ZETRON 025-9581M, Installation And Maintenance Manual

Page: 180 / 196

Appendix C: Using a Model 620x in a Model 26-based System
180 025-9581M
• In the Station Configuration Menu of the Model 620x programming, the unit must
have its Communications Mode set for Trunked with the appropriate polarity for
channel grant.
• Set jumper JP5 (FFSK Output Range) to the “ RAD ” position, if FFSK transmit
levels cannot be set high enough, move it to the “ TEL ” position and try again
Connections to Wire-line
The material shown in the following sub topics is taken from the Model 6 manual.
Basic 2-wire Interface
M6 Connection Description
J4-pin 7 Ground
J4-pin 8 PTT
J4-pin 9 TX Audio -
J4-pin 11 TX Audio +
J5-pin 1 COR (Channel Grant)
J5-pin 3 RX Audio +
J5-pin 4 RX Audio -
11
9
1
11
9
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
SW-2
SW-1
Primary Model 6
J4
J3
11
9
1
11
9
J4
J3
Secondary Model 6
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
SW-2
SW-1
To a wireline
TX/RX pair
Unit Address = 5
Unit Address = 517
PA Audio ComB
TX & 2W RX Audio & FFSK
TX & 2W RX Audio & FFSK
PA Busy
PA Audio ComA
PA
Basic 2-Wire System