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Message: <blockquote data-quote="cewillis" data-source="post: 751561" data-attributes="member: 106719">First, many thanks for your patience and analysis.All my TV channels are on cable - mixed analog and digital obviously.  I'm pretty sure the provider uses fiber to their local distribution 'boxes' throughout the community.The provider just upgraded the the cable from their nearby local distribution 'box' to my house to RG11/U. All the cables in the house are RG6/U.There is a provider supplied 3 way splitter at the providers service entrance. The -3.5db branch goes to one area where it is further split 2 ways (-3.5db each) to my cable modem, and a small tv.One of the -7db branches goes to the bedroom wing where it is further split 3 ways to tvs.The other -7db branch goes to the family room where it is split two ways to my HTPC and my Sony lcd.As mentioned, the Hauppauge tuner again splits the signal two ways for the dual hybrid tuners.I have verified all the connections are good, and there are no unterminated splitters. That may sound like a lot of splitting and signal degradation. As counter, I offer these, if they mean anything:1) signal strength report from cable modem (attached)2) I almost never see any picture problem on any of the tvs, although only 3 have QAM tuners, one on each cable branch.3) I almost never saw any HTPC recording problem before the frequency change.4) The HTPC actually finds a few more QAM channels than any of my TVs.The attached logs are for this condition: schedule recording on KVOAHD (good channel) and on KOLDHD (bad) to start at 'same' time, KVOAHD first.KVOAHD gets ***** SIGNAL LEVEL: 0, SIGNAL QUALITY: 100 *****KOLDHD gets ***** SIGNAL LEVEL: 20, SIGNAL QUALITY: 100 *****The KOLDHD recording is messed up same as with the analog interference, and TVserver terminates after a while.So it appears I'm getting the same 'interference' when a QAM recording is already in progress as when an analog recording is already in progress, except the signal quality reported is 100 instead of 25. Does this demonstrate that it's not a quality issue?If you'll indulge, it seems to me that this:demonstrates that a simultaneous analog recording (that starts after a QAM recording starts) does cause not the problem.Rather another recording already in progress causes a 'mis-tune', or incorrect setup, of the 103.25 MHz channels, but not the 139.25 MHz channels. Do you agree?I seriously doubt, and you can verify, that TVserver is not setting up the tuners differently depending on the channel frequency.So that DOES seem like the Hauppauge card is not 'taking' the setup correctly under the problem circumstances.Do you agree, and do you think that increased signal strength could help?As for increasing the signal strength, I could (temporarily?) switch the splitter connections at the service entrance, and get +3.5db. Is that enough to make a difference? I could also (temporarily?) remove the splitter between the Sony and the HTPC and get another +3.5db.Any recommendations for a low noise signal amplifier?Thanks again.</blockquote>

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