rmichalik wrote:That was the pedestrian explanation. The MOCA signal is probably some sort of modulated RF signal in the 1000 to 1400 MHz range. By sending a signal down a long cable, and then back again, that round trip signal is interfered with by the leakage across the splitter signal. Depending on the phase of the leakage and round trip return, it can constructively or destructively interfere. Technically it is a dispersive fade, and is a big problem with broadband signals, which any streaming video signal would be.
And i did leave the grounded entry point moca filter right where it was. But i needed a 2nd moca filter closer to where all the action was before it would work and stop freezing my DVR box. That is the technical problem for comcast, they have a bazillion legacy installations out there, but are adding these new technically intense boxes. Some of those legacy wiring installations simply willl not be up to the new tasks.
MoCA is much like the IBM token-ring topology but is actually ethernet over coax cable. The advantage of MoCA over ethernet though is that one of the devices operate as a 'controller' hub and all devices share teh connection without any collission events (where more than one device is broadcasting at a time on the same frequency band). POE's primary purpose is to stop outbound MoCA from leaving your home 'plant' and getting out to the neighborhood. It would be interesting to have a comcast 'lab' test the effect of a POE added to the amp input on MoCA nework effective signal strength.