the LAN that is transporting Model 5401A management data will see all values in plain text. The ability to select user name and password values is intended sim- ply to provide a means of keeping “honest” users from easily changing the configuration of a Model 5401A. If unauthorized access is of concern then it’s recommended that the Model 5401A’s network configuration be selected for Switched or Redundant. And then an Ethernet connection to the Model 5401A’s management RJ45 jack should not be present except when access by autho- rized personnel is desired. The default user name is guest and the default password is guest. These are case sensitive. If neither of the default entries are changed then they will display in the user name and password entry fields on the Login menu webpage. If the default user name and/or default password is changed then neither the user name nor the pass- word will display upon accessing the Login menu webpage. Management Log Credentials User Name: In this field a revised user name can be entered. The user name must be a minimum of five characters, a maxi- mum of 15 characters, and is case sensi- tive. All 95 of the printable ASCII characters can be used. These include upper and lower alphabetic characters, numbers, and standard punctuation marks. New Password: In this field a revised password can be entered. The password must be a minimum of five characters, have a maximum of 15 characters, and is case sensitive. All 95 of the printable ASCII char- acters can be used. These include upper and lower alphabetic characters, numbers, and standard punctuation marks. Confirm New Password: For a new pass- word to be considered valid, enter it identi- cally into this field. Submit: The Submit button is located below the field for Confirm New Password. To save changes made to the user name and/or New password fields requires that the Submit button be pressed. Changes made will be effective upon the next attempt at logging into the Model 5401A. Restor- ing the Model 5401A to its default values does not change the stored user name and password.

Model 5401A User Guide Page 28 Studio Technologies, Inc. System Menu This menu has six display-only fields as well as functions that allow the default set- tings to be restored and the system to be rebooted (restarted). Refer to Appendix E for a view of the System menu. One of the display-only fields shows the hardware serial number and the remain- ing six provide details about the firmware (embedded software) that is being actively utilized by the Model 5401A. Serial Number: This is a display-only field that shows the Model 5401A’s hardware serial number. This number has been assigned at the factory and cannot be changed. Version Information: The version informa- tion section consists of five rows of infor- mation that provides details about the five firmware (embedded software) files that are being used by the Model 5401A. These are display only and will include a date if that is specified as part of the firmware release. Main MCU Firmware: This display-only field shows the version number and asso- ciated release date of the Model 5401A’s Main MCU firmware. This firmware can be field-updated using a USB flash drive. Update details are provided in the Technical Notes section of this guide. Main FPGA Firmware: This display-only field that shows the version number and associated date of the Model 5401A’s Main FPGA (field-programmable-gate-array) firm- ware. This firmware can be field-updated using a USB flash drive. Update details are provided in the Technical Notes section of this guide. Sync FPGA Firmware: This display- only field shows the version number and associated date of the Model 5401A’s synchronization board FPGA (field-program- mable-gate-array) firmware. This firmware can be field-updated using a USB flash drive. Update details are provided in the Technical Notes section of this guide. Dante Product: This display-only field shows the product version number and associated date that’s stored in and being utilized by the Dante interface. (The Dante interface is implemented using a Brook- lyn II module from Audinate.) This version number is assigned by Studio Technologies as an identifier when a file is released that combines specific Model 5401A configura- tion information along with Dante operat- ing firmware. The firmware for the Model 5401A’s Dante interface can be updated by way of an Ethernet connection using the Dante Updater software application that’s provided as part of the Dante Controller software application. Dante Firmware: This is a display-only field that shows the version number of the firm- ware associated with the Dante interface (Brooklyn II module) that the Model 5401A utilizes for Dante interconnectivity. No date is associated with this file. The displayed version number is assigned by Audinate and can’t be changed by Studio Technolo- gies. It is incorporated into the Dante Prod- uct (.dnt) file that is released by Studio Technologies’ specifically for the Model 5401A. As noted previously, this firmware, part of the Dante product firmware, can be updated by way of an Ethernet connec- tion using the Dante Updater software application. Restore Default Settings: The Restore Default Settings function allows many of the Model 5401A’s default configuration settings to be restored. However, it will not impact the network configuration or user name and password settings. For the defaults to be restored the associated check box must be enabled prior to pressing the Submit but- ton. Be careful when using this function as invoking it after enabling the check box will

Issue 2, July 2021 Studio Technologies, Inc. Page 29 immediately cause the defaults to be re- stored. Refer to Appendix F for a list of the default values. System Reboot: The Reboot function is located on the bottom of the System menu webpage. It allows the Model 5401A to be rebooted (restarted) without having to per- form a power cycle. (The function can be considered to invoke a “cold boot.”) For a system reboot to take place the check box must be enabled prior to pressing the Reboot button. During normal operation a system reboot will never be required. But after changes are made to any of the unit’s management interface network configura- tion a reboot is required. A system reboot will cause the three Ethernet interfaces to go through a reconnection process, necessary should any of the management network pa- rameters be revised. (These changes can be made by way of the Network menu choices or using the front-panel display and buttons.) Menu Text and Links The following provides details on some of the text and links that are presented on the Model 5401A’s webpages. Device Name: In the upper-right corner of each Model 5401A webpage is the Dante device name. This name is unique to each device in a Dante deployment and is used as part of the Dante subscription (channel routing) process. The name can be changed from within the Dante Controller application. Identify Device Link: In the upper-right corner of each webpage, directly below the device name, is a link called Identify Device. Clicking on it will cause the Dante identify action to commence on the specific Model 5401A. The action will consist of the front- panel display’s green backlight flashing five times. This command will help confirm that the web server on the desired Model 5401A is being accessed. Company Name Link: On the bottom of each webpage is a link with the title Studio Technologies, Inc. Clicking on this link will cause the browser to open the Home web- page of the Studio Technologies website. Log Out Link; In the upper-right corner of most of the Configuration menu webpages is a link called Log Out. It will cause the Model 5401A’s web server to end the session, log- ging out the user and returning to the Home menu. To again access the configuration webpages requires that the user click on the Login tab and provide a valid user name and password. Operation Now that the Model 5401A is installed and configured it’s ready for use. The unit is de- signed for continuous, unattended operation. However, there are a number of nuances in the unit’s operation. This may make it worthwhile for personnel to spend some time reviewing this section. Upon application of AC mains or DC power, the Model 5401A will go through a power-up sequence. The eight bi-color LEDs on the Model 5401A’s front panel will light green, then light red in a confirmation sequence. The unit’s graphics display will show the Studio Technologies logo graphics image, followed by a menu page that shows the product name (Model 5401A) and the Dante name. Then the version number of the Main MCU firmware will display. After a few sec- onds the screen saver mode, detailed later in this section, will begin operation. Upon power being applied the green LED adjacent to the USB receptacle on the back panel will flash once to indicate that its as- sociated circuitry is performing correctly. Also, upon power being applied to the Model 5401A the LEDs on the back panel associat- ed with the unit’s three Ethernet RJ45 jacks will briefly flash as a functional test.

