Specifications

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APPENDIX A – DB37 RADIO CONNECTOR
Pin # Label Description
1 N/C No contact
20 RS232 RTS RS232 radio port RTS output
2 RS232 CTS RS232 radio port CTS input
21 IF-FIF iface matrix - used for configuring desired levels for radio control interface
3 IF IN iface matrix - used for configuring desired levels for radio control interface
22 FIF IN iface matrix - used for configuring desired levels for radio control interface
4 RS-TTL OUT iface matrix - used for configuring desired levels for radio control interface
23 FILTER OUT iface matrix - used for configuring desired levels for radio control interface
5 CI-V IN iface matrix - used for configuring desired levels for radio control interface
24 RS232 IN iface matrix - used for configuring desired levels for radio control interface
6 CI-V OUT CI-V bus output "open collector"
25 RS232 OUT RS232 TXD output
7 FIF OUT FIF-232 TXD output "TTL"
26 IF OUT IF-232 TXD output "TTL"
8 FILTER IN RXD input for all interfaces
27 PTT1 PTT1 output "open collector" generally used as all mode front panel MIC PTT
9 PTT2 PTT2 output "open collector" generally used as rear panel digital modes PTT
28 CW OUT CW output "open collector"
10 PULL UP +5V through a 10K resistor
29 FSK OUT FSK output "open collector"
11 FSW IN Hand Mic PTT input, N/A at RADIO2
30 MIC #1 RJ45 Microphone jack pin #1, N/A at RADIO2
12 MIC #2 RJ45 Microphone jack pin #2, N/A at RADIO2
31 MIC #3 RJ45 Microphone jack pin #3, N/A at RADIO2
13 MIC #4 RJ45 Microphone jack pin #4, N/A at RADIO2
32 MIC #5 RJ45 Microphone jack pin #5, N/A at RADIO2
14 MIC #6 RJ45 Microphone jack pin #6, N/A at RADIO2
33 MIC #7 RJ45 Microphone jack pin #7, N/A at RADIO2
15 MIC #8 RJ45 Microphone jack pin #8, N/A at RADIO2
34 MIC GND Microphone ground, N/A at RADIO2
16 MIC Microphone signal, N/A at RADIO2
35 RADIO MIC IN GND Radio MIC ground
17 RADIO MIC IN Radio MIC signal
36 RADIO AF IN GND Radio AUDIO input ground
18 RADIO AF IN Radio AUDIO input signal
37 RADIO AF OUT GND Radio AUDIO output ground
19 RADIO AF OUT Radio AUDIO output signal
SHELL GND Radio and power GND
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