Author Topic: TV/satellite tuner principle/design  (Read 2418 times)

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Offline JaneTopic starter

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TV/satellite tuner principle/design
« on: December 21, 2013, 08:15:42 pm »
Is there anywhere a project where I can learn how TV/satellite  tuner works?
Thank you
 

Offline Rerouter

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Re: TV/satellite tuner principle/design
« Reply #1 on: December 21, 2013, 08:20:08 pm »
if your in Australia you just missed the mark by about a week, as our analog feed was just killed for TV,

as for a project to learn, track down what modulation a few of the free analog channel satellites are using and play with receivers and transmitters before tracking down where in the sky one is to try and grab off the real thing,
 

Offline JaneTopic starter

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Re: TV/satellite tuner principle/design
« Reply #2 on: December 21, 2013, 08:29:12 pm »
NO, I am from Australia.
Can you please explain a little more what you mean by:
"and play with receivers and transmitters before tracking down where in the sky one is to try and grab off the real thing"?

 

Offline Rerouter

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Re: TV/satellite tuner principle/design
« Reply #3 on: December 21, 2013, 09:16:40 pm »
To try and help you i had a quick try to work out the modulation used for satellite broadcast, but could not find anything quickly, still i would think its some type of frequency modulation,

if this is the case then first you build something to transmit and receive in the audio spectrum using whatever carrier frequency you like to learn the basics, (there are 10's of thousands of guides on building FM transmitters and receivers), then once you get the basics down you can move up to trying to De-modulate a live satellite broadcast to your TV, or even just broadcast the feed of one video device to another in your house wirelessly,
 

Offline Psi

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Re: TV/satellite tuner principle/design
« Reply #4 on: December 22, 2013, 03:31:10 am »
DVB-S is single carrier quadrature phase-shift keying with multiple streams
DVB-T is orthogonal frequency-division multiplexing
So a little bit more involved that FM radio :P

It's awesome at being able to deal with multipath interference though, which is why i cant wait for DVB-T transmitters small and cheap enough to use for HD FPV on RC planes.

Oculus rift + 4K camera + DVB-T transmitter = pure FPV porn
« Last Edit: December 22, 2013, 03:34:04 am by Psi »
Greek letter 'Psi' (not Pounds per Square Inch)
 


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