Model 5401A User Guide Page 30 Studio Technologies, Inc. After the Model 5401A has completed its power-up sequences the unit will begin operation. The eight front-panel LEDs will reflect the real-time status of the unit’s major functions. The front-panel display will allow the viewing of over 20 menu pages show- ing status and configuration conditions. In addition, using the front-panel pushbutton switches some of the unit’s configuration settings can be revised as required. The following paragraphs will detail the operation of the front-panel LEDs. Power LEDs Two LEDs indicate the presence of incoming AC mains and nominal 12 volts DC power. They are labeled AC and DC and can light green or red. When a source of AC mains power is connected the AC LED will light green. (This is actually in response to 12 volts DC that is being generated by the in- ternally located AC mains input/12 volts DC output power supply.) The LED labeled DC will light green whenever a connected DC source exceeds approximately 10 volts. The DC LED will light red when the DC input is between approximately 9 and 10 volts, indi- cating a low-voltage condition. Once the DC input is less than approximately 9 volts the DC LED will not light and the Model 5401A will no longer operate from the DC source. Network LEDs Three LEDs provide status indications re- lated to the Model 5401A’s three Ethernet network interfaces. Two of the LEDs are associated with the Model 5401A’s Dante primary and Dante secondary Ethernet ports. They are labeled PRI and SEC. The third LED, labeled MGMT, is associated with the unit’s management Ethernet port. The way in which the three Ethernet interfaces and their associated status LEDs function depend on the network configuration as selected using the Dante Controller applica- tion. The choices are Switched, Redundant, Switched+Mgmt, and Redundant+Mgmt. Switched Network Operation PRI LED: The PRI LED will light red when no Ethernet connection is present on the Dante primary or Dante secondary Ethernet ports. It will light green whenever a Gigabit Ethernet connection is present on either the Dante primary or the Dante secondary Ethernet port and a link has been established. It will light orange whenever a 100 Mb/s Ethernet con- nection is present on either the Dante prima- ry or the Dante secondary Ethernet port and a link has been established. SEC LED: The SEC LED will not light. MGMT LED: When no Ethernet connection is present on the management Ethernet port the MGMT LED will not light. It will light green whenever a Gigabit or 100 Mb/s Ethernet signal is connected and a link has been established. Redundant Network Operation PRI LED: The PRI LED will light red when no Ethernet connection is present on the Dante primary Ethernet port. It will light green when- ever a Gigabit Ethernet connection is pres- ent on the Dante primary Ethernet port and a link has been established. It will light orange whenever a 100 Mb/s Ethernet connection is present and a link has been established. SEC LED: The SEC LED will light red when no Ethernet connection is present on the Dante secondary Ethernet port. It will light green whenever a Gigabit Ethernet connec- tion is present on the Dante secondary Ethernet port and a link has been estab- lished. It will light orange whenever a 100 Mb/s Ethernet connection is present and a link has been established. MGMT LED: When no Ethernet connection is present on the management Ethernet port the MGMT LED will not light. It will light green

Issue 2, July 2021 Studio Technologies, Inc. Page 31 whenever a Gigabit or 100 Mb/s Ethernet connection is present and a link has been established. Switched+Mgmt Network Operation PRI LED: The PRI LED will light red when no Ethernet connection is present on the Dante primary or Dante secondary Ethernet ports. It will light green whenever a Gigabit Ethernet connection is present on the Dante primary or Dante secondary Ethernet ports and a link has been established. It will light orange whenever a 100 Mb/s Ethernet con- nection is present on either Ethernet port and a link has been established. SEC LED: The SEC LED will not light. MGMT LED: The MGMT LED will not light if an Ethernet connection is not present on the Dante primary or Dante secondary Ethernet ports. It will light green whenever a Gigabit or 100 Mb/s Ethernet connection is present on either the Dante primary or Dante sec- ondary Ethernet port and a link has been established. Redundant+Mgmt Network Operation PRI LED: The PRI LED will light red when no Ethernet connection is present on the Dante primary Ethernet port. It will light green whenever a Gigabit Ethernet connection is present on the Dante primary Ethernet port and a link has been established. It will light orange whenever a 100 Mb/s Ethernet con- nection is present on the Dante primary Eth- ernet port and a link has been established. SEC LED: The SEC LED will light red when an Ethernet connection is not present on the Dante secondary Ethernet port. It will light green whenever a Gigabit Ethernet connec- tion is present on the Dante secondary Eth- ernet port and a link has been established. It will light orange whenever a 100 Mb/s Ethernet connection is present on the Dante secondary Ethernet port and a link has been established. MGMT LED: The MGMT LED will not light if an Ethernet connection is not present on the Dante primary Ethernet port. It will light green whenever a Gigabit or 100 Mb/s Ethernet connection is present on the Dante primary Ethernet port and a link has been established. Dante LEDs Two LEDs are associated with the Model 5401A’s Dante interface. The system LED, labeled SYS, and the synchronization LED, labeled SYNC, will both light red as the Model 5401A’s Dante interface starts to func- tion and awaits connection and full operation with one or two local area networks (LANs). (Two networks are utilized only when Dante redundancy is enabled.) The SYS LED will light red to indicate that the Dante interface is not ready to pass data to other devices. It will blink red if there is an issue commu- nicating with the internal Dante Brooklyn II module. It will light green when the Dante interface is operating normally and is ready to pass Dante data. The SYNC LED will light red to indicate that the Model 5401A’s Dante interface has not established timing synchronization. The complete action of the SYNC LED will de- pend on the Switch configuration as set using the Dante Controller application. If Switched or Switched+Mgmt has been se- lected then the SYNC LED will slowly flash green if this specific Model 5401A is serving as the PTPv1 Leader clock for the associ- ated Dante network. This will be a normal situation as usually this unit will be provid- ing the timing reference for all of the other Dante devices. The SYNC LED slowly flash- ing green can be misconstrued as an error condition, but it is not. The SYNC LED slowly flashing green will mimic the action that other Dante devices will perform if they are acting as the Leader clock.

