Worse reception with Roamio OTA?

Discussion in 'TiVo Roamio DVRs' started by Buckav9/9, Jan 19, 2016.

  1. SomeRandomIdiot

    SomeRandomIdiot New Member

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    At that location you most likely have a direct line of site to M Wilson, but you might be getting a secondary bounce from the Santa Monica Range dropping your signal quality.

    I bet if you made a list of the channels in the 2 rooms, one room would favor the Mt Wilson transmitters and the other room would favor other Transmitter locations.

    How high are you (you know what I mean....not Colorado Rocky Mt).
     
  2. nycityuser

    nycityuser Member

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    Dec 30, 2004
    New York, NY
    No, no, I don't do drugs...:)

    I should mention that I use indoor antennas situated near windows - one is taped to a window. Each TiVo machine has its own antenna. I am on the 2nd floor of a two story duplex. But I am in the "flatlands" as is CBS.

    Both antennas are aimed at windows facing north.

    I live at this location part-time. I noticed that during this "trip" the Roamio is doing better on reception. It's getting just about every channel I try to watch without issues. The PBS stations used to be a problem but I've recorded "Washington Week" and "McLaughlin Group" on various channels without issue this time.

    Meantime, the Premier in the other room is having problems with Channel 4 and Channel 7. The problems are intermittent. Sometimes a show on Channel 4 might be fine; other times it is unwatchable. My nightly recordings of Jimmy Kimmel are only watchable on the Roamio.
     
  3. mjh

    mjh Re: Member

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    Dec 19, 2002
    OK. I would buy that as an explanation except for two problematic facts:

    1. every other OTA tuner that I've connected to that location does not experience this problem. Other OTA tuners that I've tested:
      • TiVo Roamio OTA (experiences issue)
      • TiVo Premiere (does not experience issue)
      • TiVO HDXL (does not experience issue)
      • Samsung TV (does not experience issue)
      • Panasonic TV (does not experience issue)
      • Avertv Tuner Kit for Windows (does not experience issue)
      I would think that if overpowering the tuner were the problem then all these other tuners would also experience it. They don't. Only the tuner in the Roamio OTA
    2. The network that's experiencing this problem is one of 4 networks that broadcast from 3 different towers ranging between 4.6 & 5.5 miles away. Two of those networks are broadcasting at 1000 kW (according to antennapoint). The other one broadcasting at that power is not causing any problems on any of my tuners.

    Given the above, do you still think overloading is the problem?
     
  4. SomeRandomIdiot

    SomeRandomIdiot New Member

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    What about KCBS, which you did not mention.

    You do realize that KABC-7 is the only one you mentioned that stayed on VHF in the digital switch in 2009?

    How close are you to the Fairfax Business District? On the second floor you are not that high up.
     
  5. SomeRandomIdiot

    SomeRandomIdiot New Member

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    It's impossible (well virtually) to say for certain what a reception issue is over the internet - only possibilities.

    The flaw to your logic (listed above in bold) is to assume all TV receivers have the same chips and circuits - not to mention shielding, rejection and filters.

    Even TiVo and Cable Supplied STBs at the same location have different signal and quality numbers.

    In fact, Cable Supplied STBs of different types at the same location have different signal and quality numbers.
     
  6. mjh

    mjh Re: Member

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    Dec 19, 2002
    But I don't assume that. It's part of my conclusion: that the chips, circuits, etc in the Roamio OTA can't handle what other OTA tuners can handle. The entire point that I'm trying to make is that it appears that the Roamio has poorer quality tuners compared to other OTA devices that I have. You were claiming that the problem I'm experiencing is due to overloading from the proximity of the broadcast tower. I'm claiming that isn't the problem, but that the problem lies in the hardware that the Roamio OTA uses.

    I can't tell whether or not you agree with me or disagree. In one post you seem to think that its a tower proximity and not from a difference in tuner hardware (e.g. you disagree with me). But now you're suggesting that the issue is from a difference in tuner hardware (e.g. you agree with me). What am I missing?
     
  7. atmuscarella

    atmuscarella Well-Known Member

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    Rochester NY
    I will propose a third and what I consider to be most likely. Your Roamio OTA has an issue specific to it not the Roamio OTA line in general.

    The best any of us can do is recommend things for you to try that may or may not help correct your problem. My recommendation is you try another Roamio OTA unit, if at all possible.
     
  8. mjh

    mjh Re: Member

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    Dec 19, 2002
    I considered that. Tried to get TiVo to send me a replacement. They asked me to provide them an assortment of numbers from the DVR diagnostics, which I provided. Then they concluded that the signal was the problem and not the tuners, and closed the ticket. I do not see how they can conclude that there's no faulty tuners based on the tuner's self reporting data. But they were convinced.

    They did give me an option to purchase another OTA and test with that. I declined.

