Nautel XR6, Operation And Maintenance Manual

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XR6/XR3 Operations and Maintenance Manual Routine maintenance
Issue 3.1 2013-03-14 Page 4-3
3. Remove the old filter.
4. Insert the new air filter into the brackets. Check the air filter markings or instructions to
ensure proper orientation, noting air flows into the back of the transmitter.
5. Dispose of the used air filter.
Performing on-air checks
You should check the on-air quality of the transmitter’s signal periodically. This check can be done
locally at the transmitter site, or remotely from another location in the transmitter’s coverage area.
Interval
Every 12 months, or as required by law.
Parts and tools
• High-quality receiver compatible with the modulation scheme used on the transmitter.
• A spectrum analyzer, if one is available.
Procedure
1. Monitor the transmitter signal to identify any problems:
– Use a high quality receiver to monitor audio quality.
– Check the spectral output of the transmitter using a spectrum analyzer.
– Take a portable receiver to different locations in your coverage areas to identify any
problems with the antenna pattern or areas of localized interference.
Replacing the control/display PWB battery
Replace the battery on the control/display PWB once a year, or whenever the
Low backup battery
remote interface alarm appears. Chemical leakage from an old battery could cause damage. Also, the
control/display PWB’s microcontroller may not retain its settings if ac power is turned off while the
backup battery power is low. The battery should be replaced while ac power is applied to the
transmitter.