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"Mike Rivers" > wrote in message
> On 11/20/2010 3:53 PM, rickman wrote: > >> I don't recall any such restriction on N. Certainly the >> measurement has just as much meaning with N = 1 as any >> greater N. Think of it as a limit as N approaches 1 >> then. The point is that it is as valid a measurement >> for a single point as it is for many points. It >> represents the equivalent voltage that would produce the >> same power as DC of the same voltage. > > Consider the effective value of RMS. It's the amount of > heat can be produced by the electrical energy. If you > have only one sample, no matter how high it is, do you > really think it will warm up your coffee? Depends on the sample rate. If the sample rate is one sample every 10 minutes... ;-) |
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