How to connect a TV to an aerial point?

Blue1

OK I have checked the roofspace and there is a grey box with the word "Triax" on it which has 5 cables attached to it, 4 black and 1 white. 3 of the black cables and the 1 white go into sockets marked "Out" and one of the black cables goes into a socket marked "TV In".

I think all of the black cables in the house are for the Sky installation so I removed the black cable from the TV In socket and connected the white cable instead but with no luck although the TV in the lounge didn't work!! So at a bit of a loss what to try next other than switch around all the cables that are connected to the Triax box.

mcfisco

There must be other info on the triax box?

It's possibly a RF amp, amplifying and splitting the aerial feed to 4 outlets
This could have also been combined with the RF out from a Sky box before it was sent to the amp.
Does it have a power supply?

almillar

As above, looks like you've found a splitter/amplifier. Is it powered, and is it working? Hopefully the 'TV IN' wire is connected to the aerial - can you follow it in the roofspace and see it going out onto the roof? As mcfisco points out, it could be that the aerial isn't connected, and if you find that the TV IN cable seems to be going downstairs, it could be connected to the RF OUT of your Sky box, for distributing this Sky round the other TVs in your house.

StuC75

For the loft splitter.

TV In - Needs to be going to the aerial..

The TV Out - Runs to each of the room..

If there is a Black & White cable in the living room, and previous occupants has Sky then one cable would have run the RF Input of the Sky Box, and another linking to the rf output.

This would allow the sky output channel to be pipped back up to the splitter and the same channels then piped back down to the other rooms (I had it set up this way at my old house).. This allows the other sets to receive a good? (in my case) aerial signal for terrestrial reception and whatever was being watched on sky (over rf not as much interfered - but obviously on SD (Not HD)..

almillar

Not just SD StuC75 - analogue SD!

googler

Blue1 wrote: »

OK I have checked the roofspace and there is a grey box with the word "Triax" on it which has 5 cables attached to it, 4 black and 1 white. 3 of the black cables and the 1 white go into sockets marked "Out"

Since your OP suggests that there's a white cable behind the wall socket you're trying to use, you need to verify if the white cable in the roofspace is the same one.

Disconnect the white cable from the splitter in the roofspace, and connect a 9v battery across one end of it - doesn't matter which - then go to the other end, and connect a voltage meter. A positive reading approaching 9v confirms it's the same white cable (or you could short out one end and confirm zero resistance at the other end).

If it is the same cable, you need to find a way to connect this cable directly, or via a splitter/amplifier to the aerial that you have.

There's little value in guessing which cable goes where; use this method to determine which is which and where they go.