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FIOS TV pixellation fix - attenuate to SNR 31

Discussion in 'TiVo Series3 HDTV DVRs' started by AbMagFab, Nov 19, 2007.

  1. subgenius37

    subgenius37 New Member

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    Nov 15, 2008
    Correct, that is how i have it setup. Pixelation is a result of many different things. I actually believe I needed two fixes the multi-streaming card and the diplexer. I know this will sound weird but the pixelation had a slightly different look to it once I got the multi-streaming card. Hard to describe but the pixelation pattern looked different. Perhaps too much time playing video games. At any rate I think I have a test that may help determine if a diplexer would help, but I only have one sample set (me).


    A test to see if a diplexer would help would be to check to see if there is a direct correlation to increased pixelation and increased internet traffic. Start a large download and/or anything that would increase network traffic, then check the RS Corrections/Uncorrected numbers and/or just the visable pixelation. I was able to find a direct correlation between the two. My wife and I would both be on the internet streaming video or doing anything traffic intensive and boom tons of pixelation. Practically halt traffic and the attenuators did there job no problem, very LOW RS corrections and uncorrected numbers and no visible pixelation.

    Hope this helps.
     
  2. subgenius37

    subgenius37 New Member

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    Nov 15, 2008
    I'll try to post a picture of the diplexer setup later today.
     
  3. substance12

    substance12 Member

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    Feb 6, 2008
    I was under the impression that the diplexer fixed your problem... now I'm reading that you actually needed the M-card as well and that you still have pixelation? or are you saying that without the diplxer, there is a difference between the pixlation using the S and M cards?

    I don't think you're the only sample. I've come across a few random posts that people have reported this working. there's also a post where the user said he/she got the fios tech to put a LPF at the ONT.
     
  4. subgenius37

    subgenius37 New Member

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    Nov 15, 2008
    Correct the diplexer fixed the problem. Multi-streaming did not totally remove pixelation. I was trying to indicate that I thought I saw a difference between S and M and that it possibly could have been a factor.

    I am suggesting that if the diplexer doesn't fix the problem it may also need a multi-streaming card. I also know people that had Comcast had problems with their single streaming cards and that the multi-streaming cards cleared up their problem. Also Comcast and Verizon use the same brand/model of cablecards, Motorola. My original hope was that this alone would fix my problem, it didn't. The diplexer did. Because I can't try the diplexer with a single streaming card I can't say either way if the cable card was a factor in my fix, but it is part of my setup.
     
  5. Ziggy86

    Ziggy86 Member

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    Jun 22, 2004

    Thanks
     
  6. subgenius37

    subgenius37 New Member

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    Nov 15, 2008
    Images as promised.
    The first picture shows the diplexer configuration. The black coax is coming from the wall and the white is going to the tivo HD box.

    [​IMG][​IMG]

    The second is of the DVR diagnostic screen showing a DB strength of 38 and 0 RS corrected and 0 RS uncorrected

    [​IMG][​IMG]

    Hope this helps.
     
  7. exdishguy

    exdishguy New Member

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    Apr 30, 2004
    Well the good news is that I have zero RS uncorrected and corrected errors (well I had maybe 8 on one channel over 10 minutes).

    The bad news is that my local HD channels no longer work! (and I don't mean OTA HD...my Fios HD locals) I had to catch a last minute flight so I didn't have time to further investigate.

    subgenius37, can you verify each of your channels to insure they are ALL coming in? This looks very promising but I suspect the diplexer is filtering out a portion of the band that my local HD channels are on.
     
  8. substance12

    substance12 Member

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    Feb 6, 2008
    what frequency are your local HD channels on? technically the diplexer should only filter those channels out if they are outside the frequency range. what is it? 860ish Mhz on the high end and 5Mhz on the low?
     
  9. exdishguy

    exdishguy New Member

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    Apr 30, 2004
    Dunno until I get home. The channel numbers are 502, 504, 507...in that range. But I didn't have a lot of time to play around with it and I had to hurry to reconnect the attenuators so my wife can watch TV while I'm out of town. I did check 77 MSG, 190 COM, and 250 (some cartoon channel...not sure which one) as they were all my problem channels. I also checked the SD locals on 2, 4, 7 as well as HBO on 899....life was good. But again, I had no signal at all on 502, etc.

    I think this may help to further pinpoint the problem and to give my Fios tech something to work with. I'll reconnect it all up again on Sunday and give see what happens before I call them out again. Argghhh...
     
