Troubleshooting & Maintenance
Dual Antenna Arbitrator (MXP)
7-1
7.
Troubleshooting & Maintenance
7.1.
Isolating IF & RF problems:
Refer to the appropriate Simplified Block Diagram for your system to trace the TX IF or RX IF signal paths between
the ADE and BDE. Use a spectrum analyzer to test IF and RF signals.
•
For ADE RF problems refer to the System Block Diagram in your antenna manual.
•
For BDE RF problems refer to the appropriate Simplified Block Diagram in this manual. (Note: When the
Dual Antenna Arbitrator looses power the switches will default to ANT A).
7.2.
GPS problems:
Hardwire (DAA Modem to Modem Console Port) configuration:
•
Check to assure GPS is updating each MXP with the correct position information.
•
Check continuity of each of the interconnecting RJ-45 console cables between the MXPs and the Dual
Antenna Arbitrator.
•
Check GPS setting in the Dual Antenna Arbitrator.
•
Check continuity of the interconnecting RJ-45 console cable, or Ethernet cable, between the Dual
Antenna Arbitrator and the Satellite Modem.
•
Query the GPS LAT/LON position in the PCU, ACU and in the modem.
OpenAMIP Ethernet Configuration:
•
Check to assure GPS is updating each MXP with the correct position information.
•
Check continuity of each of the interconnecting RJ-45 console cables between the MXPs and the Dual
Antenna Arbitrator.
•
Check GPS setting in the Dual Antenna Arbitrator.
•
Check continuity of the interconnecting RJ-45 Ethernet cable, between the Dual Antenna Arbitrator and
the Satellite Modem.
•
Query the GPS LAT/LON position in the PCU, ACU and in the modem.
7.3.
Network Lock problems:
If Network lock is not getting into the MXPs, you will have to ascertain if the problem is in the modem, the Dual
Antenna Arbitrator or any one of the other interconnecting cables which carry this signal.
If your modem does NOT have network lock output available:
•
Assure that the Modem settings in you MXP are set to reflect that, so that the system will track on any
satellite signal level, at the tracking frequency, which is above threshold.
If your modem does have network lock output available:
•
Test the output from the modem to the Dual Antenna Arbitrator.
•
Check continuity of the interconnecting RJ-45 serial cables between the MXPs and the Dual Antenna
Arbitrator. If your system is Ethernet based, check continuity of the Ethernet cable(s) to the MXPs.
•
Check continuity of the interconnecting RJ-45 console cable, or Ethernet cable, between the Dual
Antenna Arbitrator and the Satellite Modem.
•
Test the Satellite Modem Lock input to EACH MXP.
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