Verifying the Wideband Input of an AC Measurement Standard

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Verifying the Wideband Input of an AC Measurement Standard (86.84 KB)

This paper describes the test method used by the manufacturer of a high accuracy AC Measurement Standard to verify the flatness and gain error of its Wideband input. This input has a 50Ω input impedance and measures voltage from 700 μV to 7 V, 10 Hz to 30 MHz on eight voltage ranges. Discussed first are some issues associated with verifying an instrument with a 50Ω input impedance followed by a description of the method used to verify the AC Measurement Standard. Last is a description of the methods used to calibrate the standards used.