Question about Freesat signals
 

Paul Ratcliffe wrote:
On Sat, 22 Aug 2009 16:06:18 +0100, Tony wrote:

You can't generally mix satellite and terrestrial raw signals on the
same cable

Of course you can.

likely they would interfere.

They use completely separate frequency bands. It is not "likely". It is
completely unlikely.


Well I must admit I have no real experience of doing this, I had just
assumed one should avoid it, and you can't have the 2 polarisations on
the same cable anyway because they would be too close.

The alternative to multiple
cables is one sat receiver with an RF modulator and use a carefully
chosen frequency and put that on your terrestrial network. You then use
some sort of remote repeater to control the satellite box. The Sat
signal then appears as one analogue TV channel.

For God's sake, this is a completely mad solution.

Why?, its done by many for sky/cable etc its a scalable solution and
known to work for almost as many TVs as you want. There are a few
disadvantages like loss of stereo and HD but thats fine for many that
just want to use their satellite in different parts of the house rather
than have multiple users on different channels. It not the way I would
want it, but it was just a suggestion. I think you have over reacted.

--
Tony

Question about Freesat signals
 

"Brian Gaff" wrote in message
om...
Surely every time you attempt to share the focal point with more and more
lnbs, the performance of the system goes down. They cannot all be in the
best position, surely?
Brian


If you look in a typical [quad] LNB you will see the bases of four Gunn or
Impat diodes sticking out into the wave-guide from all four sides.

I guess there will be some reduction in an Octo.

Question about Freesat signals
 

On Mon, 24 Aug 2009 12:09:51 +0100, Tony wrote:

you can't have the 2 polarisations on the same cable anyway because
they would be too close.

What would be too close to what?
The frequency bands are the same, so adding together H and V would mean
you get in all probability nothing usable out the other end.

Question about Freesat signals
 

"Paul Ratcliffe" wrote in message
...
On Mon, 24 Aug 2009 12:09:51 +0100, Tony wrote:

you can't have the 2 polarisations on the same cable anyway because
they would be too close.

What would be too close to what?
The frequency bands are the same, so adding together H and V would mean
you get in all probability nothing usable out the other end.

No you don't. It's an interesting experiment. Only the few muxes without
anything on the opposite polarisation and overlapping work.

Bill