HP 5352B 40 GHz Frequency Counter
Automatic microwave counter. Input 1: 500MHz to 40GHz. Input 2: 10Hz to 525MHz. Sensitivity at 40 GHz to -20 dBm. TCXO timebase with aging rate 1 part in 10 million per month. HPIB interface. Input connector APC-3.5 (male) with collar; type N adaptor included.