User's Manual Part 5
!(*+)
3 Adjust the output level at the microphone to approximately 80% deviation
(±4kHz for wide band or ±2kHz for narrow band).
,
Under some conditions, the microphone may pick up excessive background noise. In
this situation, the output can be reduced using
either of the procedures described
below:
1 Change the value of R12 from 10kΩ to 47kΩ (refer to the circuit diagram). This
will result in a 10dB output reduction.
2 Fit a 2K2 pot parallel with the microphone element.
Adjust the output level to suit.