[Heath] Peak and peak to peak/RMS relationship

Kenneth G. Gordon kgordon2006 at frontier.com
Fri Jan 17 19:34:52 EST 2014


On 17 Jan 2014 at 13:51, Ken Bakhaus wrote:

> I would like to clarify the relationship between peak and peak to
> peak/RMS so no one miscalibrates something based on the relationship
> which was recently posted with a slight error. Peak = 1.414 times RMS
> and Peak to peak = 2.828 times RMS for a sine wave where 1.414
> represents the square root of 2.

Correct.

> The constant of pi is not involved in
> this relationship.

Yes. That is correct. Did I insert that into the calculation? If so, 
that was NOT a "slight error" on my part: I would have called it a 
major error. But, thank you.

> The numbers are derived from a calculus integral of
> the wave form. The constant in the relationship will vary for wave
> forms other than a sine wave.

Again, correct.

Ken Gordon W7EKB since 1956


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