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Tivo HD Pixelation Troubleshooting

Discussion in 'TiVo Series3 HDTV DVRs' started by Chimpware, Aug 3, 2007.

  1. Sep 4, 2007 #221 of 1597
    Dr_Diablo

    Dr_Diablo Dr_Diablo

    916
    0
    Nov 23, 2003
    Midwest
    Starting a file "case number" with your Tivo would be a wise move... I recently purchased the Tivo HD... Had all the problems you now face... Returned it for a Series 3, problems haven't cleared up but with any luck the next "update" will resolve these issues.. maybe
     
  2. Sep 4, 2007 #222 of 1597
    Brighton Line

    Brighton Line Member

    143
    0
    Mar 15, 2006
    Brooklyn, NY
    Here is what I face, Sept. 7th is the deadline to return the TivoHD to C-City (30days). The 10th is my 30days with Tivo service.
    I did call a week ago and they refused to extend the 30days service refund period. Then the CSR talked to a "supervisor" and they opened a case, she said they would replace the box if the issue is not resolved.
    I asked how can you replace the box when it was a software issue? I then got the reply that a software fix is in the work etc etc.
    I'm calling on the 7th to cancel and see if they will extend the 30 days and warrenty period otherwise it is going back to C-City. If they do right I'll take the chance and keep the box and if they don't fix it I have a good christmas gift for my parents who are on Time Warner with Moto cards.
     
  3. Sep 4, 2007 #223 of 1597
    adam84a

    adam84a Bright House Hater

    2
    0
    Aug 30, 2007
    Tampa, FL
    As much as I hated to, I had to finally give up on my TiVo HD last Friday because I could not stand the pixelation (not to mention I was having problems with my provider and getting all of my HD channels in). It really is sad because it would be a superior product if it weren't for this issue. I probably would have held out a little longer waiting for the update but my wife had enough of not being able to watch more than a minute of tv without the nasty pixelation. Hopefully they can get this ironed out and I can try it again later.
     
  4. Sep 4, 2007 #224 of 1597
    cmajor9th

    cmajor9th New Member

    2
    0
    Aug 27, 2007
    Boca Raton, FL
    Well, mine's going back in the box to BB. I'm caught between two incompentencies.. pixelation from the TiVo and the inability for Comcast in Palm Beach Co FL to authorize the SA cableCARDs for all channels my digital channels in spite of multiple visits and pleas for knowledgeable help. (Maybe the same as adam84a?) I guess Comcast wins this war of attrition, and it's back to the 8300...
     
  5. Sep 5, 2007 #225 of 1597
    jbsails

    jbsails New Member

    3
    0
    Aug 28, 2007
    I posted last week about pixelation with 2 moto S-Cards and the b2 update. I mentioned my signal strength was 100% and in a reply someone said it maybe "too hot". It wasn't something I even considered since the house already has a 5 way splitter, but I took the suggestion of getting a standard 1ghz splitter for $5 and dropping it on the line to the HD Tivo (essentially splitting it 2 more times). My signal went from 100% to 96-99% and all the constant pixelation I was getting on every standard channel has disappeared! I still get random pixelation on HD channels, but it is certainly watchable and only happens once or twice. I usually switch over to the standard channel and watch the same program until it goes away on the HD channel. I have noted that when the pixelation happens on the HD channels the signal strength drops to 50-55% on that tuner. Really the only pain was switch my season passes over to SD channels so that I was sure not to get pixelation in the recording.
     
  6. Sep 5, 2007 #226 of 1597
    jmpage2

    jmpage2 New Member

    1,951
    0
    Jan 20, 2004
    Interesting. I believe it was mentioned that this hot level should only occur with feeds from FIOS. Are you on FIOS? If not maybe the level is too hot at your head end.

    I wonder if anyone makes an affordable inline attenuator for coax as that would be a more desireable way of reducing the signal level than throwing in a cheap splitter (which is also kind of an attenuator, but probably -3dBm).
     
  7. Sep 5, 2007 #227 of 1597
    btwyx

    btwyx Substantive Member

    11,331
    0
    Jan 16, 2003
    Mountain...
    Ratshack make a inline variable attenuator, basically a little box with 2 coax threads and a knob on top. It works for checking things like too hot a signal.
     
  8. Sep 5, 2007 #228 of 1597
    bkdtv

    bkdtv New Member

    7,902
    0
    Jan 9, 2003
    DC Metro Area
  9. Sep 5, 2007 #229 of 1597
    richsadams

    richsadams Active Member

    8,893
    2
    Jan 4, 2003
    I think this is what btwyx is talking about...

    [​IMG]

    It's fairly cheap but might serve the purpose. I used to use it to control the red push on a Mitsubishi big screen we had. I've never tried using it with TiVo and its low-quality might cause other issues, but it might work well enough to see if the signal is too strong.
     
  10. Sep 5, 2007 #230 of 1597
    bkdtv

    bkdtv New Member

    7,902
    0
    Jan 9, 2003
    DC Metro Area
    If you are seeing 99-100 on some channels, your signal on those channels could still be too 'hot' (strong). In that case, you might even try adding another splitter. Or you might buy a better attenuator to replace the splitter that you added. Be aware that not all attenuators are created equal, however.

