SATELLITE BROADCASTING:BANDWIDTH REQUIREMENTS FOR FM TELEVISION SIGNALS

摘要

A practical investigation has been conducted in order to determine the r.f. bandwidth required to transmit, with an acceptably low level of distortion, 625-line Standard I PAL colour television signals by frequency-modulation with various values of modulation index. The work described includes measurements made on a proposed sub-carrier sound system, and an examination of the performance of a f.m. television system near the noise threshold.nValues for bandwidth and deviation are recommended for f.m. television broadcasting (including the sound signal) from satellites.