Good morning y’all! Working on setting up a MoCA setup in our new house and running into some issues during setup. Using these MoCa gocoax 2.5 adapters but seem to a having a splitter problem. I know MoCA adapters need to communicate on a frequency up to 1675 MHz so I bought these Splitters, one 4-way and one 2-way, thinking they would work. Once installed, the MoCA adapters are communicating but I’m getting intermittent connectivity and extremely slow internet. I had a spectrum tech out and he seemed to think that the issue was in the splitters because the signal all but died after hitting the 4-way.
Wondering if y’all think I should order these splitters to see if they work, or if y’all see any other issues from my diagram. For reference, I’m using a Spectrum Modem E31T2V1 but my own Netgear Nighthawk router.
Any help would be appreciated!
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I’ve heard that some satellite TV splitters are not good for MoCA due to high port-to-port isolation. That Amphenol is supposed to be a good splitter. But if you aren’t using all 4 outputs, maybe get a 2-way for lower loss.
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Name: Amphenol 4-Way Digital Coaxial Splitter MoCA 2.5 ABS314H
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I suspect that the issue is that the MoCA signal is interfering with the DOCSIS 3.1 signal. Get a PoE Filter and connect it at the Modem’s coax connection to keep the MoCA out.
Here are some diagrams from GoCoax that provide guidance. The second house diagram most likely applies to your situation.
I doubt that the splitters you are using are causing the problem. While not ideal, I have used them with MoCA for quite a while and have not had any issues.
so I bought these Splitters, one 4-way and one 2-way, thinking they would work.
Yeah, “satellite” splitters aren’t a good choice for a MoCA setup. Try grabbing similar splitters from the MoCA-optimized Antronix MMC1000-B series. (Amazon link)
Related:
- MoCA-compatible splitter recommendations (… and warnings)
- preferred MoCA filter: PPC GLP-1G70CWWS (Amazon US listing) … 70 dB stop-band attenuation, spec’d for full MoCA Ext. Band D range, 1125-1675 MHz
What are the signal levels at your cable modem? In your diagram the only device that is using the signal on the cable from outside your house is the cable modem, yet it looks like you’ve got the cable modem 2 spitters and at least a 10.5 dB loss away from the incoming drop.
I think I’d reorganize the splitters to maximize the signal to the modem. Put the 2-way splitter on the cable from outside, run a cable from one side of the 2-way splitter directly to the modem, patch the other side of the 2-way to the input of the 4-way splitter and attach all the MoCA devices to the 4-way splitter. That should give you an instant 7 dB improvement in the signal delivered to the modem. For bonus points add a MoCA filter between the 2-way and 4-way to keep the MoCA signalling out of the modem, replace the 4-way splitter with a 3-way to eliminate the open port and make sure the new 3-way splitter is one specifically designed for MoCA.
Why waste your time! Just use ethernet!!
Initial 2 way splitter (ISP in, 1 output to Modem, other output to 3/4 way splitter that feeds the 3 rooms. If you aren’t using the fourth room replace it with a three way. It’s Docsis interfering with Moca.