The Fluke PM 6681 timer/counter spans a frequency range of up to 8 GHz, which enables calibration of microwave links, communications and radar equipment. You can make frequency measurements accurately and easily, not only on continuous carrier waves, but also on burst signals. Resolution With the high resolution/speed performance of 11 digits/s, these counters are ideal tools for frequency measurements on telecom systems. Time interval measurements down to 1ps average and 50 ps single shot are supported.
PM6681R makes this instrument the most accurate Frequency Reference(Counter/Calibrator for the calibration of frequency, time or phase
