<div dir="ltr">See <a href="https://apache-labs.com/community/viewtopic.php?f=20&t=2409">https://apache-labs.com/community/viewtopic.php?f=20&t=2409</a><div><br></div><div>73, </div><div><br></div><div>Scott/w-u-2-o<br><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Feb 13, 2018 at 8:11 PM, Richard Grubb <span dir="ltr"><<a href="mailto:richard.n.grubb@comcast.net" target="_blank">richard.n.grubb@comcast.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">***** High Performance Software Defined Radio Discussion List *****<br>
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<div>Can somebody please point me to documentation on Pure Signal 2 ? It seems to differ in operation from that described in the documentation for the original Pure Signal although I found my way around it.</div>
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<div>I have implemented Pure Signal 2 on a Hermes/ANAN 10 setup driving a Juma 1000 LDMOS PA. At 900 - 1000W. I am using the latest PowerSDR interface release (3.4.7) and the latest Hermes firmware. At 900 W into a dummy load it takes the first order products in the two tone test down by > 30 dB to a level just below -60 dB wrt the single tone. Nice result ! However whatever feedback level I set (up to each tone at 0 dBm) the "Feedback" indicator in the PowerSDR screen flashes red. Does that mean two much or too little feedback ? Or just that the feedback is Ok ? Thanks for any elucidation</div>
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<div>Actually the feedback level seems pretty non critical. With a coupler loss of -54 dB I get good results at 10 W barefoot as well as 1000W from the Juma</div>
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<div>73, Dick</div>
<div>W0QM/G3FNL</div></div></blockquote></div></div></div></div>