Nautel XR12 Operation And Maintenance Manual

Also see for XR12: Installation manual Troubleshooting manual Preinstallation manual

XR12 Operations and Maintenance Manual Routine maintenanceIssue 3.1 2013-03-14 Page 4-34. Insert the new air filter into the brackets. Check the air filter markings or instructions toensure proper orientation, noting air flows into the back of the transmitter.5. Dispose of the used air filter.Performing on-air checksYou should check the on-air quality of the transmitter’s signal periodically. This check can be donelocally at the transmitter site, or remotely from another location in the transmitter’s coverage area.IntervalEvery 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.Procedure1. 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 anyproblems with the antenna pattern or areas of localized interference.Replacing the control/display PWB batteryReplace the battery on the control/display PWB once a year, or whenever the Low backup batteryremote interface alarm appears. Chemical leakage from an old battery could cause damage. Also, thecontrol/display PWB’s microcontroller may not retain its settings if ac power is turned off while thebackup battery power is low. The battery should be replaced while ac power is applied to thetransmitter.IntervalEvery 12 months.