Sierra 200 Microwave Radio Interface Board

Microwave Radio Interface Board

This board can be configured to drive a microwave radio that requires balanced audio

and E & M signaling.

Modular jack pin outs

Pin Use

1 Balanced Tx audio out (600 Ohms)

2 Balanced Tx audio out (600 Ohms)

3 PTT "M" signaling

4 Ground

5 Negative voltage input for PTT keying circuit (nomially -24v)

6 COR input, active low

7 Balanced Rx audio input (600 Ohms)

8 Balanced Rx audio input (600 Ohms)