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<p>Hi guys,</p>
<p>Just my 2 cts: When Phil, VK6PH, presented his DFC idea at the
SDR Academy 2016 (HR Friedrichshafen) he spoke about a firehose to
fill the total amount of digital data (1. Nquist zone) directly
into a PC for processing. This is certainly an interesting
approach for (presently) frequencies up to 50 MHz. But e.g.
compared with HERMES I can't detect any benefit of the important
RF performance as the ADC/DAC is the limiting factor (IM,blocking,
phase noise etc.)</p>
<p>Our experience 7 years later: the promising development of the
new HERMES 2 providing two independent RX ports died on the way to
the layout of the board. Cheap derivates like Red Pitaya and
Chinese clones became the favorite SDR for homebrewing hams. The
industry's trend to higher bandwidths and microwave frequencies
created new RF transceiver chips with preamps, IQ-mixer,
RX/TX-synthesizer etc. on board. The AD9361 is covering 47 MHz to
6 GHz while der LMS7002 starts at 100 kHz up to 3.8 GHz at cost
far below USD 50. Microwave SDRs for ham application could be
built for less than USD 200. Excellent QO-100 satellite
communiction in full-duplex SSB mode is now possible for the ham
community covering at least one third of the world's surface.</p>
<p>Please don't forget, that nothing is more frustrating for a
developer, when after a long work no interest or application can
be generated.</p>
<p>73, Helmut, DC6NY<br>
</p>
<br>
<blockquote type="cite"
cite="mid:6db03b41-bb88-5487-a846-86c54c7e85da@ad0es.net">
<pre class="moz-quote-pre" wrap="">***** High Performance Software Defined Radio Discussion List *****
</pre>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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Hi.<br>
<br>
Phil Harmon VK6PH was the lead:<br>
<br>
<a moz-do-not-send="true"
href="https://www.youtube.com/watch?v=Ob4o8vrC4yM">Video
presentation</a><br>
<br>
If you look in the archives you can find entries in the 2018
timeframe.<br>
<br>
Something totally hosed my website link, it should be:<br>
<br>
<a class="moz-txt-link-freetext" href="https://ad0es.net/dfcADC/"
moz-do-not-send="true">https://ad0es.net/dfcADC/</a><br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 4/14/23 1:14 PM, Bob Stricklin
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:2D293819-8968-4C5B-9D08-F35D4D216F82@n5brg.com">
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8">
Hi Steve,
<div class=""><br class="">
</div>
<div class="">I sent a reply via HPSDR but got a notice it was
being held for some reason so sending direct.</div>
<div class=""><br class="">
</div>
<div class="">Bob N5BRG<br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">Begin forwarded message:</div>
<br class="Apple-interchange-newline">
<div style="margin-top: 0px; margin-right: 0px;
margin-bottom: 0px; margin-left: 0px;" class=""> <span
style="font-family: -webkit-system-font, Helvetica
Neue, Helvetica, sans-serif; color:rgba(0, 0, 0,
1.0);" class=""><b class="">From: </b></span><span
style="font-family: -webkit-system-font, Helvetica
Neue, Helvetica, sans-serif;" class="">Bob Stricklin
<<a href="mailto:bstrick@n5brg.com"
class="moz-txt-link-freetext" moz-do-not-send="true">bstrick@n5brg.com</a>><br
class="">
</span></div>
<div style="margin-top: 0px; margin-right: 0px;
margin-bottom: 0px; margin-left: 0px;" class=""> <span
style="font-family: -webkit-system-font, Helvetica
Neue, Helvetica, sans-serif; color:rgba(0, 0, 0,
1.0);" class=""><b class="">Subject: </b></span><span
style="font-family: -webkit-system-font, Helvetica
Neue, Helvetica, sans-serif;" class=""><b class="">Re:
Hpsdr Digest, Vol 204, Issue 2</b><br class="">
</span></div>
<div style="margin-top: 0px; margin-right: 0px;