Model 5401A User Guide Page 32 Studio Technologies, Inc. The SYNC LED will slowly flash orange if the Model 5401A is serving as the PTPv1 Leader clock for the Dante network and its failover mode is active. This would indicate that the unit was specified to utilize the sync input but is not able to do so. If the SYNC LED is lit solid orange then the Model 5401A is not acting as the PTPv1 Leader clock for the Dante network and the failover mode is active. The SYNC LED lighting orange, whether solid or flashing, would typically indicate an error condition that should be resolved. The SYNC LED will light solid green when the Model 5401A is acting as the Follower clock. In this case, the unit is using another Dante device on the network to provide its timing reference. This would not be a typical situa- tion and might only occur while performing system testing or serving in a backup role. If Redundant or Redundant+Mgmt has been selected then the SYNC LED will slowly flash green if this specific Model 5401A is serving as the PTPv1 Leader clock for either the Dante primary or Dante second- ary network. The SYNC LED will slowly flash orange if this Model 5401A is serving as the PTPv1 Leader clock for the Dante primary network and its failover mode is active. This would indicate that the unit was specified to utilize the sync input but is not able to do so. If the SYNC LED is lit solid orange then the Model 5401A is not acting as the PTPv1 Leader clock for the Dante primary network and its failover mode is active. The SYNC LED lighting orange, whether solid or flash- ing, would typically indicate an error condi- tion that should be resolved. The SYNC LED will light solid green when the Model 5401A is not acting as the PTPv1 Leader clock for the Dante primary and Dante secondary networks, unless the unit is locked to another Leader clock. In this case, the unit is using another Dante device to provide the timing reference for the Dante primary network. This would not be a typical situation and might only occur while perform- ing system testing or serving in a backup role. The management webpages should be utilized to observe the Model 5401A’s com- plete sync status. Using the Home and Main webpages, the status of the Dante primary and Dante secondary interfaces, including their support for PTPv1 and PTPv2, will be displayed. Note that it’s possible that up to 30 or 40 seconds may be required for the SYNC LED to reach its final state after the Model 5401A powers up or performs a reboot (restart). Also, both the SYS and SYNC LEDs will flash red whenever the Model 5401A’s net- work configuration mode is changing. (This would be performed using the Dante Con- troller application.) After the revised network configuration has been established the SYS and SYNC LEDs will perform normally. External Lock LED An LED, labeled SYNC IN, is associated with the status of the Model 5401A’s external synchronization input. If the unit’s main clock source has been configured to utilize an ex- ternal source of sync then the LED will light green if a valid source has been connected. The SYNC IN LED will light red if a valid signal has not been connected. This would typically indicate an error condition that should be investigated. If the Model 5401A’s main clock source has not been selected to use the external sync input then the SYNC IN LED will function in a slightly different manner. It will light green whenever a valid source is connected to the external sync input. It will not light if a valid source has not been connected.

Issue 2, July 2021 Studio Technologies, Inc. Page 33 RJ45 LED Indicators On the Model 5401A’s back panel there are three RJ45 jacks that are provided for inter- facing with the unit’s three Ethernet ports. Two of the ports are typically used for Dante and the third for management functions. The Ethernet ports are labeled Dante PRI, Dante SEC, and MGMT. Associated with each RJ45 jack are two LEDs. One LED is labeled LINK and lights orange when a GigE Ethernet connection has been estab- lished with that specific port. The other LED is labeled ACT and flashes green to indicate activity, responding to Ethernet data travel- ing through the specific port. The Model 5401A’s three Ethernet ports, as a group, can be configured, using the Dante Controller application, to operate in one of four network configuration modes: Switched, Redundant, Switched+Mgmt, and Redundant+Mgmt. Details about the four network configuration modes are provided in other sections of this guide. The manner in which the LEDs associated with each RJ45 jack will light depends on the network configuration. The following sections detail the operation of the LEDs based on the specific network configuration. Switched Network Mode Dante PRI RJ45 LEDs: LINK (Orange): Off if no Ethernet signal is connected or if a 100 Mb/s Ethernet signal is connected; lit if a GigE Ethernet signal is connected. ACT (Green): Off if no data traffic; flashes to show data traffic. Dante SEC RJ45 LEDs: LINK (Orange): Off if no Ethernet signal is connected or if a 100 Mb/s Ethernet signal is connected; lit if a GigE Ethernet signal is connected. ACT (Green): Off if no data traffic; flashes to show data traffic. MGMT RJ45 LEDs: LINK (Orange): Off if no Ethernet signal is connected or if a 100 Mb/s Ethernet signal is connected; lit if a GigE Ethernet signal is connected. ACT (Green): Off if no data traffic; flashes to show data traffic. Redundant Network Mode Same as Switched. Switched+Mgmt Network Mode Dante PRI RJ45 LEDs: LINK (Orange): Off if no Ethernet signal is connected or if a 100 Mb/s Ethernet signal is connected; lit if a GigE Ethernet signal is connected. ACT (Green): Off if no data traffic; flashes to show data traffic. Dante SEC RJ45 LEDs: LINK (Orange): Off if no Ethernet signal is connected or if a 100 Mb/s Ethernet signal is connected; lit if a GigE Ethernet signal is connected. ACT (Green): Off if no data traffic; flashes to show data traffic. MGMT RJ45 LEDs: LINK (Orange): Will not light. ACT (Green): Will not light. Redundant+Mgmt Network Mode Same as Switched+Mgmt.

Model 5401A User Guide Page 34 Studio Technologies, Inc. Front-Panel Display Page Descriptions The following sections provide information about the Model 5401A’s front-panel menu pages. Additional details can be found in the Model 5401A Configuration section of this guide. Refer to Appendix D for the menu structure diagram. Row One There are five display pages associated with the top row which we’ll refer to as row one. They relate to the timing status of the as- sociated Dante network, the Model 5401A’s selected internal timing, parameters related to the sync input, and display of timing pa- rameters that can be useful for factory trou- bleshooting. Dante Sync Status Primary PTPv1: This menu page will display the PTPv1 sync status for the Dante primary interface. It will show Leader, Follower, Link Down, or Er- ror. The management webpages should be utilized to observe the Model 5401A’s com- plete sync status. Using the Home and Main webpages, the status of the Dante primary and Dante secondary interfaces, including their support for PTPv1 and PTPv2, will be displayed. Current Clock Source: This menu page will display which timing source is actively be- ing used by the Model 5401A’s circuitry. The possibilities are Internal, Internal (Failover Active), Sync Input, Dante, Dante (Failover Active), and ---. Should the text Failover Active be present it will alternate on and off as a warning of an abnormal condition. This would typically warrant intervention. Sync Input Type & Status: This display page shows two parameters. The top line will show the type of input that has been config- ured for the sync input. The possibilities are Word Clock, Video, or 10 MHz. The bottom line will show the status of the sync input circuitry. The possibilities are Locked, Unlocked, Standby, and Idle. Sync Input Termination: This menu page will display the status of a terminating imped- ance being applied to the sync input BNC jack. The two possibilities are Off and On. Phase Detector Deviation (Factory Use): This menu page will display two numbers related to how well the Model 5401A’s inter- nal logic circuitry is “locking” to an external timing reference. The information on this menu page will only be relevant if the factory has been contacted in regards to a technical issue. Row Two Row two has five front-panel menu pages that involve the management IP address and related parameters. Two are display-only and three allow changes to be made. Current Management IP Address: This menu page will show the IP address as- sociated with the Model 5401A’s internal management web server. This address can be assigned automatically using the DHCP protocol or, if a DHCP server is not available, using the IPv4 link-local protocol. (An IP ad- dress that has the format of 169.254.x.x was assigned using IPv4 link-local.) The manage- ment IP address can also be manually as- signed with a fixed or static IP address. If no Ethernet connection has been made the text Link Down will be displayed. If the Model 5401A’s network configuration in the Dante Controller application is selected for Switched or Redundant then this menu page will show the IP address that’s associ- ated with the connection made to the Model 5401A’s management RJ45 jack. If the Model 5401A’s network configuration in the Dante Controller application is select- ed for Switched+Mgmt then the IP address that is displayed will be associated with a

