Method and apparatus for supervising digital radio transmission line

摘要

A supervisory system for a digital radio transmission line distributed between a transmitter part and a receiver part. The receiver part produces error pulses from a code signal for error rate detection sent from the transmitter part; each time interval between two successive error pulses (appearing at 30) is measured (31, 32, 33) and the measured time intervals are processed (34, 39) to estimate the transmission line quality in accordance with the variation of said time intervals between two successive error pulses, and to issue (on 21) a line switching command.