Configuration
RFI-148 250W VHF Paging Transmitter User Manual
Page 15 of 43
TRANSMIT ON
FAULT
LOW POWER
HIGH VSWR
SERIAL/ETHERNET
POWER
25
250
125
TX POWER (W)
Figure 4: Front panel display
3.7 LIU Interface
The LIU interface is a DC-37 female connector at the rear of the paging transmitter. The LIU interface has
the following connections:
Nine digital inputs:
Frequency Select 1
Frequency Select 2
Frequency Select 3
Frequency Select 4
Protocol Select
Hardware PTT
Tx Data L-bit
Tx Data H-bit
Transmit Clock
Fourteen alarm outputs:
Power Supply Alarm
Reference Out-of-Lock Alarm
Reference Switchover Alarm
High Output Power Alarm
Low Output Power Alarm
High VSWR Alarm
High Temperature Alarm
Fan Failure Alarm
Exciter Out-of-Lock Alarm
Combined Alarm