The Fluke PM 6690 that functions as a timer, counter, and analyzer is the most flexible and precise device to use in measuring the time, frequency or even the phase. PM 6690's designed with a customized diagnosis capabilities that provides the customer both the statistical behavior of the parameter as well as its changing aspects under tests and also provide TrendPlot and Histogram display. PM 6690 has a high resolution and very fast at the same time. It has a frequency calculations of up to 12 digits for every second and a single shot time-resolution that ranges up to 100ps.