Manual Title:
LD7 Operations Manual
Ref.:
AB-V-MA-00555
Rev No:
A9
Page 31
Interference
Investigate any source of L-band
transmissions. Also high power
transmissions of other frequencies. If
possible, shut down possible sources to
eliminate them.
Antenna disconnected or inoperative Visually check antenna and cable for
possible damage. Check coaxial
connections.
5.4
HEADING FAULTS
Fault
Reason
Remedy
No GNSS heading
solution output
Incorrect serial port
configuration
Check serial port configuration in the LD7
Web page. Ensure that HDT format is
selected in either NMEAa or NMEAb.
Ensure that the NMEA stream which has
HDT enabled is selected on the relevant
serial port.
No GNSS data.
Using the Rx Control software, check that
both the main and auxiliary GNSS inputs
show valid GNSS data
Details of how to check this can be found
in Appendix VII of this manual.
Visually check antenna and cable for
possible damage. Check coaxial
connections.
Poor heading accuracy Insufficient antenna
separation
Relocate antennas ensuring that the
baseline between the two is sufficient to
produce the required heading accuracies.
Details of the expected heading accuracies
can be seen in Section 2.1.2 of this
manual.
