Surveyor Central
4-4
10. No Telemetry signal present, symptom related to all windows:
Possible solutions:
Verify signal strength, if strength approx
–180 PCIRF card driver not running, restart Telemetry node.
If signal level is approx
–120 dB, problem may be connected to the antenna network. Verify all LED’s are
illuminated on the Antenna Network Units, Down Converter/ LNA(611/915) depending on system
configuration and verify cable connections.
Be sure Down Converter if a 2500MHz system, is on the same band as the transmitters in use. (See
channel utilization chart for customer). Disconnect the antenna network cables from the input of the Down
Converter, install antennas on the inputs of the Down Converter, if the problem is gone the problem is
related to the antenna network.
If system is 608/915MHZ, disconnect cables from antenna network on LNA(611/915), install antennas on
the PCIRF board(s), if the problem is gone, the problem is related to the antenna network.
11. Antenna Network:
Bad Coverage in 1 area:
Possible solutions:
Possible problem with a specific antenna network unit. Check unit has both LED’s illuminated.
This symptom can be caused by several failures.
If the area is related to the antenna, which is farthest from the Telemetry node, the problem
could be either the antenna box or a cable leading to the next antenna in the chain.
If the area is related to an antenna elsewhere in the network, the problem is most likely due to
the antenna network unit which services the area in question.
Large difference between signal A and signal B one window only:
Possible solution:
This problem may be related to a faulty receiver on a specific PCIRF board. Contact Mortara
Technical Support for a Replacement board.
Large difference between signal A and signal B all windows:
Possible solution:
Check all coax cables to look for a problem related to a BNC connector.
Try to replace the Down Converter (2500 MHz systems) or LNA-611/915 (600 & 915 MHz
systems).
Interference:
Possible causes: Microwave ovens, Bluetooth devices, 2500 MHz wireless routers, cordless
Phones, wireless temperature monitoring system, or radar therapy devices. It is the responsibility
of the facility to narrow down the cause of the interference and isolate it.
Summary of Contents for Surveyor Central 3.x
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