<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Tom,</div><div><br></div><div>Sounds interesting. What are you sending that is so wide?</div><div><br></div><div>I look at hermes often and think of it like a very general toolset for rf. Lots of ideas start with...."I wonder if I could use the hermes hardware for this?"</div><div><br></div><div><br></div><div><br></div><div>Greg<br><br>Sent from my iPad</div><div><br>On Mar 31, 2014, at 4:28 AM, Tom McDermott <<a href="mailto:tom.mcdermott4@yahoo.com">tom.mcdermott4@yahoo.com</a>> wrote:<br><br></div><blockquote type="cite"><div><span>***** High Performance Software Defined Radio Discussion List *****</span><br><span></span><br></div></blockquote><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">Upgraded Hermes to V2.6 last night. Process went smoothly, no apparent issues. Still using HPSDR Programmer 1.6 which continues to work flawlessly on an old WinXP box (with PCAP).<br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">In testing V2.3 and V2.6 - am
impressed with the improved functionality of the Hermes transmit chain.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">In V2.3 the passband response was approximately sin(x)/x, with some aliasing near +/- 24 KHz. Transmitting a +21 KHz baseband signal generated some -27 KHz alias content for example. For most ham baseband applications, none of this matters of course.<br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size:
16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">In V2.6 the transmit response is very impressive. Flat amplitude out to near 24 kHz, and not able to see the generation of any aliasing components when sweeping out to +/- 24 KHz baseband. For certain unusual applications the flattened transmit chain is most welcome improvement. Thanks to Phil et al. for this nice upgrade to the FPGA code.</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;">-- Tom, N5EG</div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family:
HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif; background-color: transparent; font-style: normal;"></div></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>HPSDR Discussion List</span><br><span>To post msg: <a href="mailto:hpsdr@openhpsdr.org">hpsdr@openhpsdr.org</a></span><br><span>Subscription help: <a href="http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org">http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org</a></span><br><span>HPSDR web page: <a href="http://openhpsdr.org">http://openhpsdr.org</a></span><br><span>Archives: <a href="http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/">http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/</a></span></div></blockquote></body></html>