Coax/Splitter issues?

Donut417 · January 9, 2016

I have noticed the last few days our signals may not be good. First let me give you some back ground. Our line from the pole goes in to a box on the side of our house, that’s where the grounding block is. Another cable goes from the grounding block to the 2-way splitter. One side of that splitter feeds our modem. The other side goes in to a 4-way splitter. 2 cables come off that splitter and feed the tvs on our first floor. A 3^rd RG59 cable comes off that 4 way and goes from our basement all the way up to the attic on our second floor and feed a 3-way splitter to feed the 3 tvs there.

I know, its not a perfect setup, but 20 years ago my dad didn’t have foresight to install 3 cables up on the second floor. We added the other TV’s at a later date. For over a year I have had troubles on my TV on the second floor where certain channels above 100 will cut out. Some days they work, other days they don’t. Ive noticed over the past week our modem signal is not where id like it. Ill be including my logs. Downstream seems to run 12-14 dB and the upstream is always at least 50dB. That’s just in spec.

First of all I want to replace my splitters as I heard cheap splitters can cause issues. The 4 way needs to be a 3 way. I was going to by a unbancled 3 way and put the 3.5db port for the 2^nd floor cable. Ive have been researching Moca and Im thinking it might be faster, more reliable then my wireless connection. I can say the line from the drop on the pole and the grounding block was replaced maybe 2 years ago. Im thinking the line from the grounding block to our 2-way splitter might be needing to be replaced.

Who makes good splitters?

Do you think replacing the RG59 cable going to the second floor (if feasible) with RG6 would help us out?

One thing I haven’t seen, is Moca Full or half duplex?

I haven’t considered power line, due to the fact we have old line and new lines as far as electrical. Plus, I heard that running from one circuit to another decreases performance.

cmSignal.htm.pdf

cmLogs.htm.pdf

Donut417 · January 9, 2016

Ive added my setup in a diagram. I might have not been clear about how every thing is setup.

Wombo · January 9, 2016

Probably just too many splitters, you may need to have the tech out from your local cable company to check the levels at the ends of the splitters. They can put some gain into the line and then just pad any of the early taps that are too high.