margin-bottom: 0px; margin-left: 0px;" class=""> <span
style="font-family: -webkit-system-font, Helvetica
Neue, Helvetica, sans-serif; color:rgba(0, 0, 0,
1.0);" class=""><b class="">Date: </b></span><span
style="font-family: -webkit-system-font, Helvetica
Neue, Helvetica, sans-serif;" class="">April 14, 2023
at 7:46:15 AM CDT<br class="">
</span></div>
<div style="margin-top: 0px; margin-right: 0px;
margin-bottom: 0px; margin-left: 0px;" class=""> <span
style="font-family: -webkit-system-font, Helvetica
Neue, Helvetica, sans-serif; color:rgba(0, 0, 0,
1.0);" class=""><b class="">To: </b></span><span
style="font-family: -webkit-system-font, Helvetica
Neue, Helvetica, sans-serif;" class=""><a
href="mailto:hpsdr@lists.openhpsdr.org"
class="moz-txt-link-freetext" moz-do-not-send="true">hpsdr@lists.openhpsdr.org</a><br
class="">
</span></div>
<br class="">
<div class="">
<div class="">Steve,<br class="">
<br class="">
I do not recall what the goal of Minerva was going to
be? This is not on the list of HPSDR projects that I
see. Can you update me/us on this or post a URL to a
description?<br class="">
<br class="">
For the RF consider adding a connector to a PCB and
use the Cariiboulite-6G-01 from Crowd Supply. This is
an RF capable board that can work up to 6 GHz which
normally plugs onto a RPi. It should work with other
processor bases.<br class="">
The advantage is the board is available at a modest
cost, it is built and tested, an FPGA is included so
it is possible to customize the verily for many
applications. The design is open source and the chips
are apparently available.<br class="">
<br class="">
You may also do a similar thing with an RTL-SDR but
not have the level of flexibility the Cariboulite
would offer.<br class="">
<br class="">
Bob<br class="">
<br class="">
<blockquote type="cite" class="">
----------------------------------------------------------------------<br
class="">
<br class="">
Message: 1<br class="">
Date: Thu, 13 Apr 2023 12:54:26 -0600<br class="">
From: ad0es <a class="moz-txt-link-rfc2396E"
href="mailto:ad0es@ad0es.net"
moz-do-not-send="true"><ad0es@ad0es.net></a><br
class="">
To: <a class="moz-txt-link-abbreviated
moz-txt-link-freetext"
href="mailto:hpsdr@lists.openhpsdr.org"
moz-do-not-send="true">hpsdr@lists.openhpsdr.org</a><br
class="">
Subject: [hpsdr] Phoenix<br class="">
Message-ID: <a class="moz-txt-link-rfc2396E"
href="mailto:fab64982-a775-1cd5-2cf0-64ad5a593e94@ad0es.net"
moz-do-not-send="true"><fab64982-a775-1cd5-2cf0-64ad5a593e94@ad0es.net></a><br
class="">
Content-Type: text/plain; charset="utf-8";
Format="flowed"<br class="">
<br class="">
Hi all,<br class="">
<br class="">
I am in the final stages of prototyping a receive
only version of <br class="">
Minerva. The PCIe/FPGA/ADC parts<br class="">
are working. The final step is the design of an RF
appropriate front <br class="">
end. I'm afraid this is outside<br class="">
of my skill set...<br class="">
<br class="">
I would like the community's help in this design.?
Any <br class="">
comments/suggestions/criticisms are welcome!<br
class="">
I've put together a website with info and sample
schematics:<br class="">
<br class="">
The website <a class="moz-txt-link-rfc2396E"
href="https://url.emailprotection.link/?bfl3Wn4SkzMeF9dpnddV7H2vEGHr9gP4nAOU4pT4IZd7GYKsjyYvjfZKiSbpUzVFpW-u-8OlGy0UMQp5gW3cptA~~"
moz-do-not-send="true"><https://url.emailprotection.link/?bfl3Wn4SkzMeF9dpnddV7H2vEGHr9gP4nAOU4pT4IZd7GYKsjyYvjfZKiSbpUzVFpW-u-8OlGy0UMQp5gW3cptA~~></a><br
class="">
<br class="">
73,<br class="">
Steve AD0ES<br class="">
<br>
</blockquote>
</div>
</div>
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<br>
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