[Elecraft] P3TXMON question?

[Stephen Prior]

Bill,

That's absolutely right.  There's so much confusion about such things and
you have explained it very well.  RMS can only ever be used as a value of
current or voltage, never power.

73 Stephen, G4SJP

On 21 August 2015 at 20:34, Bill Breeden <breedenwb at cableone.net> wrote:

>
> It's important to remember that RF power expressed in watts is always
> based on RMS values.  If RF watts are calculated by measuring the voltage
> across a known load, the voltage must be expressed as an RMS value to
> correctly calculate the power in watts.  Watts are watts.  There is no such
> thing as "peak to peak" or "RMS watts" when expressing RF power in watts.
>
> Peak envelope power (PEP) has nothing to do with the difference between
> the peak and average voltage of a sine wave.  It is the measure of the
> power of an RF signal at the modulation peak, averaged over one RF cycle.
> The power measurement within that one RF cycle is still based on RMS values.
>
> 73,
>
> Bill - NA5DX
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