[Elecraft] Measuring SSB RMS Power

[John Oppenheimer]

Hi Bob,

Document Table 1, Line 7. speech = V/5*2^.5. which is same as Vrms/5.
Using measured RMS ratios, Vrms=15.3, 15.3/5 = 3V, compared to measured
5.24V.

Speech is rather undefined, so not too worried about the discrepancy. My
speech with no pauses is ~= Vrms / 3.

Really what is being evaluated is gain resulting from speech compression.

John KN5L


On 6/20/19 9:29 AM, Bob McGraw K4TAX wrote:
> Here is a paper on the topic. This covers the correct procedure. 
> 
> http://www.eng.auburn.edu/~troppel/courses/TIMS-manuals-r5/TIMS%20Experiment%20Manuals/Student_Text/Vol-A1/a1-12.pdf
> 
> 
> 73
> 
> Bob, K4TAX
> 
> 
> Sent from my iPhone
> 
> On Jun 20, 2019, at 8:38 AM, John Oppenheimer <john at kn5l.net
> <mailto:john at kn5l.net>> wrote:
> 
>> Using DL1 with Oscilloscope to measure KX3 SSB RMS power:
>>
>> https://www.kn5l.net/ssbpower/
>>
>> Question, is this technique correct?
>>
>> John KN5L