Does this look right

Discussion in 'TiVo Help Center' started by timchi29, Apr 9, 2020.

  1. timchi29

    timchi29 Member

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    Will this work, or are the ones on Amazon you provide better for MOCA.

    Fry's Electronics |
     
  2. kpeters59

    kpeters59 Well-Known Member

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    Which device is connected to the -7dB port?

    You may consider swapping them around.

    You could probably get the Comcast guy to 'spot' you some splitters. The Comcast splitters are good quality and function.

    Still, just wait for him and see what you can get him to do.

    Intermittent MoCA can easily be bad connections at the connectors behind wallplates or, really, any crimp on the line.

    Also, it looks like you have quite a bit of excess cable in the attic. Maybe not so much it would really make a difference. But, your MoCA levels would be better if they were all closer to 0dB.

    You can log in to your Comcast Router at: http://10.0.0.1 and check it's levels, too.

    admin
    password

    -KP
     
  3. snerd

    snerd Well-Known Member

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    I'd suggest replacing the 3-way splitter with one that handles frequencies up to 1675MHz, and place the PoE filter directly on the input of the 3-way splitter. You could just buy your own PoE and leave the other one out on the pole, but you should see much better MoCA signals after putting a PoE directly on the 3-way splitter.
     
  4. snerd

    snerd Well-Known Member

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    That has no marking that indicate frequency range, so I'd avoid it.
    This Holland 3-way is a better choice. Monoprice has good prices on splitters, I have this 3-way splitter in my system.
     
  5. timchi29

    timchi29 Member

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    The 2-7db's go to the 2 mini's. If I try replacing the 3 way, would I swap out the 2 way also?
     
  6. snerd

    snerd Well-Known Member

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    If you put the PoE on the input to the 3-way, then no MoCA signals will reach the 2-way, so it won't need to be upgraded.
     
  7. kpeters59

    kpeters59 Well-Known Member

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    Pretty sure the TiVo's are getting to the internet through the MoCA capable Comcast Gateway, so blocking MoCA to the Router would be bad...

    I think that 3-way is labeled backwards to most other 3-ways.

    [​IMG]

    Usually they're marked as 2 -3.5db's and a single -7dB.

    So, I think the one in this pic marked as 'out 3.5dB' is actually the -7dB port. They just 'worded' it inversely...

    Swap them around then recheck your MoCA levels. Make sure your connections are snugged up pretty tight. Comcast installers are required to use a wrench to tighten connections at the splitters.

    -KP
     
    Last edited: Apr 10, 2020
  8. dswallow

    dswallow Save the Moderatоr TCF Club

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    The attenuation would be twice that on 2 of the ports as it is on the 3rd port of an unbalanced 3-way splitter. Splitting a signal attenuated by 3.5db already will result in a total attenuation of approximately 7db on its two outputs. They're just choosing to label it as an attenuation measure (positive) instead of as a signal loss measure (negative)
     
  9. timchi29

    timchi29 Member

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    Comcast was here and this is what they dropped off to me. You would think these thing were the last ones on earth. The 3 way has the 2-7db ports. I give it a shot and make sure everything is tight. And these connections are in my basement. Think it's a good idea to use the coax and goes up to the attic and back down to the bedroom mini on the 3.5db port, and the Roamio and other mini on first floor on the 7db ports?
     

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  10. dswallow

    dswallow Save the Moderatоr TCF Club

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    It really shouldn't make any difference, as it's pretty unlikely even with that run you're going to have 300 feet of cable. :)

    Is your cable modem where the MoCA network is getting created or is it happening with the Roamio (and you have an Ethernet connection between the Roamio and the cable modem)? If you're creating it with the Roamio, there might be an argument to keep it on the 3.5db output. But really, it just shouldn't make any difference to your situation; your wiring is just not that extensive or complex.
     
  11. kpeters59

    kpeters59 Well-Known Member

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    [​IMG]

    Comcast REALLY doesn't like to use the 3-port splitters specifically because of the unbalanced output.

    -KP
     
  12. dswallow

    dswallow Save the Moderatоr TCF Club

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    The could easily just use balanced 3-ways, if that was really a concern. :)
     
  13. kpeters59

    kpeters59 Well-Known Member

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    I think the balanced ones are 5 dB down?

    -KP
     
  14. Rxpert

    Rxpert New Member

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    At the end of the day, it boils down to trial and error. Intuitively speaking, for best connectivity, I would recommend trying a different cable configuration. Perhaps eliminate the three terminal connector, using that feed to connect to the TiVo. Then use a two way splitter from the TiVo output to the minis. It may or may not work, but worth a try if nothing else helps. One of my family members has been successfully using a “powerline ethernet connector” setup to run the minis. Good luck.


    Sent from my iPhone using Tapatalk
     
  15. dswallow

    dswallow Save the Moderatоr TCF Club

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  16. snerd

    snerd Well-Known Member

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    Close! Typically -5.5dB
     
  17. dswallow

    dswallow Save the Moderatоr TCF Club

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    So it's been over four hours now... anything to report after switching out the splitters and adding the POE filter?
     
  18. krkaufman

    krkaufman TDL shepherd

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    Yes. (But may not be lone hurdle.)

    Has the OP stated that the Roamio DVR is acting as the Ethernet/MoCA bridge? Or is the modem/router?

    ^this^

    That’s a whole lotta posts and the most critical aspect of the setup remains unknown, right?

    For that matter, what specific Roamio model does the OP have? And how is it networked? Ethernet? MoCA? Wireless?
     
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  19. krkaufman

    krkaufman TDL shepherd

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    You’d want to prioritize getting the strongest possible cable signals to your modem and DVR. MoCA has built-in amplification that *should* suffice for your setup, assuming a MoCA-compatible coax plant.

    TX & RX power levels look fine (given a range of -30 to +3, good to not great), so I’d suspect either MoCA interference from a neighboring setup (how many MoCA nodes are reported in the MoCA stats?), which a “PoE” MoCA filter would remedy, or maybe a wireless connection for the Roamio DVR.
     
  20. timchi29

    timchi29 Member

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    Replaced the splitters and added POE Filter, and still sporadic lost connections to the mini's. I'm going to check the attic today to see if there is a splitter there. I assume there is since the coax in the bedroom heads up the wall. One thing that I forgot to mention is when I put the one mini downstairs on ethernet a couple weeks ago, it lost connection also. Could the Roamio be the issue?
     

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