    Verizon may have some splitters / attenuators you can try if you don't want to buy one.

    Got a part number for that, by chance?
     
  11. Sep 5, 2007 #231 of 1597
    richsadams

    richsadams Active Member

    8,893
    2
    Jan 4, 2003
    The only numbers I find on the unit itself are "15-6 8" printed on the front and "11A00" on a sticker on the back. I looked on line and couldn't find it...not sure if they sell it any more.
     
  12. Sep 5, 2007 #232 of 1597
    jbsails

    jbsails New Member

    3
    0
    Aug 28, 2007
    I am on FIOS. The installer had never installed cable cards before nor did he know anything about Tivo so this has been a bit of trial and error on my end.
     
  13. Sep 5, 2007 #233 of 1597
    jfh3

    jfh3 New Member

    4,469
    0
    Apr 15, 2004
    Denver area
    Tivo just released the c2 software level. Early reports indicate that the pixelization issues are much improved, if not fixed.
     
  14. Sep 5, 2007 #234 of 1597
    jesseg

    jesseg New Member

    8
    0
    Mar 16, 2007
    Brooklyn, NY
    don't return your tivo HDs! i just updated and in the twenty minutes i've been watching discovery hd theater, i've yet to see any of the pixellation that used to happen a couple times a minute! this is really great! by the way, i have two SA cards with time warner in brooklyn.
     
  15. Sep 5, 2007 #235 of 1597
    bkdtv

    bkdtv New Member

    7,902
    0
    Jan 9, 2003
    DC Metro Area
    Scientific Atlanta CableCard pixelization issues appear to be solved (eliminated), based on the dozen or so initial reports.
     
  16. Sep 6, 2007 #236 of 1597
    lrhorer

    lrhorer Active Member

    6,924
    0
    Aug 31, 2003
    San...
    No, signal levels which are too high can occur with any CATV plant. That said, most CATV systems are designed to deliver about +3dBmV to the eave of the house on the lowest (in signal strength, not necessarily frequency) channel. Most CATV operators are probably running their digital carriers 10dB lower than their analog carriers, so that would put the minimum digital carrier at no less than -7dB. If the lowest channel in the spectrum is significantly higher than this, then it's likely the CATV plant is not properly balanced, and the answer is not to place attenuators in-line, but to get the CATV company to balance the system. I usually have to have the local CATV company balance the plant every couple of years or so, although in a t least 2 cases it has been the upstream gain which was out of whack, not the downstream levels.

    Take note what can happen is the equalization is off, not just the overall signal level. In this case the difference between the lowest channel and the highest channel is too great. Without an attenuator, the highest signal will be too high, but with the attenuator the lowest signal will be too low. After allowing for the difference in levels between analog an digital signals, the lowest shannel should not be more than 9dB lower than the highest channel. If your house is close to the amplifier, the higher frequency channels will be higher in level than the low frequency channels. Further away from the amplifier, the signal will begin to tilt the other way, until at the very end of the feeder line, channel 2 will be as much as 9 dB higher in signal level than the highest frequency carrier on the system. Doing a quick calculation in my head, I get that in a 750MHz system, no tap should be more than about 800 - 900 feet from the amplifier, although with the greatly shortened cascades allowed by fiber nodes, some companies might be able to get away with 1000ft feeders.

    'Not dBm, dB, and it's more like 3.5dB and closer to 4.0dB as one exceeds 400MHz. This company has them for $9 for a pack of 4, which is a decent price. The thing is, you have to buy 4, and I don't know about shipping: http://sadoun.com/Sat/Products/S/20DB-Attenuator.htm
     
  17. Sep 6, 2007 #237 of 1597
    richsadams

    richsadams Active Member

    8,893
    2
    Jan 4, 2003
    Excellent info (as usual). Thanks! :up:
     
  18. Sep 6, 2007 #238 of 1597
    Unix_Beard

    Unix_Beard New Member

    566
    0
    Dec 22, 2003
    Well, I'm experiencing severe pixellation. It did it on occasion when I first got it but now its a regular occurence. And its not just a few times, its constant through the entire program making it unwatchable. It didn't annoy the hell out of me until tonight when I tune into the NFL opener on NBC HD and its completely unwatchable. I've recorded "The Departed" from HBO HD 3 times now. Each time pixellated and unwatchable.

    So I rebooted it tonight. It said it was installing a service upgrade. Just as pixellated as before. The update made no difference for me.

    My upstairs HDTV is showing the raw free HD cable crystal clear.
     
  19. Sep 7, 2007 #239 of 1597
    bkdtv

    bkdtv New Member

    7,902
    0
    Jan 9, 2003
    DC Metro Area
    Can you confirm on the System Information screen that you have 8.1.7c2?

    Also remember that the new update only addresses the issue for live TV and new recordings made after the update. It does not 'fix' recordings made before the update.

    If you are still seeing pixelization on new recordings made after the 8.1.7c2 update, have you tried plugging the TivoHD in to your cable line upstairs? There could be a signal problem with your cable feed downstairs. Recall that the TivoHD is more sensitive to signal problems than the cable company box.
     
  20. Sep 9, 2007 #240 of 1597
    damonnoah

    damonnoah New Member

    10
    0
    Aug 19, 2003
     

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