User's Manual

Technical Specifications
RFI-148 & RFI-900 High Output Power Paging Transmitters User Manual Page 61 of 134
A.4 LIU Interface
The LIU interface functions vary depending on the product code (see Appendix F) and the build revision
(Exciter/Non-exciter).
LIU DB37 Port Function
Available LIU
Cables
DB37
Pin
RFI-148 Exciter-
based build
RFI-148 Non-exciter-based build and all
RFI-900
Direction
148M116F
20 core
cable
Individual
Wire Label
148M116H
20 core
cable
Individual
Wire Label
1
Protocol Select
Protocol Select
Input
PRO
PRO
2
Alarm 3
Alarm 3
Output
ALM3
ALM3
3
Alarm 10
Alarm 10
Output
nc
ALM10
4
Alarm 11
Alarm 11 OR Hot Standby “PHSB
MISSING”
Output
nc
nc
5
Frequency Select 4
Frequency Select 4 OR Analog Mode
“Balance Audio + input”
Input
nc
nc
6
Frequency Select 3
Frequency Select 3 OR Analog Mode
“Balance Audio - input”
Input
nc
CH3
7
Frequency Select 2
Frequency Select 2
Input
CH2
CH2
8
Frequency Select 1
Frequency Select 1
Input
CH1
CH1
9
GND
GND
Output
GND
nc
10
GND
GND
Output
GND
nc
11
Hardware PTT
Hardware PTT
Input
PTT
PTT
12
Combined Alarm
Combined Alarm
Output
COMB
COMB
13
Auxiliary Input 2
Auxiliary Input 1
9
OR Analog Build
“Digital/Analog Mode Select”
9
Input
nc
nc
14
Alarm 1
Alarm 1
Output
ALM1
ALM1
15
Tx Data L-bit
Tx Data L-bit
Input
LB
LB
16
Tx Data H-bit
Tx Data H-bit
Input
HB
HB
17
LIU Detect
LIU Detect OR Hot Standby “Can Go
Active”
Input
nc
nc
18
Tx Data Clock
Tx Data Clock
Input
CLK
CLK
19
GND
GND
Output
GND
GND
20
Alarm 2
Alarm 2
Output
ALM2
ALM2
21
Alarm 7
Alarm 7
Output
ALM7
ALM7
22
Alarm 4
Alarm 4
Output
ALM4
ALM4
23
Alarm 12
Alarm 12 OR Hot Standby “IN
STANDBY”
Output
nc
nc
24
Alarm 13
Alarm 13 OR Hot Standby “IS
PRIMARY”
Output
nc
nc
25
Auxiliary Input 4
GND
Build
dependant
10
nc
nc
26
Alarm 9
Alarm 9
Output
ALM9
ALM9
27
Auxiliary Input 3
Auxiliary Input 2
Input
nc
nc
28
Auxiliary Input 1
GND
Build
dependant
10
nc
nc
29
Alarm 5
Alarm 5
Output
ALM5
ALM5
9
RFI-148 only. Not connected for the RFI-900
10
Input for Exciter build and Output for Non-exciter build