    Given that I've seen other threads describing this exact problem, and others who have not experienced it, I can think of two possibilities:

    1. Maybe there's a production run that had a problem
    2. Maybe those who don't notice it, aren't experiencing the specific problem. If it weren't for 3 networks, I wouldn't notice it either
     
    Last edited: Jan 26, 2016
  9. shwru980r

    shwru980r Well-Known Member

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    You could buy a Roamio OTA from Best Buy for $50 and see if it has the same issues as your lifetime Roamio OTA. Then you would have evidence to report to Tivo customer support either way. It's highly unlikely that both Tivo's would be defective and you could compare the diagnostic information. You can always return the $50 Tivo to Best Buy when you are done.
     
  10. tucsonbill

    tucsonbill Member formerly known as cranky

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    Tucson
    In the event that you haven't yet solved your problem my dumb question is have you inspected/replaced the cable to your roamio? preferably with the one that gives you perfect reception on your TV's tuner. I've been down a number of rabbit holes looking for problems with my d* setup and it always came down to a bad cable connection somewhere. Worth looking at anyway.
     
  11. SomeRandomIdiot

    SomeRandomIdiot New Member

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    Jan 7, 2016
    I am not disagreeing. I am listing possibilities, as I noted, its virtually impossible to diagnose reception issues on a forum.

    One can only look for what the problems could be and try to eliminate the possibilities one by one.

    BTW, LA has a lot of challenges because of Mt Wilson and then the Santa Monica Mountains blocking the signal in a large portion of LA that most people hear about (Hollywood > WeHo > Beverly Hills > Bel Aire > Westwood/UCLA > Brentwood > Santa Monica > Pacific Palisades > Malibu).
     
  12. nycityuser

    nycityuser Member

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    Dec 30, 2004
    New York, NY
    I did have a problem with KCBS for awhile on the Roamio.

    I'm near Beverly & La Brea. Most buildings around are 2 stories or lower except for a few on La Brea.

    I find that moving the coax wire that goes between the antenna and TiVo has an effect. The antenna taped to a window is in a (mostly empty) closet. I have the coax elevated at points with hangers as that actually impacts the reception.

    It's all very quirky. Been this way for years with the Premiere.

    I'm not that familiar with the technology so am not sure what you mean by KABC being the only channel I mentioned staying in the VHF range. To an old-timer like me VHF always meant channels 2-13. At any rate, my luck with KABC is no better nor worse than the others. I've had issue receiving every channel at various times. Adjusting the antenna or coax would fix the problem and usually result in a new one.

    I should mention that I've also tried a variety of different indoor antennas. I'd read great reviews about one and buy it to test it out. Most of them went back to the sellers as there seemed to be no difference for me.
     
  13. wtherrin

    wtherrin New Member

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    My Roamio was working fine until late December but since I am having problems with several channels around the same frequency range pixilating and being un-watchable. I have had the cable folks check everything several times and even took my TIVO to their headend office only to see the same problems. All signals coming in are fine and all of my tvs with regular cable boxes work fine as does my old Tivo 2. What gives?
     
  14. tim1724

    tim1724 Active Member

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    Temple City, CA
    In analog television (NTSC) a particular channel number always meant the same block of frequencies. So 2-13 were always VHF and the higher numbers were always UHF.

    In digital television (ATSC) the mapping between channel number and frequency isn't fixed. During the NTSC-ATSC switchover many channels moved to new frequencies, but the flexible mapping allowed them to keep their old numbers. KCBS, for example, is still "channel 2" but it's now using the frequencies that used to belong to UHF channel 43 rather than the old VHF channel 2.

    Note that the mapping of ATSC channels can be changed at any time, allowing channels to move between frequences if needed. During the period when NTSC and ATSC coexisted, the KCBS digital signal was on UHF 60 while the analog signal was on VHF 2. When analog was shut off, UHF 60 was part the 700 Mhz band that was taken away from TV (and auctioned off to cell phone companies) so KCBS had to move to UHF 43.


    Fun historical footnote: KCBS started out on VHF channel 1, but had to move to VHF 2 when the government took away channel 1.
     
  15. nycityuser

    nycityuser Member

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    Dec 30, 2004
    New York, NY
    Thank you for the very clear explanation of what's happening. As an aside, KCBS was called KNXT back in the day.
     
  16. tim1724

    tim1724 Active Member

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    Temple City, CA
    Yep, short for "KNX TV" to go along with the CBS radio station. :) And before that it had other names, but those were before my time.
     
  17. jericko

    jericko New Member

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    Dec 31, 2015
    I too am having issues with my Tivo OTA, and its due to being too close to the Towers and having too strong of Signal.
     
  18. MikeBear

    MikeBear Letting my mind wander, luring it back with candy.

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    May 21, 2015
    Mid-Michigan
    https://www.antennasdirect.com/store/Variable-Attenuator.html

    Buy one of these, and adjust your signal level. Or buy some fixed ones, and place them in line. Or if you have a splitter laying around, put that in your antenna line, and just don't use the other output. That will cut your signal by 3db or so, which might be enough.
     

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