[mythtv-users] How to limit 2xDVB-S (+DiSEqC) to 1 LNB at a time?

[Mike Perkins]

Simon Hobson wrote:
> David Lister wrote:
> 
>> Is there a way which would allow e.g. 2-4 sats for 2 tuners with one
>> cable? :) I'm still new to this...
> 
> No.
> 
> The reason is that unlike terrestrial where you just feed a load of 
> signal down a cable and the tuner picks out what it wants, with sat, the 
> LNB does some of the conversion. In a basic single sat system, signals 
> sent up the cable will typically select high or low band, and horizontal 
> or vertical polarisation - thus selecting one of four sets of signals. 
> Since only one of the four sets of signals can be sent down the cable at 
> once, that puts limitations on what signals can be tuned if you split 
> the signal and run multiple tuners off it - ie the separate tuners can 
> only access signals that are in the same band and on the same polarisation.
> 
Interesting. Perhaps there's a case for a feature similar to multi-rec here? 
Where the tuner(s) can select channels from the subset which the LNB has chosen?

-- 

Mike Perkins