Line Signal Quality Detector
Original Publication Date: 1984-Jul-01
Included in the Prior Art Database: 2005-Feb-04
This article describes a device which monitors the quality of incoming signals on a communication channel and activates an indicator when the quality of the signal falls below a pre-established level. The device includes an electrical circuit which monitors the phase of an incoming signal and activates a light when said signal falls below the predetermined level. The block diagram depicts the line signal quality detector. The detector includes the phase error detector whose input terminal accepts the incoming data and the output is fed into one leg of a comparator. A reference signal is fed into the other leg of the comparator. The output of the comparator is fed into a "bad" sample counter. Another signal from a message counter or timer is fed into the "bad" sample counter.