Satellite Splitter

[Proppinupthebar]

No, it selects polarisation.
Glossary of Television Terms
The polarity remains unchanged. Centre wire is positive.

Symantically and pedantically correct again

Even more pedantically, only the voltage is used to select polarisation, there are only two polarisations used for Sky dishes, horizontal and vertical. The 22kHz tone selects high band (uses the 10.6GHz local oscillator in the LNB), no tone means low band (9.75GHz local oscillator used in the LNB).

[Smithy99]

Ok guys, give it a rest now

I agree but I was trying to give a basic description to someone who didn't know what an LNB was (well thats my story anyway)

Should have known some smart aces would come along and trip me up.

[arnaud]

Hi,
I've got Sky installed in my home and use the communal Satelite wall socket. Problem is that there is only 1 Satellite socket whereas the Sky Box receiver requires two signals. I have checked and there is only 1 cable conmnected to the wall socket.
Does anybody have an idea of how I could perform my installation?
NB: I have access to the LNB communal room but I won't be able to add a new cable going to my flat...

Thank you

The LNB (which is the box on the end of the arm on the dish that deals with the signal) has two polarities, Horizontal and Vertical, the Sky receiver sends a voltage up to the LNB to select which one it needs as different channels or on different polarities.

So connecting two receivers to one LNB by splitting the signal will not work as they may need to send different voltages to the LNB if they are on different channels (which they will be otherwise you wouldn't need two).

The standard way to achieve two receivers is to use a quad LNB, as the name describes, it has four seperate outputs, two for each Sky+ or SkyHD receiver, it is basically four LNB's in one.

The other issue is that when the two receivers are next two each other, as they both use the same remote, you would swap channel on one and the other would also do it as they would both see the infared (IR) signal from the remote control.

You could use the buttone on the top of the receivers but this will soon annoy you.

The easiest way would be to put the receivers in the rooms where the TV's are and just run two cables from the dish to each, job done.

[Sam Radford]

Does anybody have an idea of how I could perform my installation?

Put a dish against a south-facing window?
Otherwise, move.