Appendix A Technical Specifications
RFI-148 250W VHF Paging Transmitter User Manual
Page 27 of 43
3
TxD
Output
4
DTR
Output
5
GND
6
N/A
7
RTS
Output
8
CTS
Input
9
N/A
Table 5: Back Panel Connector Pin Out
A.3.2 Auxiliary Serial Port (Front)
Pin
Function
Direction
1
N/A
2
RxD
Output
3
TxD
Input
4
N/A
5
GND
6
N/A
7
N/A
8
N/A
9
N/A
Table 6: Front Connector Pin Out
A.4 LIU Interface
Pin
Function
Direction
1
Protocol Select
Input
2
Reference Switchover Alarm
Output
3
Spare Alarm 1
Output
4
Spare Alarm 2
Output
5
Frequency Select 4
Input
6
Frequency Select 3
Input
7
Frequency Select 2
Input
8
Frequency Select 1
Input
9
GND
10
GND
11
Hardware PTT
Input
