1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

New tivo will not tune channel being broadcast only 1.4 miles away!

Discussion in 'TiVo Premiere DVRs' started by tvoe, Jul 28, 2012.

  1. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    It's a royal pain, but try that direction antenna 45 degrees off of straight at the towers. Then try 90 degrees. Then keep going in increments of 45 degrees until you've come full circle.

    That's mostly to eliminate the unlikely.

    Then redo Guided Setup and give it a different zip code for an area where the problem channel is still available OTA, although the farther away the better perhaps, or maybe better yet, a zip code for an area of the country where an entirely different station is available on that same frequency.

    If the good channel and the bad channel are only separated in frequency by the same amount that the old analog channels 8 and 9 were (6 MHz), there's almost no way it's a hardware problem, especially one that's also present in the replacement box.

    So I'm thinking "software that runs the hardware" problem, and since this isn't happening to TiVo owners all over the country, I suspect the problem is in the software specific to your location.
     
  2. tvoe

    tvoe New Member

    34
    0
    Jul 28, 2012
    The attached graphic (if it posts correctly) shows the TV transmitter at the balloon and my house at the black hand-drawn asterisk. Note that the coverage is considered "very strong" by the color coding. This is why I'm hesitant in thinking that buying a better rooftop antenna is going to solve this problem...
     

    Attached Files:

  3. tvoe

    tvoe New Member

    34
    0
    Jul 28, 2012
    Now that I've figured out how to get graphics posted I thought I would also include the full data on the stations for people to scrutinize. KRTV and KUGF come through fine of the tivo, KFBB is the problematic channel. (Note, if I'm interpreting the power column correctly, that it is the strongest.)
     

    Attached Files:

  4. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Only the TiVo has the problem.

    Even in a different location the TiVo still has the problem.

    Replacing the TiVo does not fix the problem.

    So it's something common to both TiVos.

    Something is keeping the TiVo from tuning the tuner to the right frequency I suspect.

    Which is why I suggested the Zip Code lie as a troubleshooting technique.

    If people all over the country couldn't get real channel 8 on their TiVos, we'd have heard about it by now, and TiVo would definitely have heard about it by now.
     
  5. S3-2501

    S3-2501 New Member

    205
    0
    Jun 2, 2007
    To test if it's the zip code data that's preventing the station from being tuned, a full manual channel scan could be done. I have done this in the past on my Series 3 Tivos when physical or virtual channel assignments or lineups have changed but Tribune has not yet provided updated data. The Tivo always found and displayed the new channels, but there was obviously no guide data. I don't know if the process is the same on a Premiere, but on a Series 3 you go to messages and settings->Settings->channels->Channel scan.

    Unfortunately the scan takes a really long time because it also scans for cable channels, but if it hasn't been tried before this could force the Tivo to locate the channel on a different frequency or with different PSIP data.
     
  6. tvoe

    tvoe New Member

    34
    0
    Jul 28, 2012
    Tried a zipcode for a town 30 miles away - got the same results.
     
  7. tvoe

    tvoe New Member

    34
    0
    Jul 28, 2012
    OK - tried a zip code in a different part of the country that broadcasts ABC on channel 8. During the guided setup, the Tivo is now STUCK on "Beginning antenna channel scan. Please wait" How do I get it off of this screen?
     
  8. S3-2501

    S3-2501 New Member

    205
    0
    Jun 2, 2007
    If it's really stuck I guess you may have to pull the plug and start over. During guided setup, the Tivo isn't really scanning for channels, it's just going through the zip code's lineup data and checking to see if you get the channels included in that data. It's possible the the combination of frequency and PSIP data in the "fake" zip code data didn't mix well with the actual received signal and froze the software and/or tuner.

    Just doing a manual channel scan will find and add any new or moved OTA channels that aren't (or weren't) present in Tribune's lineup data regardless of the zip code used during gudied setup.
     
  9. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Thanks for jumping in with actual digital channel hunting experience.

    I'm still pretty sure/almost absolutely certain I'm right about what's wrong, the trick is proving it.

    (the alternative is that both his location has a problem and the first TiVo that he tried in a different location as well with the same results also had its own problem that caused the same strange symptoms.)
     
  10. tvoe

    tvoe New Member

    34
    0
    Jul 28, 2012
    OK - bogus zipcode finally went through on setup. Problem was I thought that this zipcode had a true digital frequency of 8 in the area, but it turns out that was the NTSC channel and that it really was frequency 7 (which happens to be my "good" channel here).

