The Racal 1992 universal counter offer a unique combination of superior performance and measurement capability in a compact, half-rack package. The 1992 microprocessor-based counter provide outstanding operational simplicity with exceptional versatility. The measurement functions, which include frequency, period, time interval, ratio, totalize, phase and peak amplitude benefit from full GPIB programming, external arming, an internal timing delay generator and math capability. The Racal 1991 feature a remarkable 9-digit resolution in 1 second whatever the frequency. This is achieved by using a time error correction (TEC) high resolution counting technique, which extends the capability of recipromatic measurements by providing an effective clock frequency of 1GHz.