[mythtv-users] Dual DVB-S Receiver Capable of using CI / CAM module

Nick Rout nick at rout.co.nz
Mon Aug 28 02:04:32 UTC 2006

On Sun, 27 Aug 2006 23:10:06 +0100 (BST)
Steve Hill wrote:

> > OK, so I would definitly need a dual LNB dish (I thought it worked the same
> > way as aerials, don't know why, just did....)
> An LNB is an active component - it draws power from the tuner and the 
> tuner tells it to select a particular polarisation (vertical/horizontal) 
> and frequency band (high/low).  I have seen splitters that block the 
> selector tones and power from one of the tuners but that means one of the 
> tuners can't select polarisation and band and relies on the other to do 
> it.

I am pretty sure (without looking at it) that my splitter blocks
something from one of the tuners, now I understand why!

All of the stuff you can get in NZ from Optus B1 seems to be vertically
polarised, so thats not a problem.

Nick Rout <nick at rout.co.nz>

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