Comparative Field Strength Measurements in the High and Low VHF Bands

摘要

This report presents the results of long term comparative field strength measurements in the Low and High VHF bands employed for television broadcasting. Two different types of paths were selected for these measurements. One was a clear, line-of-sight path over relatively smooth terrain, and the other was severely obstructed by a mountain range. Stations KRIS-TV and KZTV, channels 6 and 10 respectively, of Corpus Christi, Texas, were recorded at the Commission's Kingsville, Texas monitoring station; stations KPIX-TV and KGO-TV, channels 5 and 10 respectively, of San Francisco, California were measured at the Commission's Livermore, California monitoring installation. The primary purpose of these measurements was to provide information on propagation differences, if any, on Low and High VHF channels under most comparable conditions as will be described subsequently in greater detail.