[hpsdr] Level calculation error in Two Tone Test generation routine

[Jim Sanford]

All:

Great thread!!

I'm learning a lot, thanks to all.

73,

Jim

wb4gcs at amsat.org



On 11/24/2016 11:01 AM, Scott Traurig wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> Hi Helmut,
>
> Actually, that helped. And I just found the following citation, which 
> helped clear things up for me as well:
>
> "The display represents the rate at which peak power occurs when the 
> two frequencies are in phase and the voltages add. Thus, one peak 
> contains one-fourth (-- 6 dB) of the peak envelope power (PEP). An 
> average reading power meter would read the combined power of the 
> tones, or half the PEP, assuming the envelope distortion is negligible."
>
> So since we have a true peak reading FFT based display, we are seeing 
> the PEP spectra.
>
> Thanks,
>
> Scott/w-u-2-o
>
> P.S. I hate the 12KB message limit on this list...
>
> On Thu, Nov 24, 2016 at 10:28 AM, Helmut <dc6ny at gmx.de 
> <mailto:dc6ny at gmx.de>> wrote:
>
>     Scott,
>
>     Maybe I should have used the symbol ‘ ^’ instead of ‘*’ in the
>     formula I posted yesterday, to make it understandable for you.
>     This equation needs no logarithmic dimension. I would recommend
>     the usage of this equation and all further discussion is
>     superfluously.
>
>     73, Helmut, DC6NY
>
>
>
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at openhpsdr.org
> Subscription help: http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
> HPSDR web page: http://openhpsdr.org
> Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/



---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20161124/58947932/attachment.htm>