Agilent / HP 537A Frequency Meter, 3.7 - 12.4 GHz, N(f/f), direct reading 0.2% acc.

The Agilent HP 537A Frequency Meter is an easy-to-use, reliable meter to measure frequency accurately. The HP 537A direct reading frequency meter measures from 3.7 GHz to 12.4 GHz in calibrated increments of 10 MHz. Long scales and numerous calibration marks provide high resolution with frequency read directly in GHz. Overall accuracy is 0.17%. Coax Type N connectors.