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<P><FONT SIZE=2 FACE="Arial">Hi all,</FONT>
<BR><FONT SIZE=2 FACE="Arial"> I've been running a split FE/BE Mythtv setup with minimal issues almost for a year now. On the BE I'm using a HVR-1600 to receive OTA HD via the ATSC input from a roof mounted antenna. The issue has been that on some channel, and some channels only I've been getting what appears to be interlacing/combing effects. I have an example of this effect from the capture here on start of 60 minutes on CBS (4_2 KPIX-DT in the Bay Area). The effect is very pronounced during horizontal motion involving particularly vertical features in the picture.</FONT></P>
<P><A HREF="http://thinkspace.ath.cx/stuff/vlcsnap-2017280.png"><U><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">http://thinkspace.ath.cx/stuff/vlcsnap-2017280.png</FONT></U></A>
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<P><FONT SIZE=2 FACE="Arial">The effect is present independent of the player, whether it's on the Mimimyth FE I normally use, XBMC or VCL on my PC in this case, hence I put it down to a reception/BE issue regarding the OTA signal quality reception for these stations. Keep in mind it only happens only on some specific 4-6 OTA channels, Fox (2_1 KTVU-DT) for an example using the same setup is razor sharp with no such artifacts. Similarly the next higher channel from CBS, 7_1 (ABC) is razor sharp, but 9_1 has the issue, 11_1 is sharp etc, it may be alternating but I'm not exactly sure.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">I initially put this issue down to a reception/signal quality problem as my antenna was quite old and a combined VHF/UHF old style design. So recently I decided to get serious about solving this issue and installed a brand new DB4 UHF antenna pointed more or less in the direction of the transmission tower. But still the problem persists. The thing is both CBS (5_1) and NBC(11_1) are 304-321 degrees orientation and roughly the same distance of 21-25 miles from my place, but NBC doesn't seem to have the issue. Hence it does not seem to be reception related.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Following this I updated the cx18 driver to a more recent 1.2.0 version and rescanned all the channel, but no progress. I'm kind of stumped, anyone have any idea what may be the source of the interlacing issue on the BE? </FONT></P>
<P><FONT SIZE=2 FACE="Arial">Many thanks,</FONT>
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<P><FONT SIZE=2 FACE="Arial">Tony</FONT>
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