These dual microprocessor-based counters 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.
Models 1991 and 1992 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.
For applications where speed is vital, the resolution may be varied between 3 and 9 digits to provide optimum speed/resolution performance. In addition, the ability to reduce resolution is a highly desirable feature when making measurements on noisy or unstable signals.