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Discussion in 'TiVo Roamio DVRs' started by m021478, Jun 12, 2014.
Don't give up on me! We're probably right at the finish line!
Okay, I think I know what my confusion was (for the most part)...
Forget about the first picture I posted previously showing my cable modem. When this thread advised "It is recommended that you install a Point of Entry (POE) filter at your cable TV's point of entry in the home," I thought that meant the coax cable going into the cable modem, but I now believe what it meant was the coax cable labeled "In from street" in the revised diagram below:
Does that make more sense? (confused)
Take the PoE filter off the cable modem, and put it on the "in" port of that very first splitter where the cable comes into the house (must be no splitters before this point).
Your cable modem will probably work just fine. If it starts having problems, pick up another PoE filter for it.
Your tuning adapter should be OK, as long as it isn't Cisco (Scientific Atlanta) brand, which it appears it is not. If it gives you problems, consider installing a PoE filter on it like you had on the modem.
Make sure the splitters are rated 5-1000MHz (5MHz-1GHz). If rated higher, that's good, too.
Am I done yet?
or did you mean like this:
In your last picture, I think you should remove POE #2. It's redundant because it's at the other end of the cable from POE #1.
You still need to place two other filters.
In the attic where the coax cable runs into your cable modem, you should put a filter.
Finally, you need to find out where the cable enters your house. That shouldn't be too difficult. Just go outside and follow the cable line from the pole to your house. That's where it enters. Often there's a splitter visible and you could put a filter there, though I'm not sure how weather resistant they are. If there's not a splitter there, then on the other side of the outside wall you're likely to find a splitter that you can put the filter on.
Ultimately you want a clear run of coax from the Roamio to each of the Minis without a filter in between.
Awesome! Thanks to all for your help!
Having one on the cable modem isn't always necessary. But, it shouldn't hurt anything, either. If one is built into the modem, adding an external one just creates a redundancy, like having one at each end of a cable is one more than there needs to be on that run (like you spotted, in the last picture).
I'm not convinced that there are no splitters "upstream" of what is labeled "from street". Note the lack of a code-required grounding wire to that splitter, if that's truly the "from street" point-of-entry. But, I just want this to be wrapped-up, and will assume the real PoE is just a pass-through grounding block (best case scenario here).
So, it looks like this is finally "case-closed" (unless the whole picture isn't presented, or pictures of the true "point of entry" are missing, that might show upstream splitters, making [almost] this whole process a joke)...
<closing the case, anyway>
...and there was much rejoicing <yay>
I'm with you. There has to be other splitters in the system. He talks about a cable modem in the attic, and three Minis that are (or will be) elsewhere in the house. For those devices to get a signal there must be other splitters since the one shown in the picture is only a 2-way and one output goes to the Tivo and the other output goes to the TA.
So since he's not sure where the other splitters are, it would seem simplest to put the filters at the points he can find (TA, Cable modem, and where the cable enters the house).