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APPENDIX A – DB15 RADIO CONNECTOR
Pin # Label Description
1 Power +13.5V 12 - 16V DC input
9 CAT IN Control port input
2 CAT OUT Control port output
10 SQL1 Level squelch input
3 SQL2 Impedance squelch input
11 PTT PTT output "open collector"
4 CW CW output "open collector"
12 AUX reserved
5 FSK FSK output "open collector"
13 AUDIO OUT S Radio AUDIO input signal
6 AUDIO OUT GND Radio AUDIO input ground
14 AUDIO IN MAIN S Radio AUDIO output signal main receiver
7 AUDIO IN MAIN G Radio AUDIO output ground
15 N/A Not connected
8 N/A Not connected
SHELL GND Radio and power GND
20
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