<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><BR><DIV><DIV>On Mar 7, 2007, at 6:18 AM, John Welch wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><DIV><BLOCKQUOTE class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I running ivtv .10 and <A href="http://2.6.20.1">2.6.20.1</A> kernel with mythtv<BR>20.1 fixes. My issue is the picture quality on<BR>channels 2, 4 and 5. I am using Comcast in New<BR>England. I have tried fine tuning the channels, but<BR>the defaults frequencies are the best picture I can<BR>get. I don't believe this to be a mythtv issue, <BR>because mplayer /dev/video0 shows the same quality. I<BR>am using a 250 and a 500 in my backend and the quality<BR>is about the same on both cards.</BLOCKQUOTE><DIV><BR>I had a similar problem, also with Comcast - North of Boston area, when I first setup my Myth box with a PVR-150 card about a year ago. My problems were mostly on channels 5 (ABC) and 6 (NECN). Unfortunately it was so long ago (at least for my memory) that I don't recall the exact steps I took to fix it. I believe I used the ivtv tools to tune to the channel. That gave me the frequency of the channel. Then I bumped it up by increments of 25 or 50 until I got a good picture with mplayer. I took the frequency from there, went into the mtytv-setup Channel editor, and entered the frequency instead of the channel number. The bump up was more than I could get with the fine-tuning in mythtv. <BR><BR>I wouldn't totally discount the other post about a bad cable, connection, etc., but I have a feeling that Comcast does something funky with some of these low numbered channels.<BR><BR>Sorry I don't have my exact troubleshooting steps, but I hope this info can lead you on the right path. <BR><BR></DIV></DIV></BLOCKQUOTE><BR></DIV><DIV>A problem with channels 5 and 6 is most likely an incorrect channel table (ie: cable when it should be cable-HRC or vice versa).</DIV><BR></BODY></HTML>