... MCH RF Frequency Counter,FC-3000 RF frequency counter,max.3.7GHz frequency:Specificaitons: Model SpecificationsFC-3000Display9digit large LED display, overflow ... , HOLDFrequency measurementRange 0.1Hz to 100MHz (A input), 80MHz to 3.7GHz (C input )Gate time0.01Sec, 0.1Sec, 1Sec, 10SecResolution1nHz ... RF Frequency Counter,FC-3000 RF frequency counter, max. can test to 3.7GHz