Nautel NV30 Operation And Maintenance Manual

Also see for NV3.5: Troubleshooting manual

Nautel NV30 Operation And Maintenance Manual Manual pdf 133 page image

NV30/NV40 Operations and Maintenance Manual Routine maintenanceIssue 3.3 2014-12-10 Page 3-5Performing 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.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 the front panel AUI’s spectrumanalyzer.– Take a portable receiver to different locations in your coverage areas to identify anyproblems with the antenna pattern or areas of localized interference.2. Obtain the Critical Parameters sheet that was completed during factory testing and providedwith the transmitter. Use the transmitter’s AUI to compare current transmitter settings withthose on the Critical Parameters sheet.Note:Nautel completes the Critical Parameters sheet with the transmitter terminated into a precision 50ohm load. Measurements made on site into a dummy load or station antenna may not yield the samereadings. Slight variances are acceptable. The data is provided as a troubleshooting aid.