[Test-Equipment] rms voltmeter?

[David DiGiacomo]

>I have an HP 410B that I am attempting to use to measure some rms RF
>voltages in the HF range.  I think the unit is not working correctly.
>Someone had "restored it" before I bought it and I think its all screwy.
>At the moment, I don't feel like trying to figure it out or fix it.
>
>Can anyone recommend a more modern (but not too $$) that can provide RMS
>voltage measurements into HF and maybe beyond? The 410B will do 700Mhz
>which is nice, but I probably don't need that high.

This is confusing, since the HP 410B does not make true RMS measurements.
The manual says: "The AC portion of the instrument is a peak reading
device, calibrated in rms volts".

If you don't in fact need TRMS measurements, and don't need to measure low
level signals, you might consider a simple DMM RF probe such as a Fluke
85RF.

For low level measurements, an HP 3406A sampling voltmeter might be the
cheapest option.

You could also get a Boonton 92B, but make sure it comes with a
working probe/sensor.

If you do need TRMS, look at the HP 3403C, or get a power meter such as an
HP 432A.