I would suggest taking the modem off the amp completely. By such I mean go demarc > MoCA filter > 2 way 5-1000Mhz splitter > one end goes to modem and one end goes to amp > 8 way MoCA splitter(don't know which one) > TV and MoCA adapters.
As for which splitter, that is beyond my knowledge since I don't have any experience with MoCA. All I know is amps mess with the upstream OFDM channel on D3.1 modems. You might want to try DSLReports if you want advice on what splitter to use or if you MUST use a amp.
Wow, you are a busy person. Thank You so much for all your assistance and advice. You are a huge asset to these Forums.
Thank you! I need to keep busy to stay sane. I am just sorry I am so loud that it stops other people from posting. Also, I am not very helpful on this particular topic. All the different MoCA versions and bands and their frequency use confound me. I found this which has some good info on page 9 which seems to point to 1675Mhz as the top end of MoCA 2.5. Since MoCA is backwards compatible it's best to build for 2.5.
As for what amp to use, I wouldn't even know where to begin. I see that OP's modem has a downstream operating range of 108 to 1002 MHz and duplex filters of 5-42 and 5-85 MHz for the upstream. So it would seem a standard 5-1000Mhz amp would do, but we have seen where it causes problems. I think an expert opinion is required.
FYI, Another MB8600. You know my rant, but, by now, it should be more and more apparent that I am accurate about the "Motorola"/Zoom brand it's it's negative aspects.
