Frequency Counter/ Time Analyzer The Pendulum CNT-90 timer/counter/analyzer is an ultimate tool for measurement, analysis and calibration of Frequency, Time Interval or Phase. The CNT-90 is a high-performance counter with a fast measurement speed to 250,000 measurements/s, and time interval measurement resolution to 100 ps. The CNT-90 offers ease-of-use including graphical display and improved display and improved control over measurement at an outstanding price.