AOR ARD9000 User manual

Quick-Start-Guide for AOR ARD9000
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 !!

Mutual switching between DIGITAL transmission (Status-LED = orange) and ANALOG
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:
•O er LED blinking = audio too low
•O er LED always light = audio too high
•O er 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 - [e-mail]