The 536A Frequency Meter is an easy-to-use, reliable meter to measure frequency accurately. This direct reading frequency meter measures from 960kHz to 4.2GHz in calibrated increments of 2MHz. Long scales and numerous calibration marks provide high resolution with frequency read directly in GHz. Overall accuracy from 960kHz to 1.0GHz is 0.22% and from 1.0 to 4.2GHz is 0.17%. Coax Type N connectors.