Fox Pixelation on Tivo Bolt OTA AND DirecTV

Discussion in 'TiVo Help Center' started by finstead, Sep 12, 2019.

  1. finstead

    finstead New Member

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    I may be using the term Pixelation wrong: the screen shows occasional bursts of rectangular areas of multicolored noise. The problem initially manifested in our recordings on DirecTV of So You Think You Can Dance--extremely distracting. Tech support suggested replacing the Genie, but we did not because of the large number of recorded programs we would lose. And inertia. We are now transitioning to the Bolt OTA and notice the same, albeit less severe problem in viewing the recordings. On viewing live shows in the morning (SYTYCD is recorded in the evening), there is minimal pixelation on the Bolt, and less so on DTV. Recordings of other programs either on DTV or Bolt do not manifest the same pixelation.We use our former rooftop antenna mounted in the attic of our 2 story house which gives us an antenna strength of 75% on Fox; I do not know how to view SNR on the Bolt. Antenna web recommends a small multidirectional antenna. While there are barrel connectors in the coax feed, I have removed all splitters. None of the other channels with similar signal strengths give similar problems. While I could alter the antenna, I am curious about the relative isolation of the problem to Fox on 2 dissimilar systems. TIA for any help.
     
  2. ThAbtO

    ThAbtO TiVoholic by the bay TCF Club

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    After the repack of OTA signals, there has been more pixelations. It may be due to interference on the airwaves.
     
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  3. kpeters59

    kpeters59 Well-Known Member

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    Is there any optimization of your antenna where the issue doesn't occur? (on that channel specifically?)

    -KP
     
  4. finstead

    finstead New Member

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    South...
    Thanks. This makes sense. Would increased signal strength help if this is the case? Also, is the feed from DTV also subject to the repacking/compression situation?
     
  5. finstead

    finstead New Member

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    Thanks. I am not certain what you mean by optimization of the antenna. I am planning to try a different attic antenna to see if that helps.
     
  6. ThAbtO

    ThAbtO TiVoholic by the bay TCF Club

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    Amplifiers don't really work on digital signals, and if it did, it would also amplify the noise.
     
  7. kpeters59

    kpeters59 Well-Known Member

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    What I mean is, can you adjust the pixelation out of the picture by fine-tuning the antenna orientation?

    -KP
     
  8. ThAbtO

    ThAbtO TiVoholic by the bay TCF Club

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    Nope.
     
  9. dlfl

    dlfl Cranky old novice

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    I think @ThAbtO 's answers, although frequently correct, are a little too broad brush.

    Antenna type, location and pointing can make a difference (i.e. change the amount of pixelation) in cases where the signal strength or SNR are marginal.

    Amplifiers "work" (i.e., amplify the signal -- and noise) on digital broadcast signals. It's just that if the problem is poor signal-to-noise (SNR), amplification doesn't improve things. There can be situations where amplication will help, e.g., a distant (weak) signal received with a high gain directional antenna (so the SNR is good but the signal strength needs increased.)

    Go to RabbitEars.Info and check out the strength, directions and frequencies of the stations you normally receive. Is the Fox station in a different direction than the others? Could it have been changed to a VHF frequency as a result of the repack? VHF stations need a larger antenna than UHF stations because of their longer wavelengths (lower frequencies). Direction and frequency could be factors that make the Fox station harder to receive. Of course none of this can explain any differences you see on DirectTV, only the OTA effects.
     
  10. finstead

    finstead New Member

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  11. finstead

    finstead New Member

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    Jan 1, 2008
    South...
    Thanks to all for a most informative discussion. Here is the latest in my specific situation. The problem was pixelation on channel 11 only. Per antenna web, the antenna was oriented to 18 degrees; the other channels requiring that orientation showed no problems. I then discovered that the channel 11 broadcasting power was less than ½ of the other 18 degree channels. Notwithstanding the advice to the contrary, I installed a Radio Shack amplifier on the antenna mast; the received signal dropped and the pixelation increased! Off came the amplifier. I then replaced the coax connectors although I knew them to be good because I had installed them myself. 15 years ago. Lo and behold, the signal strength increased and the pixelation has gone. One of the first recommendations people made regarding signal quality was to check all connections; I initially ignored this. My bad. Thanks again.
     
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  12. ThAbtO

    ThAbtO TiVoholic by the bay TCF Club

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    Aged/loose connections can also be a factor.
     
  13. dlfl

    dlfl Cranky old novice

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    Yep, I've had puzzling experience that verifies that. Even some inside connections that are never subject to moisture or jiggling can just go bad over time while others don't. And poor connections do strange things like affecting different channels in different ways, or only acting up at random times.
     

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