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Re: Cable TV (cable line splitters)


To check the isolation of a splitter- terminate the input, inject signal to one output port, take reading from other output port. Your reading will be close to 18 db less at CH 3, when compared to input signal to input, and both output legs 75 ohm loads. Another option is to check the manufacturers specs. Yes the splitter. It boggles the mind to be in a headend,and someone says here is the combiner. I will look. A silly-assed splitter.

> It seems that you have a defective TV set (“B”) and a poor quality splitter (the first one – that splits to “A” TV set and the second splitter). The second splitter is fine. You have two ways to solve the problem:
> - Try to change the first splitter with a better one (a good splitter has at least 25dB separation between outputs)
> - If no success and if you have enough level you might separate the TV set “B” with a tap (at least –11dB loss). For this the diagram will look like: main line – tap (from the leg you go to TV set “B”) – splitter – TV sets “A” and “C”
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> > Problem is being caused by lack of isolation back thru the splitter and oscillation from the TV sets, try using a better splitter and maybe a matching transformer on the back of the sets. One good 3 way splitter will give you better >
> > > ..Feeding three TVs off main cable (diagram)
> > > Set 'A' has problems with some channels,but SOMETIMES if we put set 'B' on the same channel then set 'A' will recieve channel fine. This perplexes me because set 'C' has no probs with any channel ever.
> > > anybody have a thought on how to eliminate set 'A' channel problem ??(usa) (usa)
This is CABL.com posting #78255. Tiny Link: cabl.co/muwl
Posted in reply to: Re: Cable TV (cable line splitters) by marian
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