User's Manual

Selex ES S.p.A.
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by Selex ES S.p.A. in writing
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8.1.2 4 Lines Interface module – LIF
The "4 Lines Interface” (LIF) module is the module that is able to manage up to 4 lines with
4W interface + (E&M). This module is equipped with devices for numerical computation
(DSP, FPGA) and control (microprocessor) combined with the electrical interfaces for the 4
wires lines.
The “Line Interface” (LIF) module is also able to manage redounded links over the 4 wires
interfaces.
4 wires interfaces are used by the device to connect this Radio Base Station to up to other 4
Radio Base Stations to build a Simulcast network.
The front panel is provided with bi-color leds to help in troubleshooting the system. The table
below describes the meaning of the leds:
LED
Color
Label
Description
1
Green
Line 1 RX
Line 1 on RX
Red
Line 1 TX
Line 1 on TX
2
Green
Line 2 RX
Line 2 on RX
Red
Line 2 TX
Line 2 on TX
3
Green
Line 3 RX
Line 3 on RX
Red
Line 3 TX
Line 3 on TX
4
Green
Line 4 RX
Line 4 on RX
Red
Line 4 TX
Line 4 on TX
5
Green
Status1
Red
DATA bus fail
failure MTCH of DSP
6
Green
Status2
Red
Logic fail
µP and DSP not communicate
7
Green
CTRL bus busy
Activity on Control Bus
Red
CTRL bus fail
failure of BUS µP
8
Green
Upload
Ongoing download code
Red
Upload Fail
Download code KO