Issue 2, July 2021 Studio Technologies, Inc. Page 35 connection that is made to either the Dante primary or Dante secondary Ethernet interface. If the network configuration in Dante Controller has been selected for Redundant+Mgmt then the IP address that is displayed will be associated with a con- nection that is made to the Dante primary Ethernet interface. Current Management Subnet Mask Value: This menu page will show the sub- net mask value setting that is active for the management interface and associated web server. If the IP address and related network parameters were obtained by way of DHCP then this field will display an IPv4 subnet mask value in dot-decimal notation. If the IP configuration mode is selected for Auto- matic and the current IP address was ob- tained by way of link-local, then 255.255.0.0 will show. It’s also possible that the subnet mask value was manually entered as part of a fixed or static IP address setting. Management IP Configuration: This menu page allows the display and revision of the method that the Model 5401A will use to ob- tain a management IP address and related parameters. The choices are Automatic and Manual. The selected configuration impacts how the Model 5401A obtains the IP ad- dress that is used for accessing the man- agement web server and associated menu webpages. This setting has no impact on how the Model 5401A obtains IP addresses for the Dante primary and Dante secondary Ethernet interfaces. An arrow icon will display in the upper-right corner of this menu page. This indicates that the setting can be changed. If the active method is not the desired one, press the Enter pushbutton switch located on the front panel. Use the left and right arrow buttons to select the desired method. Then again press the Enter button. The entry will be stored. To cause the Model 5401A to use a new setting requires that the unit be rebooted (restarted). This can be performed using another front-panel menu page, a selection in one of the management web- pages, or by power cycling the unit. Selecting the Automatic setting causes the Model 5401A to use DHCP or, if DHCP is not available, the IPv4 link-local protocol to establish the IP address for the manage- ment port. Even if the IP address was es- tablished using link-local the DHCP protocol will remain active. In this case, approxi- mately every 30 seconds the Model 5401A’s firmware will check for the presence of a DHCP server. If one becomes available then an IP address will be requested and, when obtained, will automatically replace the IP address that was previously estab- lished by link-local. The Manual setting allows the desired IP address and related parameters to be manually entered. This can be useful when a fixed or static addressing scheme has been established. In this way, a designated IP address can be entered along with the other necessary network parameters. Note that to minimize the chance of los- ing access to the management web server, restoring the Model 5401A’s default configu- ration values will not change the currently selected IP address configuration choice. Manual Management IP Address: This menu page shows the stored IP address associated with the connection used to access the management web server. (This address has nothing to do with the IP ad- dress utilized by the Dante primary and Dante secondary Ethernet interfaces.) It will be utilized only when the manual mode has been selected for the management IP address configuration. When the IP address configuration has been selected for Auto- matic this field cannot be changed and a

Model 5401A User Guide Page 36 Studio Technologies, Inc. lock icon will show in the upper-right corner of the display. Whenever the IP address configuration is selected for Manual the manual IP address can be modified as desired. This will be indicated by a circle with arrows icon that will show in the upper-right corner of the display. To start the process of changing the manual management IP address press the Enter pushbutton switch on the front panel. An icon with a wrench and screwdriver will display to indicate that an edit is in process. Use the left and right arrow pushbutton switches to select which specific digit of the IP address number is to be modified. Press the up and down arrow pushbuttons to select the desired number. The standard dot-decimal notation is used to display and revise the IP address. Once all the desired changes have been made press the Enter button to store them. To cause the Model 5401A to use a new setting requires that the unit be rebooted (restarted). This can be performed using another front-panel menu page, using a function on a management webpage, or by power cycling the unit. Restoring the Model 5401A to its default values will not change the stored manual IP address. Manual Management Subnet Mask Value: This menu page shows the stored subnet mask value associated with the connection used to access the management web serv- er. (This value has nothing to do with the subnet mask values utilized by the Dante primary and Dante secondary ports.) It will be utilized only when the manual mode has been selected for the management IP ad- dress configuration. When the IP address configuration has been selected for Auto- matic this field cannot be changed and a lock icon will show in the upper-right corner of the display. Whenever the IP address configuration is selected for Manual the manual manage- ment subnet mask value can be modified as desired. This will be indicated by a circle with arrows icon that will show in the up- per-right corner of the display. To start the process of changing the subnet mask value press the Enter pushbutton switch on the front panel. An icon with a wrench and screwdriver will display to indicate that an edit is in process. Use the up and down arrow pushbutton switches to select the de- sired subnet mask value. Once the desired value has been selected press the Enter button to store it. To cause the Model 5401A to use a new manual management subnet mask value re- quires that the unit be rebooted (restarted). This can be performed using another front- panel menu page, using a function on a management webpage, or by power cycling the unit. Restoring the Model 5401A to its default values will not change the stored subnet mask value. Row Three Row three has a total of six menu pages. Four of the menu pages relate to the Dante primary interface with three of these allow- ing both display and configuration changes to be made. The fifth menu page allows the configuration of the Ethernet switch inte- grated circuit to be displayed. A sixth menu page allows the Dante interface to be re- booted (restarted). Dante Device Name: The Dante de- vice name is shown on this menu page. This name is unique to each device in a Dante deployment and is used as part of the Dante subscription (channel routing) process. The name can be changed from within the Dante Controller application. The text shown on this menu page is same as is shown in the upper-right corner of each Model 5401A management webpage.

Issue 2, July 2021 Studio Technologies, Inc. Page 37 Dante Primary IP Configuration: This menu page allows the display and revision of the method that the Model 5401A’s Dante interface will use to obtain the Dante prima- ry IP address and related parameters. The choices are Automatic and Manual. This setting has no impact on how the Model 5401A obtains IP addresses for the Dante secondary interface and management inter- face webpages. An arrow icon will display in the upper-right corner of this menu page. This indicates that the setting can be changed. If the ac- tive method is not the desired one, press the Enter pushbutton switch located on the front panel. Use the left and right arrow buttons to select the desired method. Then again press the Enter button. The entry will then be stored. To cause the Model 5401A to use a new setting requires that the unit be rebooted (restarted). This can be per- formed using another front-panel menu page, a selection in one of the management webpages, or by power cycling the unit. Selecting the Automatic setting causes the Model 5401A’s Dante interface to use DHCP or, if DHCP is not available, the IPv4 link-local protocol to establish the IP address used by the Dante primary inter- face. (An IP address that has the format of 169.254.x.x was assigned using IPv4 link- local.) Even if the IP address was estab- lished using link-local the DHCP protocol will remain active. In this case, the Model 5401A’s Dante interface will continue to check for the presence of a DHCP server. If one becomes available then an IP address will be requested and, when obtained, will automatically replace the IP address that was previously established by link-local. The Manual setting allows the desired Dante primary IP address and related pa- rameters to be manually entered. This can be useful when a fixed or static addressing scheme has been established. In this way, a designated IP address can be entered along with the other necessary network parameters. To cause the Model 5401A to use a re- vised Dante primary IP address configura- tion method requires that the unit’s Dante interface be rebooted (restarted). This can be performed using the reboot Dante front- panel menu page or by rebooting the entire Model 5401A. This latter action can be ac- complished using the reboot system menu page, using a function on one of the man- agement webpages, or by power cycling the Model 5401A. Note that to minimize the chance of losing access to the Dante network, restoring the Model 5401A’s default configuration values will not change the stored Dante primary IP address configuration method. Dante Primary IP Address: This menu page shows the IP address associated with the Dante primary interface. (This address has nothing to do with the IP addresses utilized by the Dante secondary and man- agement interface ports.) It can be revised only when the manual mode has been se- lected for the Dante primary IP configura- tion. When the IP address configuration has been selected for Automatic this field cannot be changed and a lock icon will show in the upper-right corner of the display. If no Ether- net connection has been made the text Link Down will be displayed. If the network configuration is selected in the Dante Controller application for Switched or Switched+Mgmt then the Dante primary IP address will be associated with a network connection made to either the primary or the secondary RJ45 jacks on the Model 5401A’s back panel. If the network configuration is selected for Redundant or Redundant+Mgmt then the Dante primary IP address will be associated with the RJ45 jack labeled PRI on the Model 5401A’s back panel.

