Our preventive maintenance visits help keep the transmitter in peak operating condition. We often locate and repair problems before they occur. In addition to making certain the transmitter is operating as efficiently as possible and is providing the optimum signal performance, we have a list of common failure points we inspect while on site. We also point out these high failure areas to station personnel so they can have a jump start on troubleshooting future problems. For IOT transmitters, we record tracking data in an Excel workbook that maintains the operating parameters of the IOT across time. We like to leave copy of this workbook with the station engineer's use in maintaining the transmitter. We verify amplifier tuning and make adjustments where necessary. A complete report is provided for future reference.
Click any of the thumbnails below to see some sample tuning and harmonic measurement plots in a new window (harmonics as measured at the IOT output NOT after the harmonic filter). It is important to keep harmonics a minimum of 30 dB below the fundamental, as measured at the IOT output.
Click the thumbnails below to see some sample ATSC performance measurements in a new window. Measurements we made with the receiver EQ off.