B&K Precision Frequency Counter 0.1 Hz...3.5 GHz

The model BK1856D is a reciprocal 3.5GHz universal frequency counter that is microprocessor controlled. The LED display can provide nine digits of resolution using the internal 10s gate time. The high accuracy, sensitivity and versatility of this counter make it an extremely valuable instrument to scientists, engineers, experimenters and communications technicians.. External frequency standard input. Bright LED display. Attenuator. Period. Total. Low pass filter. Line filter.