Measurements and Analysis of 115 KV Power Line Noise and Its Effect on Pueblo Test Site Radio Links

PDFTech ReportDOT-TSC-FRA-72-05PB-222 410Sound levelTransmission linesRadio linksAcoustic measuring instrumentsRailroadsColoradoUnited States. Federal Railroad AdministrationBuck, Richard E.Esposito, R. E.Gagnon, R.Leonard, E. T.Yoh, P.John A. Volpe National Transportation Systems Center, (U.S.)United States. Federal Railroad AdministrationAGR-INFRASTRUCTURE-RailroadsNTL-RAIL TRANSPORTATION-RAIL TRANSPORTATIONVolpe National Transportation Systems Center, Technical Reference CenterNoise measurements were made for 115 KV power lines near the frequencies 166, 217 and 406.8 MHz with a receiver bandwidth of 1 MHz. The measurements consisted of counting the numbers of pulses per minute at preset threshold values and RMS. The variations of the noise level vs the lateral distance from the power line were also measured. The worst noise level, -40 dBm, was observed at 217 MHz under a noisy power line. The results of these measurements show that, under normal conditions, power line noise will not have significant effects on the radio links at the Pueblo Test Site