Echo Performance of TV Transmitting Systems

The main purpose of this paper is to analyze the performance ormance of the voltage standing-waveratio (VSWR) and 0.25 ¿RF pulse technique when measuring the echo performance of TV transmitting systems. In order to do so, the specifications devised by D. J. Whythe for the ghost-free operation of such systems were used. The conclusion reached is that neither the VSWR nor the 0.25 ¿s RF pulse techniques are adequate. Another method using a long RF pulse is suggested and shown to be very accurate.