Radio Input Level - AOR ARD9900 Instruction Manual

1. Connect your microphone to the Microphone connector on the ARD9900.
(Note: The microphone cable to the radio MUST be unplugged at this time.)
2. Select the mode switch (i) to the digital [10101] position.
3. Select the 0 (zero) transmitting channel [CHAN].
4. Turn ON the ARD9900 while pressing the TX switch. The status LED will blink orange
indicating the ARD9900 is now in the microphone level-adjusting mode.
5. Now speak into the microphone whilst pressing PTT button. Rotate the transmitting
channel [CHAN] control clockwise until the [OVER] LED is lit on speech peaks.
6. After you have chosen the appropriate microphone level, press TX switch while pressing
PTT button. The TX LED will illuminate orange and the new microphone level will have
been memorised.
7. Release the PTT button and select Mode switch to analogue (~) position.
8. The microphone level adjustment in Analogue mode is not normally required however, if
the audio signal level is weak at the distant station, you can carry out the same process
from 1 to 4 above even though it is for analogue mode. Pressing TX switch while pressing
the PTT button will confirm the new setting as before.
Turn the power OFF on the ARD9900 to terminate the microphone level-adjusting mode.

Radio Input Level

Perform the following steps to obtain the correct level of input for your radio equipment:
connect the microphone to the ARD9900, and then connect the ARD9900 to your radio
equipment. Finally, Connect the ARD9900 to a power supply and turn the output level
adjustment on the bottom of the ARD9900 fully counter clockwise. Now:
1. Turn the power on to the ARD9900.
2. Turn the power on to your radio equipment.
3. Set the mode switch to [10101] (digital mode).
4. Press the [PTT] switch of the microphone to transmit from the radio equipment.
5. Adjust the microphone gain of the radio equipment until the ALC function just activates.
6. If the microphone gain is too low, readjust the output level on the bottom of the
ARD9900 (See page 8 for adjustment location).
7. If the microphone gain is still too low after adjustment, turn off the ARD9900, remove the
top cover and set the output level setting jumper (JP 10) to the high level position [2-3]
and repeat the above procedure (See page 9 for jumper position).