NorthStar 961 Install Manual

Also see for 961: User manual Reference manual Reference manual

Contents

NorthStar 961 Install Manual Manual pdf 49 page image

SECTION TWO - Installation961/962 INSTALLATION MANUAL Revision A Page 39Table 3: Troubleshooting the GPS/DGPS antenna installationSymptom Possible Solutions/ReasonsGPS AntennaPoor or no GPS signal while using theAN150 antenna.• Turn off any onboard transmitting devices.• Check for 5.5 VDC at antenna with and without antenna loadconnected. a• Check for 5.5 VDC at 961/962 processor BNC connector(1710 board).If 5.5 VDC low or missing with loadconnected:• It indicates a bad 1710 board. Replace the 1710 board.If 5.5 VDC low is missing with loaddisconnected:• It indicates a bad connector installation, bad 1710 board, orbad AN150 antenna.If 5.5 VDC is present: • It indicates a bad AN150. Replace the AN150.DGPS AntennaNo GPS or DGPS • Bad splitter configuration. b• Splitter cables may be reversed for GPS and DGPS output.Poor or no GPS signal while using theAN205-P antenna with splitter:• Check installation for correct cabling.• Check for 7.75 VDC at antenna with and without antenna load(cables and splitter) connected. c (Use “T” connectors tomeasure VDC under load.)• Check for 7.75 VDC at 961/962 processor UHF connector.If 7.75 VDC is low or missing withload connected:• It indicates a bad connector installation, bad 1710 board, badAN2xx. The load is too great or the 1710 board is defective.If 7.75 VDC is low or missing withload disconnected:• It indicates a bad 1710 board.If 7.75 VDC is present at processorUHF connector but not at antenna:• It indicates bad cabling, bad connectors, or a bad splitter.No beacon signal (applies to all DGPSantennas):• Press the 56#4 key to display the SETUP MENU screen,then press the 4'%'+8'45'672 key. Check that theDGPS SYSTEM option and BEACON FREQ option are setto “on,” and that the BAUD RATE option is set to “auto.”• Press the 56#4 key to display the SETUP MENU screen,then press the 241&7%6+0(1 key. Check that the BCNRCVR ST displays PASSED.If the BCN RCVR ST readsFAILED:• Check the coax and antenna for an open/short, and check for7.75 VDC at the UHF connector, under load.If the coax and antenna are okayand there is 7.75 VDC:• The 1710 board in the processor may be bad.