Thread to discuss 8.3 causing pixelation/audio drop

Discussion in 'TiVo Series3 HDTV DVRs' started by hddude55, May 21, 2007.

  1. richsadams

    richsadams Well-Known Member

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    That's really interesting as that was the recommended "cure" on this AVS Forum thread to correct problems with Comcast cable cards...back in 2005! Hmmm.
     
  2. bareyb

    bareyb Under Maintenance

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    Amps are often a double edged sword. Cable companies rarely use them as they are almost never necessary and can often overboost the signal causing potential problems themselves. It may have fixed the problem by providing a ground. Does your system (the op) have a ground block outside where the cable comes in? If not, install one and remove the Amp and I bet your problems remain solved. Beware of Amps and Ground loop isolators... I know this from personal experience. ;)
     
  3. ml_nelson

    ml_nelson New Member

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    The amp is powered by a "wall wart" which has only a 2 pronged plug. There is no ground connection to the amp.

    Mike
     
  4. ml_nelson

    ml_nelson New Member

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    There is a user on here (matt8268) that swore that pixelation would always be fixed by the addition of an in-line-amp. I decided to give it a try as there were some channels that I would ALWAYS get about 10 minutes of lost program due to pixelation.

    Pixelation stopped the day I put it in. It's been over a year now without problems. I don't have a good explanation as to the interaction between tuner & amp, but in my case it absolutely fixed the issue.
     
  5. bareyb

    bareyb Under Maintenance

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    That's great news for you. Have you tried removing the amp to verify that the pixelation problem comes back without it?
     
  6. ml_nelson

    ml_nelson New Member

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    No. Frankly I didn't see the need. I've had the problem virtually every day for months. It stopped the same evening I put it in & has not been seen since. It's pretty clearly correlated with installation of the amp.

    Mike
     
  7. bareyb

    bareyb Under Maintenance

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    Unless you verify that the problem comes back when you remove the Amp then unfortunately, this proves nothing. It could very well be a coincidence. I owned a cable business for years and you'd be surprised at the number of "voo-doo" fixes I saw that nobody could explain. I'm not saying the Amp DIDN'T fix your problem, but unless you can verify it was the Amp that did the fixing, there's no proof the Amp did anything at all. It could very well be you moved a particular connector just right and increased the signal level. Perhaps Comcast did something right around that time that fixed your problem. It could be any number of things. This would be the first case I've seen where an Amp did anything useful at all. I often solved problems by taking them OUT. I never once solved a problem by putting one IN. I actually kind of hated the darn things. They really shouldn't ever be needed. If your signal is that low the cable company should do something from the pole.

    I hope it did fix your problem, but I'd hate to see people install one of those damn things in their cable system thinking it might improve things for them too. Often times Amps do more harm than good by over driving the signal to such a degree the VIT can't deal with the overload. In the case of TiVo this could actually cause pixellation to increase. There are any number of posts on here about people solving reception problems by removing such things as Amps, Filters, and Ground Loop Isolators. So I guess I'm just saying to folks to proceed with caution. It may have fixed your problem but it could very well become a trouble shooting issue down line for somebody else.
     

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