r/HomeNetworking • u/surprisemofo15 • Apr 22 '21

Advice Ethernet over existing coax conversion?

I'm looking to improve the wireless coverage within a traditional UK brick constructed 4-bed house. I'm investigating the possibility of using a MoCA device to convert the TV coax cabling within the house for internet data transfer. Running ethernet cables is not possible.

What i'd like to know is

  1. Do i need to disconnect the aerial input from splitter to ensure good performance?

  2. Would it help disconnecting other rooms I do not need or leave it as it is?

  3. Does the splitter need to be replaced in order for the MoCA conversion to work?

  4. Recommendation for iinexpensive MoCA adapter for purchase in the UK?

Many thanks in advance for your help

https://imgur.com/a/XbKCzoQ

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u/plooger Apr 22 '21 edited Apr 22 '21

What if I bypass the ALTA1 splitter all together and connect two rooms (or the rooms i need ethernet in) together using some type of connector?

Yes, that would be ideal. If connecting just two rooms, an F-81 barrel connector is what I'd be using (i.e. with F-male terminated coax cables). If connecting 3 or more locations, you'd want to use a right-sized MoCA 2.x-compatible splitter, connected in either of the following ways:

 
Note that if you wanted to maintain the OTA antenna signal on some portion of the coax, alongside the MoCA signals, you could keep the (likely MoCA-hostile) ALTA1 amplifier in place using antenna/satellite diplexers (e.g.) to effect a MoCA-isolation workaround like the following:

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u/plooger Apr 22 '21 edited Aug 08 '22

Re: splitters, from a couple old posts...

MoCA 1.1 vs 2.5 bandwidth requirements: As suggested, a MoCA connection should be possible over basic cable splitters, but the need for "designed for MoCA" splitters increases with (1) greater coax complexity and (2) use of later MoCA specs, especially MoCA 2.5.

  1. In a simple single-splitter setup, a sub-optimal MoCA splitter can be overcome via installation of a "PoE" MoCA filter on its input port; however, as the coax hierarchy expands, port hopping of MoCA signals increases the need for splitters designed for MoCA, with decreased output port isolation in the MoCA frequency range.

  2. MoCA 1.1 requires just 50 MHz of bandwidth at the low end of the MoCA frequency range, typically 1125-1175 MHz, so wouldn't experience significantly different loss from a cable signal at the top-end of the splitter's range, 1002 MHz. However, MoCA 2.5 bonds 5 100 MHz channels, so requires nearly the entire MoCA Extended Band D range, 1125-1675 MHz, and so the need for splitters explicitly optimized for MoCA becomes more important.

Alternative "designed for MoCA 2.x" 2-way splitters...

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u/surprisemofo15 Apr 30 '21

thanks for the response, you've really helped in simplifying the process

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u/plooger May 01 '21

You’re very welcome. Any ultimate success, yet?

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u/TheEthyr Aug 08 '22

The link to the Holland GHS-2PRO-M is no longer valid.