Model 5401A User Guide Page 38 Studio Technologies, Inc. Whenever the IP address configuration is selected for Manual the manual Dante primary IP address can be modified as desired. This will be indicated by a circle with arrows icon that will show in the up- per-right corner of the display. To start the process of changing the Dante primary IP address press the Enter pushbutton switch on the front panel. An icon with a wrench and screwdriver will display to indicate that an edit is in process. Use the left and right arrow pushbutton switches to select which specific digit of the IP address number is to be modified. Press the up and down arrow pushbuttons to select the desired number. The standard dot-decimal notation is used to display and revise the Dante primary IP address. Once all the desired changes have been made press the Enter button to store them. To cause the Model 5401A to use the new Dante primary IP address setting requires that the unit’s Dante interface be rebooted (restarted). This can be performed using the reboot Dante front-panel menu page. Re- booting the entire the Model 5401A can also be utilized to cause a new Dante primary IP address to be used. This can be ac- complished using the reboot system menu page, using a function on one of the man- agement webpages, or by power cycling the Model 5401A. Restoring the Model 5401A to its default values will not change a stored Dante primary IP address. Dante Primary Subnet Mask Value: This menu page shows the stored subnet mask value associated with the Dante primary interface. (This value has nothing to do with the subnet mask values utilized by the Dante secondary or management ports.) It will be utilized only when the manual mode has been selected for the Dante primary IP address configuration. When the IP address configuration has been selected for Auto- matic this field cannot be changed and a lock icon will show in the upper-right corner of the display. Whenever the IP address configuration is selected for Manual the subnet mask value can be modified as desired. This will be indicated by a circle with arrows icon that will show in the upper-right corner of the display. To start the process of changing the subnet mask value press the Enter pushbut- ton switch on the front panel. An icon with a wrench and screwdriver will display to indicate that an edit is in process. Use the up and down arrow pushbutton switches to select the desired subnet mask value. Once the desired value has been selected press the Enter button to store it. To instruct the Model 5401A to use the new Dante subnet mask value requires that the unit’s Dante interface be rebooted (restart- ed). This can be performed using the reboot Dante front-panel menu page. Rebooting the entire Model 5401A can also be used to cause a new Dante primary subnet mask value to be used. This can be accomplished using the reboot system menu page, using a function on one of the management webpages, or by power cycling the Model 5401A. Restoring the Model 5401A to its default values will not change a stored Dante primary subnet mask value. Ethernet Switch Configuration: This menu page shows the Model 5401A’s net- work configuration as determined by a set- ting in the Dante Controller application. The term “switch” refers to an Ethernet switching and routing integrated circuit that is part of the Model 5401A’s hardware. How this integrated circuit is configured determines the how the Model 5401A’s three Ether- net ports will function. The field will show Switched, Redundant, Switched+Mgmt, or Redundant+Mgmt. It will also display Error in the unlikely event that an error has oc- curred in the Brooklyn II module that sup- ports the Model 5401A’s Dante interface.

Issue 2, July 2021 Studio Technologies, Inc. Page 39 Reboot Dante: This menu page allows the Dante interface to be rebooted (re- started). This can be useful to force the Model 5401A’s Dante interface to utilize revised Dante primary IP address and related parameter configuration changes. It can also be useful when troubleshooting a Dante network issue. An arrow icon shows in the upper-right corner of the reboot Dante menu. To start the process of rebooting the Dante interface press the Enter pushbutton on the unit’s front panel. This will lead to a confirmation page being displayed. Use the left and right arrow pushbutton switches to select the desired action. The choices are to cancel or to confirm. Press the Enter pushbutton switch to select the highlighted action. Note that if the Dante interface is rebooted it may take 20 to 60 seconds for the Model 5401A’s operation to fully restore. And during this time period the management Ethernet port will also disconnect and then reconnect. Row Four Row four contains six menu pages. Five of the pages provide information about the specific Model 5401A, including its serial number and versions of the firmware (em- bedded software) that are in use. It also in- cludes a menu page that allows the system to be rebooted (restarted). Product Name & Serial Number: This menu page shows the name of the prod- uct (Model 5401A) and the hardware se- rial number. The name and serial number, along with three MAC addresses associated with the Ethernet interfaces, are assigned at the factory and cannot be changed. Main MCU Firmware Version: This menu page shows the version number of the Model 5401A’s Main MCU firmware. This firmware can be updated using a USB flash drive. Update details are provided in the Technical Notes section of this guide. Main FPGA Firmware Version: This menu page shows the version number of the Model 5401A’s Main FPGA (field-program- mable-gate-array) firmware. This firmware can be updated using a USB flash drive. Update details are provided in the Technical Notes section of this guide. Sync FPGA Firmware Version: This menu page shows the version number Model 5401A’s internal synchronization board FPGA (field-programmable-gate-array) firmware. This firmware can be updated using a USB flash drive. Update details are provided in the Technical Notes section of this guide. Dante Product Version: This menu page shows the product version number that’s stored in and being utilized by the Dante interface. The Model 5401A’s Dante inter- face is implemented using a Brooklyn II module from Audinate. This version number is assigned by Studio Technologies as an identifier when a file is released that com- bines specific Model 5401A configuration information along with Audinate-developed Dante operating firmware. The firmware for the Model 5401A’s Dante interface can be updated by way of an Ethernet connection using the Dante Updater software applica- tion that’s provided as part of the Dante Controller software application. Reboot System: This menu page allows the Model 5401A to be rebooted (restarted). This can be useful to force the Model 5401A to utilize all revised management and Dante interface configuration changes. An arrow icon shows in the upper-right corner of the reboot Dante menu. To start the process of rebooting the Model 5401A press the Enter pushbutton on the unit’s front panel. This will lead to a confirmation page being displayed. Use the left and right arrow push-

