METHOD OF COMPARING THE MODULATION OF TWO BROADCAST SIGNALS AND CIRCUIT FOR CARRYING OUT THIS METHOD

摘要

1. Method of comparing the modulation of two radio signals wherein a modulation signal is superposed on HF carrier signals of different frequency, characterized in that a sector of equal duration is digitalized from the two modulation signals and is read into each of two stores (RAM A and RAM B), in that the store contents are correlated for the modulation comparison, and in that, if correspondence does not occur, the store contents are shifted relatively to each other and are again correlated to each other, the shift and the correlation of the two store contents being continued, in the absence of correspondence, until the entire relative shift of the store contents corresponds to the duration of one store content.