Philips PM6665 in Cary, NC, USA

1.3 GHz Programmable Counter / Timer The PM6665 is a 120 MHz to 1.3 GHz Counter / Timer. This 2 channel unit offers many functions as standard: Frequency, Period, Freq Ratio, Totalize Pulses, Time Interval, and PM. It is highly integrated ensuring reliable, low power operation. Stability is exceptional via the temperature compensated crystal oscillator and the all metal cabinet gives excellent shielding and stability. Frequency measurements have continuously variable sensitivity and noise immunity and time measurements can be triggered within a wide +5V / +50V range.