Transmission failure diagnosis apparatus.

摘要

There is disclosed a transmission failure diagnosis apparatus for use in a multiplex transmission system which sends and receives data by time division communication among a plurality of nodes connected by a common transmission path (1). The diagnosis apparatus comprises a reception circuit (21), connected in the transmission path, for receiving a transmission signal on the transmission path, an amplitude detection circuit (22) for detecting the signal amplitude of a transmission signal received by the reception circuit, and a judgment circuit (23) for judging failures in the system on the basis of the amplitude of the transmission signal detected by the amplitude detection circuit.