very low SNR with TiVo Bolt and tuning adapter

Discussion in 'TiVo Help Center' started by Matt Hoyle, Mar 2, 2018.

  1. Mar 2, 2018 #1 of 29
    Matt Hoyle

    Matt Hoyle New Member

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    Hey, all, I bought a used Bolt via eBay just recently. I requested a cable card via mail from Charter here in western North Carolina and a technician delivered a tuning adapter and tried to set it all up. Long story short, he was unable to get it working successfully. He felt like it was due to a faulty RF input connection on the Bolt. (which doesn't seem loose at all to me)

    He tested with his own coax patch cable and said level/power readings for the line (at the input of the TiVo) were within their norms.

    And now the TiVo has stopped detecting the tuning adapter via USB, also. Anyone have a suggestion? I was considering requesting another tuning adapter but wondered if I just needed to install an amplifier in line somewhere...

    I took a photo of the TiVo's diagnostics screen. At the time, for tuner 0, it showed:
    • SNR: 21dB
    • RS Uncorrected: 67108860
    This is TiVo Bolt 500GB with a Motorola MTR700 tuning adapter.
     
    Last edited: Mar 2, 2018
  2. Mar 2, 2018 #2 of 29
    ThAbtO

    ThAbtO TiVoholic by the bay TCF Club

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    That is rather low SNR (Signal-to-Noise Ratio)

    You will find it higher if you connect just to the TV because it has just 1 tuner, but the Bolt has at least 4 tuners which is split internally.

    Not sure if an amplifier will work since it also amplifies noise as well. Some Cableco can boost their signals.

    Also, how is the tuning adapter connected?
    1. Split between adapter and Bolt,
      or
    2. through tuning adapter to Bolt
     
  3. Mar 2, 2018 #3 of 29
    Matt Hoyle

    Matt Hoyle New Member

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    Thanks for the reply. The signal comes through the tuning adapter to the Bolt.
     
  4. Mar 2, 2018 #4 of 29
    ThAbtO

    ThAbtO TiVoholic by the bay TCF Club

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    Try connecting the coax directly to the Bolt, without the tuning adapter (as a test) and check the signal strength and SNR again.
     
  5. Mar 2, 2018 #5 of 29
    Matt Hoyle

    Matt Hoyle New Member

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    The SNR is moving between 9, 15 and 21, ThAbtO. THis is all on tuner 0.
     
  6. Mar 2, 2018 #6 of 29
    ThAbtO

    ThAbtO TiVoholic by the bay TCF Club

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    Something is not right, it should not be jumping around like that.

    You may need to have the line checked, loose/bad connectors, splitters, leading from the street.
     
  7. Mar 2, 2018 #7 of 29
    Matt Hoyle

    Matt Hoyle New Member

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    This line was connected to a 1-to-3 splitter which served our phone device and a TV box. Bypassing the splitter the SNR is up to 29dB and holding. Now have picture on the TV in the non-digital(?) channels , also. I'm figuring installing an amp in place of this splitter might solve that part of the equation. As for the non-responsive tuning adapter, not sure.
     
  8. Mar 2, 2018 #8 of 29
    Matt Hoyle

    Matt Hoyle New Member

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    Thanks for your reply. Understood.
     
  9. Mar 2, 2018 #9 of 29
    kpeters59

    kpeters59 Well-Known Member

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    Are there any more splitters on the line?

    -KP
     
  10. Matt Hoyle

    Matt Hoyle New Member

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    Mar 1, 2018
    No. Just the 1x3 here in the living room. I'd send a picture if I could! lol

    There's also a splitter outside in the gray box mounted on the side of the house. It's currently serving 2 runs into the house.
    • Run A comes into the living room to the 1x3 splitter and the Bolt.
    • Run B comes into the dining room and directly attaches to a cable box.
     
  11. ThAbtO

    ThAbtO TiVoholic by the bay TCF Club

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    Non-digital channels?
    Bolt only receives digital channels, no analog.
     
  12. dirtsy

    dirtsy Member

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    Under the...
    I'm going to be blunt here, never-ever install an amp thinking it will help anything...you need a new, bi-directional, high quality splitter at the "source". Then also, a new, bi-directional splitter for the cable TV source at the TiVo...one leg goes to the TiVo, the other leg goes to tuning adapter. Then make sure the USB cable is connected between the tuning adapter and the top USB port on the TiVo (from my experience, it could be the bottom port in your case)...Personally, I think BAMF makes a great splitter! Search it on Amazon.
     
  13. dirtsy

    dirtsy Member

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    Under the...
    Wow...this seams like a whole new mess. Just doing the calculus, there is potential for 13-14 bad connectors, and 3? bad splitters.
     
  14. Matt Hoyle

    Matt Hoyle New Member

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    Gotcha.

    Sent from my Pixel XL using Tapatalk
     
  15. Matt Hoyle

    Matt Hoyle New Member

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    The splitter outside is Charter-installed. As is the one near the problem area.

    Sent from my Pixel XL using Tapatalk
     
  16. dlfl

    dlfl Cranky old novice

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    Not sure what you mean by "cable box" for "Run B". Is this a cable modem or a TV set top box? If it's a STB, try moving it to the living room and connecting to the cable that now feeds the TiVo/TA. Does it provide good TV tuning there? if so, this pretty much points the finger at the TiVo/TA setup as the problem. SNR of 29 dB possibly is marginally OK but typical values would be around 35 dB and should be obtained regardless of how you connect (or don't connect) the TA.
     
  17. Matt Hoyle

    Matt Hoyle New Member

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    cable box = TV set top box

    Thanks for the reply, @dlfl .
     
  18. NorthAlabama

    NorthAlabama tabasco rules

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    sounds like a bad splitter inside, and/or possibly cable connector issue(s), but either way, charter should fix this if they were just out. no way the installer should be able to get away with leaving you to fix this mess.
     
  19. Matt Hoyle

    Matt Hoyle New Member

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    Mar 1, 2018
    I'm tending to agree with you now, @NorthAlabama. Installation of an amp has got the Bolt working. Just ordered another tuning adapter via eBay. I figured that would avoid any ongoing monthly charge for it anyway.

    THanks for everyone's comments/suggestions.
     
    NorthAlabama likes this.
  20. HerronScott

    HerronScott Well-Known Member

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    I'm pretty sure that's not going to work for you (like buying your own CableCARD). The Tuning Adapter has to be registered in their system to work and I'm not aware of any cable company allowing you to register your own.

    You might want to cancel that order....

    Scott
     

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