
Preventive Maintenance and Fault-finding
EN/LZT 790 0002/2 R1A
7-6
Menu Item Default
Parity
Flow control
None
None
SET: LS DATA Mode
Aux PID
Off
0016
SET: DATA
PORT
Baud rate
Data bits
Stop bits
Parity
Flow control
115200
8
1.0
None
None
SET: LS O/P
O/P Format
Buffering
Bin
Flow
7.5 Fault-finding
7.5.1 General
The information contained in this chapter is intended to isolate the unit as the faulty
equipment if a system failure occurs. If the following information fails to clear the
abnormal condition, please contact Customer Services using the information given
in the Preliminary pages of this Reference Guide.
7.5.2 Preliminary Investigation
1. Ensure that all leads and connectors are in place and serviceable.
2. Ensure the unit is powered.
3. Ensure that the front panel LED is not red. If it is lit, investigate the cause of the
alarm in the alarm status menu as explained in Chapter 6, Alarms/GPOs. If the
LED is not red, verify that alarm conditions that could be met have not been
masked as explained in Chapter 6.
4. Verify signal lock and that the BER is within the acceptable range (QPSK input
only).
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