00000nam 2200000zi 4500 9.895023 CaOODSP 20221107173917 m o d f cr bn||||||||| 210105e198303 oncab obt f000 0 eng d CaOODSP eng rda CaOODSP n-cn-mb x7x7 Co24-3/7-1362-1983E-PDF Lauber, W. R., author. Measurements and modelling of the HF radio noise environment near an HVDC converter station / by W.R. Lauber and J.M. Bertrand. Ottawa : Communications Research Centre, March 1983. 1 online resource (iii, 57 pages) : illustrations, map. text txt rdacontent computer c rdamedia online resource cr rdacarrier CRC report ; no. 1362 "Radar and Communications Technology Branch." Digitized edition from print [produced by Innovation, Science and Economic Development Canada]. Some pages rotated in this copy. Includes bibliographical references (pages 44-46). "Measurements of the HF radio noise environment near an HVDC transmission line and converter station were made outside Winnipeg in July 1977. Typical levels and characteristics are presented for various combinations of mercury arc valve noise, AC hum and DC corona from a number of sites within eight kilometres of the converter station. In addition, two sets of measurements were taken 80 km from the converter station. Values of the root-mean-square, average and quasipeak voltages were calculated from the Amplitude Probability Distributions (APDs) of the noise and were found to compare favourably with the directly measured values. Four mathematical models, the Rayleigh and three others which were developed for atmospheric noise were fitted to the measured APD data. Using inputs of Vrms and Vd the Log-Normal model produced the most accurate predictions of the measured APDs. The Log-Normal and the Hall models both fitted the measured Average Crossing Rate data equally well"--Abstract, page 1. Issued also in print format. Radio noise Manitoba Measurement. Radio noise Manitoba Mathematical models. Electric lines Manitoba. Electric substations Manitoba. Bruit radioélectrique Manitoba Mesure. Bruit radioélectrique Manitoba Modèles mathématiques. Lignes électriques Manitoba. Postes de réseau électrique Manitoba. Communications Research Centre (Canada), issuing body. CRC report ; no. 1362. (CaOODSP)9.882492 PDF 1.43 MB https://publications.gc.ca/collections/collection_2021/isde-ised/co24/Co24-3-7-1362-1983-eng.pdf