  10. Ziggy86

    Ziggy86 Member

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    Jun 22, 2004
    Why do you have 2 black wires coming from the wall?

     
  11. richsadams

    richsadams Active Member

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    Jan 4, 2003
    Optical illusion...there's only one coax coming from the wall which loops around to the diplexer in the OP's picture.
     
  12. subgenius37

    subgenius37 New Member

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    Nov 15, 2008
    Correct. I couldn't bend the black coax tight enough to have it all fit in the frame. Btw if you're looking for good cheap coax cable of any length monoprice.com seems to have the best deals.
     
  13. subgenius37

    subgenius37 New Member

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    Nov 15, 2008
    Honestly I'm not sure. I seem to get all the same channels I used to 2 through 800. I'm not sure if channel number relates to frequency though.
     
  14. sinanju

    sinanju Active Member

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    Jan 3, 2005
    You can see what frequency a channel is on by looking at the diagnostics screen while you are tuned to that channel.
     
  15. exdishguy

    exdishguy New Member

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    Apr 30, 2004
    Just got back in town and checked some of the local HD channels. Channel 502 is on 507000KHz and channel 504 is at 513000KHz. Why they aren't showing up with the diplexer is beyond me. The diplexer basically acts as a low pass filter only passing 5-860MHz. Well Verizon gave me a low pass filter that is 5-860MHz and it passes the channels, but I see tons of RS uncorrected errors. With the diplexer, I see no RS errors, yet I cannot see the local HD channels.....friggin' bizarre and frustrating.

    I'll try the diplexer again tomorrow and report back. Maybe I'll wait a bit to see if the local HD channels show up after 15 minutes or so....dunno.
     
  16. ehagberg

    ehagberg Member

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    Dec 27, 2004
    Montclair, NJ
    So I've got FIOS with two S-cards (M-cards weren't available when they did my install or so they claimed) and a Tivo HD, which usually works fine, but I'd been noticing pixellation on a few channels, so I started surfing my HD channels and checking their frequencies to see if there was a pattern with pixellation/errors reported by the tivo diagnostic screen and the frequency.

    Last night around 9 or 10pm I found that channels on 111, 117 and 123MHz were flaking out, but my wife didn't want to bother checking the rest of the channels (we've really only noticed it on HD ones, btw) so I waited until this morning and started checking things again. Strangely enough, the channels on the bad frequencies last night are having no problems whatsoever this morning, but now a different range of frequencies and channels has gone haywire: 327, 339 and 345MHz.

    I do have a diplexer in place as many others have reported using one to filter out signals from the ONT/Actiontec router, but even removing that doesn't affect what I'm seeing wrt the pixellation (or lack of) this morning.

    Has anyone else seen fluctuations like this? Does it sound likely to be something wrong on Verizon's end of things?

    Thanks,
    -Eric
     
  17. wmcbrine

    wmcbrine Ziphead

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    Aug 2, 2003
    Yep.

    Yes, just as it always is.
     
  18. modular46

    modular46 New Member

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    Nov 22, 2008
    I installed 2 TIVO DVR's after multiple verizon DVR problems. As soon as the HD series 3 was installed I saw a lot of digital tiling. But I didn't see anything on the XL. Does anyone know if the XL has been designed to resolve these issues? Is anyone having problems with the XL? I have 14 db of attenuation on the series 3 and it has resolved all tiling issues so far but I'm only watching SD programming right now because it's hooked up to a SD set.

    Has anyone thought about starting a committee or petition to Verizon? I would be interested in setting up a website or some other means to let Verizon know that their DVR's suck and that that we have to go through these issues with TIVO to get good service. I find this situation to be unacceptable. I like many of you have had verizon techs come out and don't know what the hell they are doing and have spent about 20 hours on the phone with verizon and tivo to resolve these issues.
     
  19. exdishguy

    exdishguy New Member

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    Apr 30, 2004
    I have an XL and 2 HDs and have issues with all of them. I wouldn't mind starting a web site or petition right here if we can do it. Then send it to both the FCC and Verizon. I cannot believe Verizon meets CableLabs specs. I wish I could prove that, but I think this is the angle we need to voice our complaint to the FCC and Verizon.
     
  20. ehagberg

    ehagberg Member

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    Dec 27, 2004
    Montclair, NJ
    So assuming this is a Verizon issue, is there something specific I should tell them to fix in order to get things working reliably?

    Interestingly, at the moment, I have no pixellation (or errors) on either the low-100MHz or the mid-300MHz range at all. I imagine that'll swing one way or the other later in the day again.
     

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