Model 5401A User Guide Page 40 Studio Technologies, Inc. button switches to select the desired action. The choices are to cancel or to confirm. Press the Enter pushbutton switch to select the highlighted action. After performing a system reboot (restart), 20 to 60 seconds may be required for the Model 5401A’s operation to fully restore. During this time period the management Ethernet port will briefly disconnect and then reconnect. Screen Saver A “screen saver” mode will automatically activate two minutes after the last press of a front-panel pushbutton switch. When active, the screen saver mode will cause a continu- ous sequence of five menu pages to acti- vate. Each menu page will be present for about three seconds before the next menu page will display. When the screen saver mode is active pressing the Enter pushbutton switch on the front panel will cause it to stop and the current management IP address menu page to immediate display. To cause the screen saver mode to immediately start simultane- ously press the left and right arrow pushbut- ton switches on the front panel. There are five menu pages that will display when the screen saver mode is active. Details regarding the information provided in menu pages 2-5 were documented in previously sections of this guide. The menu pages consist of: 1. The Studio Technologies’ company logo graphic. 2. The product name (Model 5401A) and the Dante device name. 3. The Dante sync status. 4. The current clock source. 5. The current management IP address. Technical Notes PTPv1, PTPv2, and AES67 For clock synchronization “native” Dante utilizes version 1 of the Precision Time Protocol (PTPv1). Technically, the appli- cable standard is IEEE 1588-2002, which is what the Model 5401A supports for applica- tions that utilize both single and redundant Dante. When operating in the Redundant or Redundant+Mgmt network modes, inde- pendent PTPv1 server functionality is sup- ported, one instance provided for the Dante primary port and a second instance provid- ed for the Dante secondary port. Applications that utilize AES67 require PTP version 2 (PTPv2) as covered under the standard IEEE 1588-2008. (And following details as specified in the SMPTE ST2059-2 profile.) The Model 5401A will provide sup- port for PTPv2 if the AES67 mode has been enabled in the Dante Controller application. This is in addition to PTPv1 support; both can function simultaneously. When AES67 mode has been enabled and Redundant or Redundant+Mgmt mode is selected, then both the Model 5401A’s Dante primary and Dante secondary Ethernet interfaces will provide independent PTPv2 server functionality. (And to highlight, this is in addition to PTPv1 functionality.) In Dante-related AES67 applications the Model 5401A can provide good PTPv2 func- tionality. But the Model 5401A can’t serve as a general-purpose PTPv2 grandmaster clock. Limitations in Dante’s AES67 imple- mentation restricts Studio Technologies’ ability to adjust PTPv2 operating parame- ters, something that some applications may require. Refer to Appendix G, located at the end of the guide, for details on the default PTPv2 implementation that the Model 5401A provides.

Issue 2, July 2021 Studio Technologies, Inc. Page 41 Dante IP Addresses If the Model 5401A’s Dante interface has been configured in the Dante Controller application for Switched or Switched+Mgmt operation, by default the Model 5401A’s Dante primary Ethernet interfaces will attempt to automatically obtain an IP ad- dress and associated settings using DHCP (Dynamic Host Configuration Protocol). If a DHCP server is not detected then an IP address will automatically be assigned us- ing the link-local protocol. This protocol is known in the Microsoft® world as Automatic Private IP Addressing (APIPA). It is also sometimes referred to as auto-IP (PIPPA). Link-local will randomly assign a unique IP address in the IPv4 range of 169.254.0.1 to 169.254.255.254. In this way, multiple Dante-enabled devices will connect to- gether and automatically function, whether or not a DHCP server is active on the LAN. Even two Dante-enabled devices that are directly interconnected using an RJ45 patch cord should correctly acquire IP addresses and be able to communicate with each other. As previously discussed in this guide, using Dante Controller the Model 5401A’s Dante Ethernet IP address(es) and related network parameters can also be set for manual (fixed or static) operation. If the Model 5401A’s Dante interface has been configured in Dante Controller for Redundant or Redundant+Mgmt operation then both the Model 5401A’s Dante primary and Dante secondary Ethernet interfaces will attempt to automatically obtain IP ad- dresses and associated network settings using DHCP. If DHCP is not available then link-local IP addresses will be assigned. If automatic assignment of IP addresses is not desired each interface can be individu- ally configured using Dante Controller to use a manual (fixed or static) IP address and related network parameters. The specific IP address assigned to each of the Model 5401A’s Dante interfaces can be identified using several methods. The Dante Controller application will directly display the network parameters of the primary and, if utilized, secondary Ethernet interfaces. An- other means is to utilize the Model 5401A’s network configuration webpage to directly display the IP addresses assigned to the primary and, if utilized, secondary Ethernet ports. The Model 5401A’s front-panel menu system can also be selected to display the Dante primary IP address. Optimizing Dante Network Performance For best Dante audio-over-IP performance a network that supports VoIP QoS (voice-over- internet-protocol quality of service) capabil- ity is recommended. This can typically be implemented on virtually all contemporary managed Ethernet switches. There are even specialized switches that are optimized for entertainment-associated applications. Also, it’s recommended that IGMP snooping func- tionality on Ethernet switch ports associated with Dante devices be disabled. This can be important, allowing Dante-related multicast data traffic, including PTPv1, to be correctly supported. Refer to the Audinate website (audinate.com) for details on how to opti- mize a network for Dante applications. Management IP Address and Configuration It’s easy to determine the active IP address being used by the Model 5401A’s manage- ment Ethernet port. The most direct method is to simply watch the front-panel screens that are active in the “screen saver” mode. This mode will enable automatically two min- utes after the last press of any of the front- panel buttons. The front-panel menu system also allows the management IP address to be displayed and, if required, revised. A

Model 5401A User Guide Page 42 Studio Technologies, Inc. menu structure diagram is available in Ap- pendix D of this guide. It’s also available as a separate document on the Studio Tech- nologies website. By default, the Model 5401A’s management Ethernet interface address configuration is set for automatic. In this way, it will attempt to automatically obtain an IP address and associated settings using DHCP. If a DHCP server is not detected an IP address will automatically be assigned using the link-lo- cal protocol in the IPv4 range of 169.254.0.1 to 169.254.255.254. There are two ways that the management Ethernet IP address and related network parameters can be set to a manual (fixed or static) configuration. The first method uses the front-panel display and buttons to allow the management Eth- ernet network parameters to be viewed and revised as desired. An even easier method might be to use the network configuration webpage that is provided as part of the Model 5401A’s management webpages. Model 5401A Firmware Update Procedure It’s possible that updated versions of the three firmware (embedded software) files that are utilized by the Model 5401A’s MCU (microcontroller) and two FPGA (field- programmable-gate-array) integrated circuits will be released to add features or correct issues. Refer to the Studio Technologies’ website for the latest firmware files. The Model 5401A has the ability to load appli- cable firmware files into non-volatile memory by way of a standard USB flash drive. The Model 5401A implements a USB host func- tion and provides access by way of a type A receptacle located on the back panel. The Model 5401A updates its firmware us- ing three files. The Main MCU firmware is named M5401A.bin, the Main FPGA firm- ware is named DSMC.bit, and the Sync FPGA firmware is named CLOK.bit. The update process begins by preparing a USB flash drive. The flash drive doesn’t have to be empty (blank) but must be in the personal-computer-standard FAT32 for- mat. One, two, or all three of the firmware files can be automatically loaded at essen- tially the same time. On the flash drive’s root folder, save the desired new firmware files, ensuring that the required names are specified. The file name for the Main MCU firmware must be M5401A.bin. The file name for the Main FPGA firmware must be DSMC.bit. And the file name for the Sync FPGA firmware must be CLOK.bit. Be certain to use the eject command to ensure that the file is correctly stored on the USB flash drive. Studio Technologies will supply each firm- ware file inside a .zip archive file. While the firmware file inside of the zip file will adhere to the naming convention required by the Model 5401A, the name of the zip file itself will include the file’s version number. For ex- ample, a zip file named M5401Av1r04MCU. zip would indicate that version 1.04 of the Main MCU firmware (M5401A.bin) is con- tained within this zip file. Once the prepared USB flash drive is in- serted into the USB receptacle, located on the Model 5401A’s back panel, the Model 5401A must be powered off and then pow- ered on again. At this point the file(s) stored on the USB flash drive will automatically load. The precise steps required will be highlighted in the following paragraphs. To install one, two, or all three of the firm- ware files follow these steps: 1. Remove power from the Model 5401A. This will entail removing the AC mains power connector or removing the con- nector associated with the external source of nominal 12 volts DC. (Both must be disconnected if dual powering has been implemented.)

