The Model 82RF (igure 1) is a high frequency accessory Probe designed to convert a dc voltmeter into a high frequency (100 kHz to 500 MHz) ac voltmeter. Conversion from ac to dc is accomplished on a 1:1 basis and includes a range of 0.25 to 30V rms. The probe’s dc output is calibrated to be equivalent to the rms value of a sine wave input.