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<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT
face=Arial>Interesting. Does <SPAN class=437541922-06022011>the
drop-out</SPAN> seem depend<SPAN class=437541922-06022011>e</SPAN>nt on
modulation or <SPAN class=437541922-06022011>will it drop out if you just
leave the carrier on for a few minutes with no
modulation?</SPAN></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT face=Arial><SPAN
class=437541922-06022011></SPAN></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT face=Arial><SPAN
class=437541922-06022011>Technically, there's no "over-modulation" of the
negative peaks when using a balanced modulator to generate DSB with
carrier, since the carrier is never fully cut off, as with a conventional
plate or collector modulated system. </SPAN></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT face=Arial><SPAN
class=437541922-06022011></SPAN></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT face=Arial><SPAN
class=437541922-06022011>But, if the drop outs are
audio-related, maybe the higher positive audio peaks are triggering
something else that requires more CPU overhead?</SPAN></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT face=Arial><SPAN
class=437541922-06022011></SPAN></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT face=Arial><SPAN
class=437541922-06022011></SPAN></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT face=Arial><SPAN
class=437541922-06022011>I will run some tests too and see what happens
here.</SPAN></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT face=Arial><SPAN
class=437541922-06022011></SPAN></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=968401822-06022011><FONT face=Arial><SPAN
class=437541922-06022011>Tom, K1JJ</SPAN></FONT></SPAN></DIV><BR></DIV><BR>
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<FONT size=2 face=Tahoma><B>From:</B> hpsdr-bounces@lists.openhpsdr.org
[mailto:hpsdr-bounces@lists.openhpsdr.org] <B>On Behalf Of </B>FRANCIS
CARCIA<BR><B>Sent:</B> Sunday, February 06, 2011 5:11 PM<BR><B>To:</B>
hpsdr@lists.openhpsdr.org<BR><B>Subject:</B> [hpsdr] TX drop outs generating
transients<BR></FONT><BR></DIV>
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<DIV><A
href="http://www.youtube.com/watch?v=gsSok0y4h7A">http://www.youtube.com/watch?v=gsSok0y4h7A</A></DIV>
<DIV> </DIV>
<DIV>My friend Rob W1AEX just recorded his screen shot of my HPSDR on AM
during drop outs. Notice the transient generated down frequency. This was
after I disabled windows Indexing and removed some server software
from my machine. Dell 650 dual- dual core </DIV>
<DIV>running at 5-7% horsepower. I'm running 1.2 Firmware in Penny. Also
get drop outs in RX from time to time. Rob is about 20 miles away. I was
running 20 watts AM. I wonder if this </DIV>
<DIV>could be due to over modulation. I need to do some more testing but
it does also happen on RX. I suppose you would never notice this on SSB
unless there was constant audio. Frank
WA1GFZ</DIV></TD></TR></TBODY></TABLE></BODY></HTML>