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From: =?UTF-8?Q?Wolfgang_B=c3=bcscher?= <dl4yhf@freenet.de>
Message-ID: <566A006E.4060700@freenet.de>
Date: Thu, 10 Dec 2015 23:45:02 +0100
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Subject: Re: LF: LF EbNaut test from JN80 on 137370
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Status: O

Hi Andy,

you wrote:
 > BTW, Wolf, if you're reading this...
I've nicked some of the palette tables from the Speclab folder - saves 
reinventing wheels.   Are there any copyright / restrictions on their 
use :  The one above is Horne's 'Gram' Palette; still  one of my favourites
<

Certainly no restrictions, since I did not copy Horne's palette, instead 
I "painted" my own (if that's the correct phrase). Same applies to the 
other palettes - my personal favourite for many applications is the 
"sunrise" palette which iirc was "painted" in Italy..

Cheers,
   Wolf.

PS the "Zoom FFT" descibes what SL does to create very long FFTs, too. 
There is nothing special about it. Any SDR with a digital downsampler 
(as the AD6620 in SDR-IQ) uses the same principle as the "Zoom FFTs" 
pre-processor in the time domain.
It's only important to get the signs for the sin+cos output of the mixer 
(multiplier) right, to avoid ending up in the wrong sideband .. still 
thinking what the 'reference' for my own treatment of I+Q recordings 
was. Possible SpectraVue, which came along as the original software for 
the SDR-IQ.