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Tivo HD Pixelation Troubleshooting

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

  1. Dr_Diablo

    Dr_Diablo Dr_Diablo

    Nov 23, 2003

    Boy that sure looks like what I had to endure with BrightHouse here...

    The broadband service ain't nuttin to brag about either...

    I'm paying for 10 MB downstream... on a good day I get 4 MB... geeze
  2. bkdtv

    bkdtv New Member

    Jan 9, 2003
    Be sure to sign up @ http://www.tivo.com/priority/
  3. traig

    traig New Member

    Apr 4, 2007
    So I bought a new Tivo HD from Best Buy (had some gift cards to use) Sunday. Fios tech came out Monday and switched out the Motorola box for two cable cards (I don't know who makes them, I wasn't there for the installation). I got home, redid the guided setup, and started surfing. Right away I saw the pixelation / macroblocking on ESPN HD and TNT HD. It would be awful for ten minutes and then all but go away for a little while. Strangely enough I didn't see it on WRC's/NBC's HD. I was running 8.1.7c2-01-2-652.9.1.

    I researched the issue yesterday and found many other sufferers. I jumped on the priority upgrade page, signed up, and last night got 9.1-01-2-652 installed. I rebooted and checked out the digital channels again. Much to my dismay I saw the problem was still there.

    About an hour after that reboot I went to diagnostics and wrote down these numbers:

    Tuner 0
    Sig str 100 (never changed)
    SNR 38 dB
    RS Uncorrected 671
    RS Corrected 263
    Time since signal lock 1700 seconds (and counting)
    CableCARD 1

    Tuner 1
    Sig str 50-100 (lots of flux, generally in the 60s and 70s)
    SNR 30-35 dB fluctuating
    RS Uncorrected 13285
    RS Corrected 414004
    Time since signal lock 320 (and counting)
    CableCARD 2

    Any ideas here guys? Is it likely a bad card? When I saw this the other night, pre update, and looked at the diagnostics, I thought I saw the issue on both tuners but maybe I didn't. Do the numbers I have here indicate one possible cause over another?
  4. greggt007

    greggt007 New Member

    Dec 8, 2005
    fios NoVa
    i had the fios dvr for 10 days and there was some pixelation occasionally, so when i switched to tivohd, i thought it was just fios. but last night i hit the tivo button and the main menu shows up all pixelated! obviously, not fios. no audio dropouts, and honestly it doesnt bother me much, compared to the stuttering problem i had with 9.1 and my tv's stuttering problem which was recently fixed. i feel blessed to only have video pixelation!
    signal strength is always 100 from what i've seen

    espnhd is the worst, seems the lower half of the video is almost out of sync...watched some poker and slow framed and when they switched cameras, a couple frames later, the previous camera frames shows up almost exactly 50% of the screen image and lower, only for 2 frames or so.

    other channels are not this bad at all. i'm confident it will be worked out in the future either by fios or tivo
  5. richsadams

    richsadams New Member

    Jan 4, 2003
    There have long been reports about ESPN HD having problems, but pixelated menus are NOT just a "bug". If you're seeing that something is wrong. If it continues you should get on the phone w/TiVo...it probably will not get better and could get worse. You may be entitled to a replacement either from TiVo or wherever you purchased your TiVo HD.
  6. mazman

    mazman Member

    Nov 13, 2002
    I had the same problem which was fixed by getting a replacement Tivo under warranty.

    Take a channel on Tuner 1 which is giving you lots of RS errors and tune into it on Tuner 0. If you don't get the RS errors on Tuner 0 you probably have a tuner problem.
  7. bud8man

    bud8man Tivo Evangelist

    Feb 12, 2004
  8. richsadams

    richsadams New Member

    Jan 4, 2003

    SCSIRAID New Member

    Feb 2, 2003
    The Tuner 0 numbers suggests tuner overload. Try attenuating the input. You could add a 4way splitter to the cable going to the Tivo.

