Here are some signal images captured on an Oscilloscope
RX-
(JP7)
TX
-(JP6)
Noise without signal (JP7)
Here is a list of the jumpers on the board and their settings:
Jumper Description Table
Bypass Pad
ON
OFF
Description
J1
X
Disable DC blocking capacitor on Radio RX audio
J1
X
Enable DC blocking capacitor on Radio RX audio
JP1
X
Bypass R7
JP1
X
Enable R7, this allows you to reduce the RX signal coming from
the radio so it won’t oversaturate and clip the signal.
J2
X
Bypass R32 (10K variable resistor)
J2
X
Enable R32 (10K variable resistor) for adjusting TX signal
strength
J7
X
Disable DC blocking capacitor on Radio TX audio
J7
X
Enable DC blocking capacitor on Radio TX audio
