Level Adjustment; Microphone Level; Radio Input Level - AOR ARD9900 Operating Manual

Level Adjustment

Microphone Level

The microphone level has been properly adjusted at the factory with the provided
microphone. Therefore, no further adjustment is needed for normal operation.
If you wish to use your own microphone rather than the included one, you will need to
wire your microphone connector to match the pins of the ARD9900, and then adjust the
microphone level as described in the following steps:
1. Power off the ARD9900.
2. Connect your microphone to the Microphone connector of the ARD9900.
3. Set the mode switch to [10101] (digital mode.)
4. Set the CHANNEL selector to [0].
5. Press and hold the TX switch, and power on the ARD9900. The STA LED starts
blinking indicating the ARD9900 is in the microphone level adjustment mode.
6. While holding the PTT switch of the microphone, speak into microphone normally.
7. Slowly turn the [CHANNEL] selector clockwise until the overload indicator flashes
occasionally, with the peaks of your voice signal.
8. Press the TX switch to set the digital voice level.
9. Release the PTT switch and set the mode switch to [~] (analog mode).
10. While holding the PTT switch of the microphone, speak into microphone normally.
11. While monitoring your analog voice signal with a receiver, slowly turn the
[CHANNEL] selector clockwise until the same amount of voice level as in the
digitali mode is obtained.
12. Press the TX switch to set the analog voice level.
13. Power off the ARD9900 to complete the microphone level setting process.

Radio Input Level

Perform the following steps to adjust the radio input level of your radio equipment:
1. Connect the microphone to the ARD9900, and then connect the ARD9900 to your
radio equipment. Finally, Connect the ARD9900 to a power supply.
2. Turn the output level adjustment on the bottom of the ARD9900 fully
counterclockwise.
3. Turn the power on to the ARD9900.
4. Turn the power on to your radio equipment.
5. Set the mode switch to [10101] (digital mode.)
6. Press the [PTT] switch of the microphone to transmit from the radio equipment.
7. Adjust the microphone gain of the radio equipment until the ALC function just
activates.
8. If the microphone gain is too low, readjust the output level on the bottom of the
ARD9900.
9. In case the microphone gain is still too low after adjustment, turn off the ARD9900.
Remove the top cover of the ARD9900, and set the output level setting jumper to
[2-3] (high level).
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