Section 5. Installation
5-19
Connections to a Motorola GR300/GR500 Repeater Station
For:
Zetron Model 37-MAX
To:
Motorola GR300/GR500 Repeater Station
Using:
709-7394
37-MAX End
Function
J1
pin#
Wire
Color
Radio End
Connection/Notes
RECEIVE RADIO
+12 volts DC
1
RED
AUX pin 13, Switched A+
Ground
2
BLACK
AUX pin 7, Ground
Discriminator Input
3
WHITE
AUX pin 11, Disc. Audio
Ground
4
BRAID
No connection
Ground (spare)
6
BROWN
AUX pin 9, Emergency Alert
COR Input
9
YELLOW
AUX pin 8, CSQ Detect
TRANSMIT RADIO
Ground
2
BLACK
AUX pin 7, Ground
Ground
4
BRAID
No connection
TX Audio Output
5
BLUE
AUX pin 2, MIC Audio
PTT Output
7
ORANGE
AUX pin 3, MIC PTT
Ground
8
BROWN
AUX pin 9, Emergency Alert
CTCSS/DCS Encode
10
GREEN
AUX pin 5, Flat TX Audio
Radius GM300 Radio Configuration
1. On both Accessory Connectors, a black wire jumper connects pins 15 (Internal Speaker)
and 16 (External Speaker). This enables the Internal Speaker in the radios.
2. Set the Radius GM300 radio jumpers as follows:
JU551 = Position A, Flat, Unmuted Discriminator Audio
JU651 = Position A, TX Audio Gain selection
JU701 = Position B, Flat TX Audio Limiter Bypass (16 channel radios only)
3. Use the RSS software to program accessory connectors on both radios as shown:
ACCESSORY CONNECTOR CONFIG
INT Accessory: None
EXT Accessory: General I/O
Custom: Y
PIN#
DESCRIPTION
DATA DIR
DEBOUNCE
ACT LEVEL
4
NULL 2
Output No
High
6
NULL 1
Input
No
Low
8
CSQ Detect
Output No
Low
9
NULL 1
Input
No
High
12
NULL 1
Input
No
Low
14
NULL 1
Input
No
Low
Summary of Contents for 37-MAX
Page 72: ...Section 6 Repair 6 6 MODEL 37 MAX REPEATER PAL 702 9808A Schematic 1 3...
Page 73: ...Section 6 Repair 6 7 2 3...
Page 74: ...Section 6 Repair 6 8 3 3...
Page 75: ...Section 6 Repair 6 9 MODEL 37 MAX REPEATER PAL 702 9808A Silkscreen...
Page 76: ...APPENDIX A PROGRAMMING LOG A 1 OVERVIEW A 1 SYSTEM PROGRAMMING A 2 USER PROGRAMMING A 3...
