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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>For archiving sections of RF bandwidth,
why do we even need to use cycles by having it go through DttSP? My idea is
simply that we would take the post-CIC samples and do file I/O immediately. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Chuck<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
frank.brickle@gmail.com [mailto:frank.brickle@gmail.com] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Frank Brickle<br>
<b><span style='font-weight:bold'>Sent:</span></b> Sunday, April 13, 2008 7:30
PM<br>
<b><span style='font-weight:bold'>To:</span></b> Lyle Johnson<br>
<b><span style='font-weight:bold'>Cc:</span></b> Chuck Hutton;
hpsdr@lists.hpsdr.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [hpsdr] Mercury
sampling rate</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Sun, Apr 13, 2008 at 8:28 PM, Lyle Johnson <<a
href="mailto:kk7p@wavecable.com">kk7p@wavecable.com</a>> wrote:<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
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<blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>PowerSDR is also open source, and the 192 kHz limitation I suspect can<br>
be worked around in that package, too.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
The DSP core of PowerSDR is DttSP (<<a href="http://dttsp.org">http://dttsp.org</a>>)
by N4HY and me. The DSP functions in QS1R and uWSDR are closely derived from
it. Any sample rate limitation is imposed by hardware and associated OS
software, not by the DSP code.<br>
<br>
If you can get samples in and out fast enough, and you have enough CPU cycles
to keep up with the arithmetic, the DSP will run at whatever speed you tell it,
in the form of a single number (the sample rate) provided at initialization.<br>
<br>
73<br>
Frank<br>
AB2KT<o:p></o:p></span></font></p>
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<br>
-- <br>
The only thing we have to fear is whatever comes along next. -- Austin Cline <o:p></o:p></span></font></p>
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