[mythtvnz] Bitrate changes on DVB-S?

[Steven Ellis]

David Zanetti wrote:
> On Mon, 2007-01-01 at 02:21 +1300, Steven Ellis wrote:
> [bitrate comparisons]
>   
>> Think there is s slight difference between the B1 (TVNZ) transponders
>> and the D1 (SkyTV) transponders
>>     
>
> The symbol rate is the same on both B1 and D1 sourced transponders,
> 22.5Msym/s. (Aside: since this is QPSK modulation as it's DVB-S, it's
> two bits per symbol giving us 45Mbit/s per transponder.)
>
> So there's no reason other than deciding to tune things to tweak the
> bitrate down. If anything, with the stronger footprint from horizontal
> beams landing off D1, they should be able to up the symbol rate a bit.
>
>   
Just did some recording tests of the same program off a D1 beam and a B1
beam and the bitrates are the same.

So what are you looking at that has a horizontal beam?

Steve

-- 
Steven Ellis - Technical Director
OpenMedia Limited
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