Hi, do you have an equivalent product to the old HP3400A true rms volt meter? The site page for this old product says obsolete and no replacement product. We need to measure a couple hundred KHz of noise and used to use the 3400A.
There is no direct replacement for the very old 3400A analog rms voltmeter. The Keysight 3446x DMM line True RMS ACV function has 300 kHz bandwidth and good accuracy.
Thanks very much for the reply and direction. The 3446x sounds with 300 KHz BW should do what we want, measuring system Y-factor at the final baseband video output. We'll look into it.
Macdonald J Andrews
Senior Engineering Fellow
Space and Airborne Systems
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