Input Level From Radio - AOR ARD9000MK2 Instruction Manual

3. Press the PTT switch on the supplied speaker-microphone and speak
normally into the speaker-microphone.
In case the OVERLOAD LED is not lit, it means that the microphone's
"MIC-IN" level has not been set properly. Refer to the
previous "Microphone level" section to correct this level first.
4. Adjust microphone gain control on the radio transceiver to suitable level.
It is recommended that you adjust the level so that the ALC function is
activated. If the ALC function activates too much, it might create audio
distortion and as a result, the communication link with the distant
station may be broken.
5. Adjust the output level pot on the bottom side of the ARD9000MK2
when the microphone gain control on the radio transceiver does not
adjust to provide a sufficient level.

Input Level from Radio

Although the factory setting should work with most transceivers (12 o'clock
position), it is possible to adjust the audio input level manually. This level
must be correctly set to enable effective operation with your transceiver.
If, and only if you are unable to achieve the correct level, then adjust the
input level pot "SP-IN" on the bottom of the ARD9000MK2:
Apply adjustments by observing the OVERLOAD LED as follows:
LED flashing
LED off
LED always on
Input level too low
Input level optimal
Input level too high
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