Thales 421, Operation And Maintenance, Page: 227 / 256

LLZ 421
Operation and Maintenance Alignment Procedure LLZ−1F (LPD)
ILS 420
7−19
Ed. 07.08 SOAC
7.7.6 Width Alarm
a) Open dialog ’Monitor 1 − Current Executive Data’ (for MCS: dialog ’Monitor 1 − Measurements/
Limits: Current Executive Data’). Select indication ’Exec. CRS Width DDM’.
b) Open dialog ’Transmitter 1 − Waveform Data #1’. Change ’CRS SBO Amplitude’ to reach the pre-
set alarm limits. If necessary, restrict further as specified by the flight check crew.
c) Open dialog ’Monitor 1 − Executive Alarm Limits’ (for MCS: dialog ’Monitor 1 − Measurements/
Limits: Current Executive Data’). Enter displayed ’Exec. CRS Width DDM’ value as the alarm limit.
7.7.7 Miscellaneous
Some other parameters must also be checked, e.g. the range. No further settings must be made with
the transmitter or monitor however.
NOTE: During flight check the ident signal of the localizer is also checked by the flight check crew.
For this check, the system has to be set to normal operation, i.e. monitor bypass is re-
moved to enable the transmission of the ident signal. If monitor bypass is set, transmitting
of the ident signal is disabled.
Finally, the system has to be set to normal operation, i.e. monitor bypass is removed, TX1 is aerial
and the key−lock switch at the LCP is set to "Remote".