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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
