Expansion Card Interface - XIEGU G90 Operation Manual

CE-19 expansion adapter interface diagram
PTT CON PTT signal / BAND signal output port. The PTT signal of this port is completely isolated from the radio.
TO XPA125B XPA12B dedicated interface.
AF CON Audio input/output port. The audio output from this port is direct demodulated output with no filtering applied.
DATA CON Data output port in NFM mode. The two terminals of this port are in parallel and both output the same signal.
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