    It could also be a bad tuner. I suggest you try attenuation and then go from there.
  10. eggpro

    eggpro New Member

    May 22, 2007
    Put myself back on the list as well.. I have 2 series 3 tivos 4 cable cards, both with the same issues.. I live in Chino Ca. with fios. Ive had it get bad in some hd channels ESPN HD and TNT HD and other hd channels in the 800s. sometimes its in the lower channels like 89 81 83 100 102 103. For a while it was only happening in the heat. now that its a little cool it still does it from time to time. Happening for 3 days and not happening again for a month.. I dont get it. its done it on all software ive had in it. I've had fios tech there and been on the phone with Tivo for hours even changing out one of my boxs. Whos problem is it? mine? Fios? Tivo? Sometimes it gets frusrating but. I deal with. I dont have much of a choice till something gets fixed.
  11. Joybob

    Joybob New Member

    Oct 2, 2007
    Theory: Only popular TV shows get pixelation.
    Evidence: House MD always gets pixelation despite being SD while WealthTV comes through perfectly clear.
  12. Zathrus

    Zathrus New Member

    Nov 6, 2002
    We've been having intermittent pixelation and channel loss on both HD and digital cable channels for about a week now. On digital cable we tend to see macroblocking; on HD we see horizontal lines of pixelation and audio drop outs. In some cases it's gotten bad enough that we couldn't tune to some HD channels at all.

    It's sporadic, such that the one time we've scheduled someone to come out we had to cancel the appointment -- two hours before the appointment it was awful, an hour before it was just fine.

    This is on Charter cable in Roswell, GA. Seems to have started happening about the same time the S3 got the 9.2 update. Personally, I suspect the cable signal quality has gone down (with mild, but watchable pixelation we were seeing 54-59 signal quality and 26 dB SNR), but I wanted to see if anyone else was seeing anything like this.
  13. bkdtv

    bkdtv New Member

    Jan 9, 2003
    If you have FiOS, add one or two attenuators to eliminate the problem.

    Pack of attenuators for $12.99
  14. joysmahal

    joysmahal New Member

    Oct 4, 2007
    I use my THD with regular analog cable and OTA antenna. I've had it for about a month and I had no issues with the OTA HD channels before.

    When I updated to 9.2 last week, I'm getting a lot of pixelation/macroblocking. It's pretty annoying. If I switch tuners and use my internal tuner on my TV (Sony Bravia XBR1), the digital channels picked up through the QAM tuner are just fine. I'm only having problems now with OTA since I updated to 9.2 :(
  15. madoverlord

    madoverlord New Member

    Jun 29, 2004
    This is very interesting. I was getting the "freeze/fastforward" problems every 5-10 mins with 9.1 (and started seeing a lot more digital hits when 9.0 came out). But since I got 9.2, this issue has almost totally gone away - I only see an occasional minor digital hit, maybe one per hour or so.

    I have a good signal, 93-95 on the meter, 35db.
  16. SDJack

    SDJack New Member

    Oct 20, 2007
    I seem to be having a similar experience as Madoverlord... I was getting occasional brief HD macroblocking and audio dropouts about every 10 min with 8.3 (S3, 2 SA S-cards), then it changed to the "jump-ahead" thing about the same frequency with 9.1. Now, with 9.2.J, I've watched many hours of stuff recorded with no macroblocking or skips.

    For the fellow with the ~55 signal strength, I'd say that is too low... time to call your cable tech and see if you can get that signal up in the 90s.
  17. srcohen

    srcohen New Member

    Sep 23, 2004
    Just want a add a weird pixelation resolution.
    Have 9.1; Series III; 750MG Seagate External.
    Wanted to add antenna-accessible channels, so added a cable line out from the tivo to antenna. Prior to this had zero pixelation problems.
    Immediately began to see pixelation on digital channels - though not on hd channels. Got so bad that many digital channels were black screen!
    Disconnected the out-cable and pixelation went away immediately.
    Anyone have an explanation??

    SCSIRAID New Member

    Feb 2, 2003
    That has been discussed before. Cable and OTA share the same frequencies. If the signal strength of the antenna is high then it could interfere with the cable signal and cause problems. To be definitive, you could go into the diagnostic menu while watching a channel with the problem and watch the SNR when you add and remove the antenna cable. You will probably see the SNR drop with the antenna attached. You could attenuate the antenna and have it work OK.
  19. gibbyscott

    gibbyscott New Member

    Jul 12, 2004

    Ugg... I tried this and no effect.... still pixel like crazy. I have FIOS and I am having pixel on only 5 HD channels... the rest are fine... it is driving me crazy... TivoHD with 9.2j
  20. Daxel

    Daxel New Member

    May 13, 2002
    So... I tried an attenuator. I got the pack of 3, 6, 9, 10, 20. None of them seem to do anything. The signal strength on the HD channels hovers in around 66-72, the non-HD Channels are (with attenuator) at 90+.

    Should I consider replacing the entire interior cable run? I have FIOS, so the box is in my house. If I am replacing the cable, which brand/type of COAX has the least loss?

    Is this problem caused by the Tivo? Is it just that sensitive? Why does it only appear "sometimes" and on on some channels?

    Thanks for any input.

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