R: [AMPS] Watt meters and PEP

[measures]

>
>measures wrote:
>>>>> ?  RMS is  equivalent DC heating ability.  For example, with a
>>>>> sine-wave,
>>>>> 200w-pk would have the heating ability of 100DC watts.  .
>>>>>
>>>>>This "200w-pk" is a peak instantaneous power. Peak instantaneous power
>>>>>is a notion with very little physical meaning, and no practical use.
>>>>>Ignore it - its only power is to confuse.
>>>>>
>>>>This is essentially how the FCC measures PEP.
>>>
>>>I cannot believe that.
>>>
>> I realize this, Ian.  
>>
>>With a 50-ohm load, 387.3v-peak indicates 1500w PEP on the wattmeters the 
>>FCC uses. 
>
>Yes, obviously. There is nothing wrong with that "v-pk" calculation.
>
>What I cannot believe is that the FCC make any use of the quantity that
>you call "w-pk".
>
They don't call it that, but this is essentially how one calibrates such 
a meter.  When one measures 387.3v-pk across a 50-ohm load with an 
NBS-traceable oscilloscope and multiplier-probe, the "PEP" meter is adj. 
to read 1500w.  

cheers, Ian.  


-  Rich..., 805.386.3734, www.vcnet.com/measures.  


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