1856D - 3.5GHz Frequency Counter (Frequency, Period, Totalize)

The model 1856D provides versatility and reliability for a broad spectrum of laboratory and service applications. RS232 Interface. Wide measuring range up to 3.5GHz. Bright nine digit LED display. Period mode for accurate low frequency measurement. Totalize mode permits counting of individual events. Accurate TCO (Temperature Compensated Oscillator) time base