Lband Signal Faults - Veripos LD6 Operation Manual

Procedure Title: LD6 Operations Manual (B Variant)
File Ref.: AB-V-MA-00589
4.4

LBAND SIGNAL FAULTS

Fault
Sync indicator shows
red.
For Verify QC, consult the Verify QC Operations Manual for guidance on its' use where
provided in conjunction with the LD6.
For problems relating to antennas or cables, see the LD6 Installation manual and the
Antennas & Coaxial Cable Installation guide before installing replacement equipment and
for a general guide to equipment installation.
Rev No: A4
Reason Remedy
Use the 'Global coverage chart' (in Section 4)
No sync with satellite
to check which beam is correct for current
beam
location.
No beam being
Go to LBAND/Config/Beams to check and, if
received. Unit
required, amend to the correct regional
requires a restart
beam.
Where L-BAND signal is derived from
vessel's Inmarsat. – Unit may have lost
beam lock or has switched to a different
geostationary satellite. Confirm the
Inmarsat is tracking the correct satellite.
Check the correct frequency is entered -
refer to Section 4 of this manual. Contact
Helpdesk.
Vessel has moved to Check which beam is selected at
a new LBAND/Status/
Device Status.
work region - beam
used has not been
If necessary consult the Chart in the
changed
Reference information chapter and if required
select the regional beam.
Antenna blockage Visually check whether the path between
the antenna and satellite is subject to
blockage.
This can occur when the vessel is in port
and/or alongside a large structure. Blockage
can also be caused by the vessel's own
superstructure. This may be eliminated by
changing the heading.
Investigate any source of L-BAND
Interference
transmissions
and high power transmissions of
other frequencies.
If possible shut down possible sources to
eliminate them.
Antenna
Visually check antenna and cable for DC
disconnected or
power and damage. Check coaxial
inoperative
connections and inspect antenna for
damage.
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