TSP #183 - Experiments & Exploration with the Amazing Vintage (1966) HP Frequency Meter Instruments
In this episode Shahriar describes the operation of the vintage HP frequency meter devices. These instruments were designed in the mid-1960’s and offer extremely good performance. The principle operation is based on a quarter-wave tuned cavity which is mechanically adjusted with high precision. The cavity is coupled to the through line which causes a dip of about 1.5dB at resonance.
The internal structure and design challenges are presented. A frequency meter is then used to measure a single tone and two-tone signal with impressive accuracy. The scaler transmission response of the frequency meter is also presented.
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