Pin # Signal Type Function Note
21 AUX RX Output Aux Rx Analog Signal – Unbalanced
22 GND GND
23** AUX TX Input/
Output
Aux Tx Analog Signal – 600 Ohm Unbal-
anced
24 PL - Input n/a Analog Signal – 600 Ohm Balanced
25** Gen TX – Input Gen TX Data- Analog Signal – 600 Ohm Balanced
26 Aux In 1 Input Ext Failsoft Pull To Ground To Activate
27 Aux In 3 Input Tx Inhibit Pull To Ground To Activate
28 Aux In 5 Input External PTT Pull To Ground To Activate
29 Aux In 7 Input Rx Inhibit Pull To Ground To Activate
30 Aux In 9 + Input Opto-Isolated In - Current flow to
Activate
31 Aux In 10 + Input Opto-Isolated In - Current flow to
Activate
32 Aux In 11 + Input Opto-Isolated In - Current flow to
Activate
33 Aux In 12 + Input Opto-Isolated In - Current flow to
Activate
34 GND GND
35 Aux In 14 Input For future use Pull To Ground To Activate
36 Aux Out 1 Output Failsoft Indicate Low Impedance to Ground When
Active
37 Aux Out 3 Output Low Impedance to Ground When
Active
38 Aux Out 5 Output Low Impedance to Ground When
Active
39 Aux Out Relay 7
N.O.
Output RD STAT - Receiver Active Form Relay A Closed When Active
40 Aux Out Relay 8
N.O.
Output Form Relay A Closed When Active
41 Aux Out Relay 9
N.O.
Output Form Relay A Closed When Active
42 Aux Out Relay 10
N.O.
Output Form Relay A Closed When Active
43 GND GND
44 GND GND
45 RSTAT Output RSTAT 0 Volts When Inactive / +5 Volts
when Active
46 GND GND
47 TX DATA +
48 GND GND
MN003286A01-E
Chapter 3: GTR 8000 Base Radio Installation
116
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