AOR ARD9000 Quick Start Manual

carefully reading may make your start into Digital-Voice much easier CONNECTION: • In general it is recommended to connect the ARD9000 to a separate power supply, other than the one used for the radio. However, attempts have shown that it does not necessarily lead to complications if the DC power is taken from the same power supply. We managed to use the ARD9000 and radio connected to the same supply without recognizeable problems - however, it may vary from setup to setup and you have to check locally – if not working, better step back to separate power-supplies for radio and ARD9000. Switched-power-supplies seem to be mostly causing trouble and are not recommended to be used • Wiring the ARD9000 <> radio cable should be taken from the AOR manual. In case your radio does not offer a PTT-L pin, you have to shortcut this one with GND. Shielded cable as well as a good frame ground between both units are necessary • Usage of an external speaker, connected to the speaker-out connector, makes listening more pleasantly TRX SETTINGS: • TX output should not exceed 50 % of the maximum setting to avoid damage of your final transistors. The Multi-Carrier-Digital-Signal (36 carriers) puts your final transistors under stress in maximum power output • AGC setting should be FAST. Minimal required SSB bandwidth is 2.4 kHz - not to be limited by internal filter settings or build-in DSP units • ALC readout should not exceed 60 % of max. level. Adjusting the max. ALC level should be done by MIC-gain (TX side) We strongly recommend to use the provided speaker-microphone during your first test- contacts. None of the factory set potentiometer settings, located on the underside of the device, should be changed. Any adaptation of the work settings assumes experiences in Digital-Voice as well as a co-hearing receiver or experienced test partner. Attention especially the digital output setting would have to be carried out very precise. Your ARD9000 has been properly adjusted at the factory !! DO NOT TRY TO "IMPROVE" THINGS WHICH ARE NOT NEEDED !!

transmission (Status-LED = red) issued by 2-times press of the PTT, while in mode 0-2 (PTT-A) While in mode 3-9 (PTT-B) you always start a digital transmission with the first press of PTT. Switching back to analog (if required) is done by pressing PTT twice. Incoming Digital signals will always be decoded, regardless of the actually selected mode (eg: if in analog and somebody calling digital). Adjustment of re ceiver volume: • Over-LED blinking = audio too low • Over-LED always light = audio too high • Over-LED off = correct setting • Adjusting the digital-audio RX level (RX only) has to be done using the volume knob of the ARD9000, afterwards. The volume knob of the ARD9000 only changes digital RX volume and does not have any function during analog reception (by-passed in analog) DIGITAL IN REAL: • While in Digital-Mode, every transmission is initiated by a Sync-Header. The Sync-Header has the advantage to compensate -125 Hz to +125 Hz frequency offset. The actual length of the Sync-Header differs from mode to mode (for example Mode 0 = 1.6 sec, Mode 5 = 1 sec) During the transmission of a Sync-Burst, better do not speak, otherwise your QSO-partner could have a problem to recognize the digital header <==> our experience • AOR states a "silence" is already ensured by buffering (delaying) any speech at the beginning of the transmission. • In SSB you will easily recognize the ending of the Sync-Header by watching your ALC-meter (maximum peak). SUMMARY: • Digital-Voice is surely not a Plug & Play mode. Nevertheless, if you are ready to obey the given hints, there should be nothing in way of a trouble-free entrance to a successful start in Digital-Voice • All these experiences were determined in hours of radio-to-radio connections. Digital-Voice is simply great and today we would not like to miss this mode.... ...wishing you fun and a good start into Digital -Voice e Mike, DB1JAW and Michael, DK5MH DB1JAW, Mike Weiler - [email protected]