Issue 2, July 2021 Studio Technologies, Inc. Page 43 2. Locate the USB receptacle on the Model 5401A’s back panel. It is labeled Firmware Update. Directly adjacent to the USB receptacle is a small hole that provides visual access to a green LED indicator. 3. Insert the prepared USB flash drive into the USB receptacle. 4. Apply power to the Model 5401A. Power can be provided by connecting AC mains or a source of nominal 12 volts DC. 5. After a few seconds the Model 5401A will run a “boot loader” program that will automatically load and save the new firmware file(s) that are present on the USB flash drive. The update process can range from approximately 10 seconds to approximately 60 seconds, depending on which of the three files are going to be updated. While files are being loaded the green LED, located adjacent to the USB receptacle, will flash slowly. Once the entire loading process has complet- ed the Model 5401A will reboot (restart) using the newly saved firmware. 6. At this time the Model 5401A is function- ing with the newly loaded firmware and the USB flash drive can be removed. 7. It’s a good idea to confirm that the de- sired Model 5401A’s Main MCU, Main FPGA, and Sync FPGA firmware ver- sions are loaded and operating as expected. There are two methods for observing the Model 5401A’s firmware version numbers. The most direct is to use the front-panel display. Alternately, the System webpage from the manage- ment webpages can be utilized. Note that no harm will occur if power is ap- plied to the Model 5401A that has a USB flash drive connected that doesn’t have rel- evant files in its root folder. Upon power up the green LED, located adjacent to the USB receptacle, will flash on and off rapidly for a few seconds to indicate that a valid file has not been found. After this warning, normal operation using the unit’s existing firmware will begin. Dante Firmware Update As previously discussed in this guide, the Model 5401A implements Dante connec- tivity using the Brooklyn II module from Audinate. The Dante Controller software ap- plication can be used to determine the ver- sion of the firmware (embedded software) that resides in the Brooklyn II module. The System webpage provided by the Model 5401A’s management web server can also be used to identify the firmware version. The firmware (embedded software) residing in the Brooklyn II module can be updated using the Model 5401A’s Dante primary Eth- ernet port. Performing the update process is easily accomplished using an automated method called Dante Updater that’s includ- ed as part of the Dante Controller software application. The Dante Controller applica- tion is available, free of charge, from the Audinate website (audinate.com). The latest Model 5401A firmware file, with an extension of .dnt, is available on the Stu- dio Technologies’ website as well being part of Audinate’s product library database. The latter allows the Dante Updater software ap- plication that is included with Dante Control- ler to automatically query and, if required, update the Model 5401A’s Dante interface. Restoring Model 5401A’s Default Configuration Values A command in the System Information webpage provided by the Model 5401A’s management web server allows most of the configuration settings to be restored to their default configuration values. This can be useful but must be used with caution. Any customization made to the Model 5401A’s

Model 5401A User Guide Page 44 Studio Technologies, Inc. configuration will be lost. This can be offset in a positive way by returning the Model 5401A to a known configuration, a point that might aid in troubleshooting an issue. Refer to Appendix F for a list of the default values. Lost User Name and/or Password As is covered in detail in other sections of this guide, gaining access to the Model 5401A’s configuration menu webpages requires entering the correct user name and password. If the default entries, both of which are guest, are stored for use then they will display on the Login menu web- page. Pressing the Log In button on that webpage will then access the Main configu- ration webpage. If either or both the user name and the password have been config- ured to be something other than guest (the default) then nothing will show in the fields associated with the login menu webpage. If knowledge of the stored user name and/or password is “lost” then the Model 5401A includes a “backdoor” to allow access. But as a security measure physical access to the unit is required to utilize that access method; there is no means to access the unit via an Ethernet port without knowledge of the user name and password. The exact process of accessing the Model 5401A’s configuration webpages without knowledge of the user name and/or password is de- tailed in Appendix H, located at the end of this guide.

Issue 2, July 2021 Studio Technologies, Inc. Page 45 Specifications Applications: High-performance Leader clock for Dante audio-over-IP applications. Also supports AES67-2018 applications. In addition, provides audio tones on Dante transmitter (output) channels for general-purpose use and a word clock synchronization output. Precision Time Protocol (PTP) Support: PTPv1 (IEEE 1588-2002) for Dante; PTPv2 (IEEE 1588-2008) for AES67-2018 Timing Reference: Source: internal time base, external sync input, or via an existing Dante network, selectable Internal Time Base: Type: 24.576 MHz temperature-stabilized crystal oscillator Initial Accuracy: 1 ppm (parts-per-million) Long-Term Accuracy: 1 ppm (parts-per-million) per year Temperature Stability: ±280 ppb (parts-per-billion), 0-50 degrees C Sync Input: Compatible Sources: word clock, bi-level video, tri-level video, 10 MHz Termination: 50 ohms (10 MHz), 75 ohms (word clock or video), or high Z (unterminated), selectable Word Clock Compatibility: square wave, 5 Vpp nominal unloaded, 44.1, 48, 88.2, 96, 176.4, or 192 kHz Video Signal Compatibility: bi- or tri-level, 1 Vpp nominal into 75 ohm load 10 MHz Signal Compatibility: sine wave, 3 Vpp nominal into 50 ohm load Word Clock Output: Type: square wave Rate: 44.1, 48, 88.2, 96, 176.4, or 192 kHz Source Impedance: 75 ohms Amplitude: 5 Vpp, unterminated; 2.5 Vpp, externally terminated with 75 ohms Jitter: 0.01 UI (using internal time base) Network Audio Technology: Type: Dante audio-over-IP AES67-2018 Support: yes Dante Domain Manager™ (DDM) Support: yes Ethernet Interface Configuration: Switched, Redundant, Switched+Mgmt, or Redundant+Mgmt, selectable Clock Source: follows Model 5401A timing reference configuration Sample Rate: 44.1, 48, 88.2, 96, 176.4, or 192 kHz, selectable Bit Depth: 24 Number of Dante Transmitter (Output) Channels: 8 Number of Dante Transmitter Flows: 32 Audio Tone Generator: Type: continuous sine wave signals on Dante transmitter (output) channels Number of Channels: 8 Frequency: 1 Hz to 22 kHz, individually configurable in 1-Hz steps Amplitude: 0 to –99 dBFS, individually configurable in 1-dB steps Distortion (THD+N): <0.0001% (<–121 dB), measured at 1 kHz, –1 dBFS Network Interfaces: Qty: 3. Dante Primary, Dante Secondary, and Management Type: 1000BASE-T Gigabit Ethernet (GigE) per IEEE 802.3ab (100 Mb/s supported but not recommended for optimal performance; 10 Mb/s not supported) Ethernet Connection NIC Status LEDs: one link and one activity for each Ethernet interface Front-Panel Display: backlit LCD Front-Panel LEDs: 8, dual-color Functions: provides indication of condition of incoming AC and DC power, status of three Ethernet interfaces, status of Dante connectivity, and status of sync input Software Updating: USB flash drive supports updating of Main MCU, Main FPGA, and Sync FPGA firmware (embedded software); Dante interface updated via Ethernet interface Power Sources: AC Mains: 100 to 240 V, 50/60 Hz, 5 W maximum DC: 10 to 18 V, 0.5 A max: 110 uA maximum with 12 volts DC and AC mains present, 190 uA maximum with 18 volts DC and AC mains present

