Table 3: Troubleshooting The Gps/Dgps Antenna Installation - NorthStar 961 Install Manual

Table 3: Troubleshooting the GPS/DGPS antenna installation

Symptom
GPS Antenna
Poor or no GPS signal while using the
AN150 antenna.
If 5.5 VDC low or missing with load
connected:
If 5.5 VDC low is missing with load
disconnected:
If 5.5 VDC is present:
DGPS Antenna
No GPS or DGPS
Poor or no GPS signal while using the
AN205-P antenna with splitter:
If 7.75 VDC is low or missing with
load connected:
If 7.75 VDC is low or missing with
load disconnected:
If 7.75 VDC is present at processor
UHF connector but not at antenna:
No beacon signal (applies to all DGPS
antennas):
BCN RCVR ST
If the
FAILED
:
If the coax and antenna are okay
and there is 7.75 VDC:
961/962 INSTALLATION MANUAL Revision A
Possible Solutions/Reasons
•
Turn off any onboard transmitting devices.
•
Check for 5.5 VDC at antenna with and without antenna load
connected.
• Check for 5.5 VDC at 961/962 processor BNC connector
(1710 board).
•
It indicates a bad 1710 board. Replace the 1710 board.
•
It indicates a bad connector installation, bad 1710 board, or
bad AN150 antenna.
•
It indicates a bad AN150. Replace the AN150.
•
Bad splitter configuration.
•
Splitter cables may be reversed for GPS and DGPS output.
• Check installation for correct cabling.
•
Check for 7.75 VDC at antenna with and without antenna load
(cables and splitter) connected.
measure VDC under load.)
•
Check for 7.75 VDC at 961/962 processor UHF connector.
•
It indicates a bad connector installation, bad 1710 board, bad
AN2xx. The load is too great or the 1710 board is defective.
•
It indicates a bad 1710 board.
• It indicates bad cabling, bad connectors, or a bad splitter.
•
Press the
then press the
DGPS SYSTEM
to "on," and that the
• Press the
then press the
RCVR ST
•
reads Check the coax and antenna for an open/short, and check for
7.75 VDC at the UHF connector, under load.
• The 1710 board in the processor may be bad.
SECTION TWO - Installation
a
b
c
(Use "T" connectors to
SETUP MENU
key to display the
BEACON FREQ
option and
BAUD RATE
option is set to "auto."
SETUP MENU
key to display the
key. Check that the
PASSED
displays .
screen,
key. Check that the
option are set
screen,
BCN
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