[Test-Equipment] rms voltmeter?

[J Forster]

Only, if you KNOW the waveform is a pure sine wave or square wave, with an
exception if you are using a digital scope with sampling and computation
capabilities for doing a point by point power measurement and integrating it
over a cycle.

Best,
-John



Ron Youvan wrote:

> [snip]
>    Accurate power measurements can be made by putting a "T" at the
> input of the load and viewing * the peak to peak (sine wave) voltage
> across the load and mathematically determine the power level.
>
> * Using a 'scope that is flat beyond the observed frequency if
> you have or can borrow one