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Bandwidth question
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paw



Joined: 08 Mar 2006
Posts: 1176
Location: Arvada, CO

Posted: Mon Dec 29, 2008 9:57 pm    Post subject:
beun wrote:
Another much more pessimistic way to look at this:

The EBU defines the following standard: EBU System S4 1920x1080/p/50 (this is equal to SMPTE 274 System 3 for 1920x1080/p/60) with a sample rate of 148.5MHz.

Acoording to the Nyquist theory with an ideal (read unobtainable) low pass filter, this system will have information up to 148.5/2MHz=74.25Mhz.

So for components in the chain it makes sense to double this bandwidth to around 150MHz each. This makes it possible to put several component in the display chain without degrading the source bandwidth. Anything more is overkill.



Kim

Are you talking about IC, transitors, resistors, etc. or components like switchers, convertors, etc.?
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beun



Joined: 28 Jun 2006
Posts: 676
Posted: Tue Dec 30, 2008 12:38 am    Post subject:
I would be talking about whole systems (read boxes) in the chain. At a 150MHz bandwidth you could put around 4 of those systems in cascade before you start to notice anything.


Kim
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AnalogRocks
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Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada

TV/Projector: Sony 1252Q, AMPRO 4000G
Posted: Tue Dec 30, 2008 8:44 pm    Post subject:
Great infomation you video geeks! ( I mean that in a complimentary way of cource as I am one )

Keep up the good work!
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precisedix



Joined: 25 Mar 2009
Posts: 1
Posted: Wed Mar 25, 2009 12:10 pm    Post subject:
Nashou66 wrote:
AnalogRocks wrote:
Hey now Nash. No reverse engineering.

Driving trians backwards can be hazardous.


But sometimes you need to couple more cars to the train and sometimes going backwards is the only way how Wink

Only going by what he has said, if you read enough posts most of the info is there scattered all over.

Athanasios


Yeah your right man... i agree with you.... there are such scattered information all over those....




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