    Experimenting with this set-up, I get a strong signal strength on this bogus channel 8 (true digital freq 7) but no picture at all (must be due to the conflict of the downloaded info versus the OTA info). After a channel scan, I get channels 3-1 and 3-2 fine as before (these are digital freq 7), and the signal strength is an exact match for the bogus channels on frequency 7.

    Channel scan returns a "hit" for the troublesome channel at 8-3 and 8-4, with same signal strength issues as before. (These have never shown up and 8-3 and 8-4 before, but I assume the bogus zip's channels 8-1 and 8-2 bumped them down to 3 and 4?)

    Retrying another bogus zipcode that actually has digital frequency 8 now. Will report back.
     
  11. tvoe

    tvoe New Member

    34
    0
    Jul 28, 2012
    Used a colorado zip code that had channel 8 for pbs. When on this channel, get a "problem with the signal" message on 8-1 and 8-2 - although it did show a pixelated abc broadcast for a moment or two.

    The Tivo is not liking these shananigans. When I go to setup and channels, I get a "please wait" message that will not go away!! So I cannot access the signal strength, do a channel scan, or enable any other channels. Kind of stuck again.... :mad:
     
  12. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Try it again with the paper clip as a poor man's attenuator.
     
  13. tvoe

    tvoe New Member

    34
    0
    Jul 28, 2012
    The entire guided setup or just a channel scan with a paper clip?

    Thanks for your patience...


    Update from earlier: after putting the box into standby and unplugging for a few minutes, I was able to finally access the channel settings. 8-1, 8-2, 8-3, and 8-4 all have the bogus Colorado call letters and give a signal strength between 10 and 20, which was the strength I was getting with a legit zip code for 5-1 and 5-2 on digital frequency 8 before.
     
  14. tvoe

    tvoe New Member

    34
    0
    Jul 28, 2012
    I went ahead and tried it with guided setup. Locked in all my channels with the paperclip:
    3-1 and 3-2 strength 65-70 (normally 85-95)
    21-1 to 21-4 strength 40-45 (normally 75-85)
    5-1 and 5-2 strength 10-20 SAME AS IT ALWAYS IS!!! :(

    Tried hooking up the "real" antenna after the setup and 5-1 and 5-2 still aren't coming in.
     
  15. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    If the exact same cable from the antenna plugged directly into the TV gives you that channel, and this is the second TiVo that won't with that same antenna feed connected, and the first wouldn't do it in a different location either, then one way or the other it has to be TiVo's fault.

    Maybe the adjacent channel rejection figures on the tuners are terrible compared to your TV, and that's causing some problem, but your TV proves it can be done, so TiVo owes you an explanation of why they can't.
     
  16. a68oliver

    a68oliver Member

    431
    0
    Jul 15, 2000
    Crawfordsvil...
    I am baffled by your problem. Have you contacted the station engineer to see if he has any ideas?
     
  17. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    Does that attic antenna have a built-in amplifier?
     
  18. tvoe

    tvoe New Member

    34
    0
    Jul 28, 2012
    Yes, it has an an in-line ac-powered amplifier that came with it. I've attached it both at the distribution for the whole house and right before the tivo box with a dedicated line from the tivo to the antenna. I've also tried without the amplifier plugged in or attached at all.
     
  19. unitron

    unitron Active Member

    16,387
    2
    Apr 28, 2006
    semi-coastal NC
    The second post here:

    http://boards.radio-info.com/smf/index.php?topic=217405.0

    made me think I might have been on to something.

    But if you bypassed it...
     
  20. worachj

    worachj Active Member

    1,139
    2
    Oct 13, 2006
    Eagan, MN
    References:
    http://transition.fcc.gov/fcc-bin/tvq?call=KFBB
    http://transition.fcc.gov/fcc-bin/tvq?call=KRTV
    http://wiki.answers.com/Q/Are_indoor_digital_TV_antennas_directional


    I know its frustrating because you get good reception on other devices and its just the TiVo that's problematic. So here I am pissing in the wind with some thoughts......

    Looks like KFBB and KRTV are on different towers but at the same site. Your direct line of site may be slightly different for the two channels.

    KFBB broadcasts uses a non-directional antenna(make: SCA), KRTV broadcast on a directional antenna(make: DIE).

    You're in a mountain area and most likely have multi-path issues with signals bouncing off hills/mountains.

    The Premier TiVo is the weak link in your setup, and I heard rumors that the Premier TiVo doesn't do as well with multi-path issues.

    Rabbit ear antennas are not particularly directional and can pick up shadow signals bouncing off of trees/hill/mountains.

    Is your attic antenna directional?

    The Tivo is your problem, so because of location/Premier TiVo/antenna/multi-path issues you may need a directional antenna pointed directly at the towers for your new TiVo to work.
     

Share This Page