TIME-DOMAIN REFLECTOMETER FOR TESTING COAXIAL CABLES

摘要

A time-domain reflectometry device and method are provided wherein TDR may be performed on active Ethernet systems. A crossover network provides proper impedance termination both for pulse information generated by the TDR and for DC path signals. If a potential collision is detected when generating TDR pulses, a collision is forced by asserting a DC bias on the network thereby simulating a collision and generating a timeout at a much lower protocol level for reducing noticeable delay to network users and increasing network throughput.