USER MANUAL FOR HARDWARE REV 1.0
06-JUN-2019
PAGE 8
3.2.6
OUTPUT AUDIO ADJUST
The output audio adjust is used to adjust the amplitude of the volume coming from the repeater board.
This is an multi
turn, 10kΩ potentiometer, multiple turns are required to effect a large change in
amplitude, while fractional turns yield fine resolution adjustments.
This function is used to adjust the amplitude of the repeated audio being sent to your transmitter radio.
This output amplitude should be adjusted per the transmitter radio specifications.
To restore the default audio position from the factory, this potentiometer should be rotated fully
counter clock-wise until it clicks. Note some parts have a very soft click, if you have one of these, ten
full turns CCW will ensure it is set correctly.
When adjusting audio output, we suggest to only adjust the RGAIN potentiometer and leave this
potentiometer at the default position.
3.3
BUILT-IN AUDIO CODEC
The system contains a
which provides stereo input and output capability so
you won’t require a USB sound card to have receive audio capability.
The stereo audio is split into 2 mono channels, this board uses 1, it uses the RIGHT audio channel only.