Error-rate monitoring unit in a communication system

摘要

A method and apparatus are disclosed for monitoring the accuracy of electronic data transmitted over a communication channel or telemetry link. An error code is generated for a unit of data transmitted and one for a unit of data received. The error code for a unit of data received is transmitted to the data transmitting station and then compared with the error code representing the unit of data transmitted. Means are provided to synchronize the comparison of error codes so that the two error codes compared represent the same data. After synchronization the bit error rate (BER) is calculated based on the number of miscompares that result for a given quantity of data transmitted. When the system exceeds a predetermined level corrective action is taken.