SABER ACCESSORY CONNECTOR PINOUT (looking the back of the radio):

(.)
1 2 3
4 5 6
7 8 9
10 11 12

The () is ground around remote antenna centre pin.

1 EXT SPKR+
2 EXT SPKR-
3 DATA
4 EXT MIC
5 /WE
6 BUSY
7 OPT SEL*
8 OPT B+
9 KEY
10 KEYLOAD
11 DVP CLK/AUX TX
12

* The OPT SEL pin follows the following table:

All Internal, STD Operation 5VDC
EXT MIC and SPKR, STD ANT 1.24VDC
EXT MIC, SPKR and ANT 2.5VDC
EXT ANT ONLY 3.74VDC


MfG

Frank