Telecast Adder 161 Manuals

Telecast Fiber Systems, Inc. 102 Grove Street Worcester, MA 01605 Tel: 508-754-4858 Fax: 508-752-1520 www.telecast-fiber.com Adder™ 161 Audio Multiplexer Instruction Manual Adder™ 161 ii Telecast Fiber Systems Telecast Adder™ 161 Table of Contents Introduction 1 Installation 1 Unpacking 1 Installation of Rack Mount Units 2 Line Power 2 Fiber and Coaxial Cable Runs 2 Transmitter Setup Procedure 3 Audio Signal Setup 3 Optimizing S/N Ratios 4 Receiver Setup Procedure 4 Optical Connections 6 Electrical Connections 7 Audio Connections 7 Digital Connections 8 48 VDC Phantom Power 9 Line Power Connection 9 Input Power Fuse 9 Battery Charging 10 Panel Indicators 10 Powering Up 11 Theory of Operation 11 Digital I/O Circuits, Data Connectors 1 and 2 12 Digital I/O Circuits, Data Connectors 3 and 4 12 Audio I/O Circuits, Audio Inputs 12 Audio I/O Circuits, Audio Outputs 15 Optical Outputs 15 Main Curcuits Explained 16 Accessory List 16 Troubleshooting 17 Specifications 18 Repair 19 Warranty 20 iii Adder™ 161 iv Figure 1. Installing the Rack Mount Adapters 2 Figure 2. TX Audio Setup Controls: Input Gain 4 Figure 3. RX Audio Setup Controls 4 Figure 4. Transmitter Main Circuit Board 5 Figure 5. Receiver Main Circuit Board 6 Figure 6. ST Optical Connectors, Rear Panel 7 Figure 7. XLR Connectors, Rear Panel 7 Figure 8. DB-9 Connectors, TX and RX, Rear Panel 8 Figure 9. Power Connector and Fuse Locations 9 Figure 10. TX and RX, Front Panel 10 Figure 11. Electronic Block Diagram 11 Figure 12. TX Digital Input Circuit (Connectors 1 & 2 only) 12 Figure 13. RX Digital Output Circuit (Connectors 1 & 2 only) 13 Figure 14. TX Audio Input Stage 14 Figure 15. Audio Output Circuit 15 Figure 16. Battery Charger Block Diagram 16 List of Figures List of Tables Table 1. Maximum Fiber Lengths 2 Table 2. Input Signal Levels 3 Table 3. XLR Audio I/O Cable Connections 7 Table 4. Digital Cable Connections 8 Table 5. Power Connections 9 Table 6. Output Signal Levels 15 Table 7. Adder 161 Main Circuits 16