LNB and Diseqc switchs low level information needed

[thelinuxer]

Hey guys,

I was asked to make a presentation about satellite TV and how it works. I now have all the high level information I need for the presentation, but I need some low level information about the electronics of LNBs and Diseqc switchs (I thought that this is easy, but I had no luck finding those).

Can anyone guide me where to find block diagrams and/or schematics of these devices ?

Thanx in advace

 

[ng54]

satcure.co.uk under the technical tab. good info

 

[thelinuxer]

satcure.co.uk under the technical tab. good info

Thanx alot for relying

I already checked that website. It doesn't have the information I need.

 

[jerryt]

Hey guys,

I was asked to make a presentation about satellite TV and how it works. I now have all the high level information I need for the presentation, but I need some low level information about the electronics of LNBs and Diseqc switchs (I thought that this is easy, but I had no luck finding those).

Can anyone guide me where to find block diagrams and/or schematics of these devices ?

Thanx in advace

h ttp://www.sadoun.com/Sat/Products/Dishnetwork/LNBF/dpptwin.pdf
h ttp://www.satsig.net/lnb/explanation-description-lnb.htm
h ttp://www.scatmag.com/technical/techarticle-mar05.pdf
h ttp://www.isat.info/eng/share/index.php?db=share&category=LNB/Feed-Horn&mode=view&sp=0&id=151
h ttp://www.isat.info/eng/share/index.php?db=share&category=LNB/Feed-Horn&mode=view&sp=0&id=113
h ttp://www.st.com/stonline/products/literature/ds/10979.pdf

Must sign in Mytheatre forum;
h ttp://board.mytheatre.ru/dload.php?action=file&file_id=187

 

[Anole]

additional info

diseqc switch/command information:
h ttp://www.tech-faq.com/diseqc.shtml

 

[ng54]

thelinuxer I know what your looking for, it does exist I've seen it about 4 years ago on the web. Its the technical white paper that shows the programming, signal levels and frequencies. Try st.com and search on diseqc, they have alot of that type of info as they are the manufacturer of the diseqc microcontrollers for the motors and switches. Best of luck to ya.

 

[thelinuxer]

Thanx to all of you guys. I checked out the links, but I can't find something that explains how the diseqc works. Can anyone explain it to me ? I want the low level -geeky - engineering talk

thanx again

 

[Hermitman]

Here's a document detailing the DiSEqC bus functional specification. It covers framing, bit timing, programming, etc. Pretty geeky.

http://www.eutelsat.com/satellites/pdf/Diseqc/Reference docs/bus_spec.pdf

If that's not enough, try this website. Since Eutelsat developed DiSEqC, maybe a reference here might be what you're looking for. Good luck.

Eutelsat : DiSEqC specifications for satellite receiver and peripheral equipment communications