Appendix A Technical Specifications
RFI-148 250W VHF Paging Transmitter User Manual
Page 26 of 43
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
Spare Alarm 1
Spare Alarm 2
Spare Alarm 3
Spare Alarm 4
Input Voltage
DC: 20 V to 31.2 V
Typical Current Draw at 24
V DC.
Fans off:
Idle: 0.3 A
25 W: 7.0 A
100 W: 12.5 A
250 W: 20.3 A
Fans on:
Idle: 0.6 A
25 W: 7.4 A
100 W: 13.1 A
250 W: 20.9 A
Connectors
Power: Terminal Block
Main Serial Port (Rear): DE-9 RS-232 Male (DTE)
Auxiliary Serial Port (Front): DE-9 RS-232 Female (DCE)
LIU Interface: DC-37 Female
Ethernet: RJ45
RF Output: N-type female 50 Ω
Sniffer Port Output: BNC female 50 Ω
External Reference Input: BNC female
Table 4: RFI-148 250 Specifications
A.3 Serial Connectors
A.3.1 Main Serial Port (Rear)
Pin
Function
Direction
1
DCD
Input
2
RxD
Input