Model 5401A User Guide Page 46 Studio Technologies, Inc. Connectors: Sync Input, Word Clock Output: 2, BNC jack (female connector), per IEC 61169-8 Annex A Ethernet: 3, RJ45 jack USB: type A receptacle (used only for updating firmware) DC Input: 4-pin male XLR (pin 1 negative, pin 4 positive) AC Mains Input: 3-blade male, IEC 320 C14- compatible (mates with C13) Environmental: Operating Temperature: 0 to 50 degrees C (32 to 122 degrees F) Storage Temperature: –40 to 70 degrees C (–40 to 158 degrees F) Humidity: 5 to 95%, non-condensing Altitude: not characterized Dimensions (Overall): 19.00 inches wide (48.3 cm) 1.72 inches high (4.4 cm) 7.9 inches deep (20.1 cm) Mounting: one space (1U) in a standard 19-inch rack Weight: 3.0 pounds (1.4 kg) Specifications and information contained in this User Guide subject to change without notice.

Issue 2, July 2021 Studio Technologies, Inc. Page 47 Appendix A–Compatible Sync Input Sources The Model 5401A’s external sync input has been tested and confirmed for correct operation with the following signals: Word Clock: Square wave signal with rate of 44.1, 48, 88.2, 96, 176.4, and 192 kHz 10 MHz: Sine wave signal with an amplitude of 1 Vrms, nominal, terminated with 50 ohms Bi-Level and Tri-Level Video: See table below Video Format NTSC (“Black Burst”) PAL (“Black Burst”) 720p/50 Hz 720p/59.94 Hz 720p/60 Hz 1080psf/23.98 Hz 1080psf/24 Hz 1080i/50 Hz 1080i/59.94 Hz 1080i/60 Hz 1080p/23.98 Hz 1080p/24 Hz 1080p/25 Hz 1080p/29.97 Hz 1080p/30 Hz 1080p/50 Hz 1080p/59.94 Hz 1080p/60 Hz

Model 5401A User Guide Page 48 Studio Technologies, Inc. Appendix B–Network Configuration Examples

Issue 2, July 2021 Studio Technologies, Inc. Page 51 Appendix C–Dante Controller Network Default Configuration Values Dante Interface Default Values: Device Config, Sample Rate: 48k Device Config, Clocking, Unicast Delay Requests: Disabled Device Config, Device Latency: Latency: 1.0 msec Network Config, Switch Configuration, Current: Switched Network Config, Addresses: Obtain an IP Address Automatically (default) AES67 Config, AES67 Mode, Current: Disabled Leader Clock, Preferred Leader: Enabled Leader Clock, Enable Sync to External: Enabled

Model 5401A User Guide Page 52 Studio Technologies, Inc. Appendix D–Menu Structure

Issue 2, July 2021 Studio Technologies, Inc. Page 53 Appendix E–Screen Captures

Model 5401A User Guide Page 58 Studio Technologies, Inc. Main Menu: Main Clock Source: Internal Failover Clock Source: Dante Force Preferred Leader: Enabled Sync Input Menu: Type: Word Clock Termination: On Tone Generator Menu: Tone 1: Frequency 100 Hz, Level –21 dBFS Tone 2: Frequency 200 Hz, Level –22 dBFS Tone 3: Frequency 300 Hz, Level –23 dBFS Tone 4: Frequency 400 Hz, Level –24 dBFS Tone 5: Frequency 500 Hz, Level –25 dBFS Tone 6: Frequency 600 Hz, Level –26 dBFS Tone 7: Frequency 700 Hz, Level –27 dBFS Tone 8: Frequency 800 Hz, Level –28 dBFS Network Menu, Management Interface: IP Address Configuration: Automatic Manual IP Address: 192.168.1.26 Manual Subnet Mask: 255.255.255.0 Manual Gateway: 192.168.1.1 (Note: Using the Restore Default Settings command in the System menu does not restore these items to their default configuration values.) Access Menu, Management Login Credentials: User Name: guest Password: guest (Note: Using the Restore Default Settings command in the System menu does not restore these items to their default configuration values.) Appendix F–Model 5401A Default Configuration Values

Issue 2, July 2021 Studio Technologies, Inc. Page 59 Appendix G–PTPv2 (IEEE® 1588-2008) Default Characteristics Notes: 1. For Model 5401A PTPv2 support to be active AES67 compatibility check box must be enabled in Dante Controller application. 2. These default configuration characteristics apply to both the Dante primary and Dante secondary Ethernet interfaces. Domain: 0 Priority 1: 114 Clock Class: 248 Accuracy: Unknown (0xFE) Variance: 61536 Priority 2: 112 Unique ID: 00:1D:C1:XX:XX:XX DSCP: EF (46)

Model 5401A User Guide Page 60 Studio Technologies, Inc. Appendix H–Accessing the Unit when User Name and/or Password are Not Known Follow this procedure to access the Configuration menu webpages if the user name and/or password is not known. 1. Remove power from the Model 5401A. 2. Press and hold the left arrow and Enter buttons. 3. While continuing to hold the two buttons apply AC Mains or 12 volts DC power. 4. Continue to hold the two buttons and allow the Model 5401A to start. The Status LEDs on the front panel will first light green then light red in their start-up sequence. 5. Once the Status LEDs have completed their start-up sequence release the two buttons. 6. Use a web browser to access the Model 5401A’s Configuration menu webpages. The management port’s IP address to use is shown in the current management IP address page on the front-panel display. Pressing the Enter button will cause the current manage- ment IP address page to immediately show on the front-panel display. 7. From the Home webpage select the Login webpage tab. Leave the user name and pass- word fields empty and click the Log In button. This will allow access to the Configuration menu selections. At this point your web browser should display the Model 5401A’s Home webpage. 8. Navigate to the Access menu. From this webpage you will be able to view the stored user name. You will not be able to view the previously saved password. Enter and confirm a new password. Henceforth, to access the Model 5401A’s Configuration menu will require the use of the stored user name and password.