Abstract

A measuring technique is now described which enables a deviation meter to be calibrated using an oscilloscope. This is followed by a method for measuring any given f.m. deviation on oscilloscope with the aid of a strobe unit. The principles employed require that the carrier frequency is low enough for the operation of pulse circuits and that the deviation to b measured is greater than 10 per cent of teh carrier. Within these limitations, applications apart from broadcasting are obviously possible.