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Ins & Outs of splitters #160402
11/30/05 08:02 AM
11/30/05 08:02 AM
Redsy  Offline OP
Joined: Mar 2001
Posts: 2,056
Bucks County PA
On a standard CATV splitter, does the input and output connections raelly matter, or is the splitter simply a splicing device?



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Re: Ins & Outs of splitters #160403
11/30/05 08:22 AM
11/30/05 08:22 AM
NJwirenut  Offline
Joined: Sep 2001
Posts: 806
Bergen County, NJ
Yes, it does matter.

If you open one up, you will see that it is a transformer with one primary winding and 2 secondaries, not a simple splice box.

Re: Ins & Outs of splitters #160404
11/30/05 10:52 PM
11/30/05 10:52 PM
hbiss  Offline
Joined: Dec 2003
Posts: 886
Hawthorne, NY USA
If it were really a transformer with one primary and two secondaries the "in" and "outs" wouldn't matter and it would indeed be a "T" or splice. Ain't no such thing.

Anyway, answer your own question. Take a 2 way splitter and connect a cable drop to an "out" and a TV to the other "out". What do you get? Now connect the TV to the "in".

So, it passes a signal from the "in" to the "outs" and vice versa but not between the "outs".

This will hold true for any splitter configuration and if you want it to work observe the in port.


Re: Ins & Outs of splitters #160405
12/18/05 08:27 AM
12/18/05 08:27 AM
Trumpy  Offline

Joined: Jul 2002
Posts: 8,236
SI,New Zealand
All that "transformer" does is maintains the line impedance at 75 ohms and matches the input to the output.
A standard splitter will have this in it.
The better quality ones we have here in NZ have MOV's.
Don't forget also that there is often a power-pass feature for line-powering devices, this means that a diode is often included for reverse polarity protection.


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