Troubleshooting
LD900 Installation and Oper ations M anual
59
5.6 Corrections Issues
5.7 GNSS Heading Issues
f requency as GNSS, as well as high power
transmissions of other frequencies.
Antenna disconnected or inoperative
Check antenna and cabling for DC power
as well as signs of damage.
GNSS antenna voltage turned off.
Check
Receiver > Antenna
to ensure that
voltage is switched on for the
GNSS
Primary
(GNSS1) antenna.
Fault Description
Possible Cause
Solution
System has not
converged to PPP
System set to wrong PPP corrections
service type.
Navigate to
Configuration > Positioning
and verif y that the
Positioning Mode
matches a service shown in
Receiver >
Authorisations
.
If this is not the case toggle the
Positioning Mode
within
Configuration >
Positioning
or contact the
and request the appropriate
service.
Fault Description
Possible Cause
Solution
No GNSS heading
available
No GNSS reception from GNSS1
antenna.
Check the LD900 Status Page to see if
valid GNSS signals are being received
(GNSS icon should be green). A red GNSS
icon and no constellations highlighted
indicates a problem with the GNSS1 feed.
Check coaxial connection to GNSS1 and
inspect antenna and cabling for damage.
Conf irm that there are no potential sources
of interference or physical obstructions
around the GNSS1 antenna.
No GNSS reception from GNSS2
antenna.
Check coaxial connection to GNSS2 and
inspect antenna and cabling for damage.
Conf irm there are no potential sources of
interf erence or physical obstructions
around the GNSS2 antenna.
