A system and method are disclosed for measurement and reporting of signal quality in an optical data link in terms of Bit Error Rate (BER). The system and method of optical fiber signal quality measurement is highly accurate in early determination of signal degradation, is computationally simple in implementation, and is immune to instability with variable temperature and other environmental factors. Counting a number of error free Cyclic Redundancy Checks (CRC) of a plurality of video signals, the computationally simple method limits the data analysis required to determine a link OK, a link degraded and a link fault status of the optical data link.