Operating instructions

Page 8 RF Technology R350/R500
2 RECEIVER INTERNAL JUMPER OPTIONS 2.7 JP7/8/9 Direct Output COS
2.7 JP7, JP8, JP9: Direct Output COS (JP4 2-3)
In this arrangement, the COS signal is taken via the separate COS+ and COS-
outputs, either with free (floating) output or with +12Vdc pull-up.
Condition JP7 JP8 JP9
+12 Vdc Direct Output 2-3 OFF OFF
Free Switch Output 1-2 OFF OFF
2.8 JP11 EPROM Type
Condition Position
27C256 2-3 *
27C64 1-2
2.9 JP13: Squelch Defeat (pcb 30/9132/0002 or later)
Normal squelch can be defeated with an active low signal at DB-25 pin 19.
Condition Position
Squelch operation normal 1-2 *
Squelch Defeat 2-3
2.10 JP19: LED Alarm o/p (pcb 30/9132/0002 or later)
The LED alarm can be brought out to DB-25 pin 7 for ATI
Condition Position
No Alarm Output 1-2 *
Alarm LED connect to DB-25 pin 7 2-3