How the Receivers select sats & Transponders

[catman915]

Can anyone refer me to a source of info on how the Directv receivers activate/select sats in the lnb? Thanks

 

[charper1]

Super basic:varied frequencies and voltages.

You can start here for some basic info: http://electronics.howstuffworks.com/dtv.htm

Or do a google search.

May I ask what you are trying to do?

 

[Smith P.]

better read Rod's compilation at www.coolstf.com

 

[charper1]

Thanks Smith

 

[catman915]

Thanks for the reply. Sure, I'm going to fine tune my at9 setup. I'm not satisfied with the alignment job done by DTV representatives in my area. I purchased a DigisatIII Pro and being a retired electrical Engineer with experience in maintaining a "C Band" system for 12 years I think I can do a better job. I just don't know the particulars of the system. I understand that it uses voltage to set polarization and that a 22khz tone is used to switch between two satellites for alignment but that is about all. There are a couple of questions I have to ensure that I don't make a mess of things. It's always advisable to understand how a system/component works before attempting to troubleshoot/align it. Most of what I've found only addresses generic descriptions of the overall system of satellite Tv Delivery. Would appreciate any info. Thanks

 

[Smith P.]

Some info you can get at www.LyngSat.com and some here - look for Channel's Mapping thread.
Also, a manual of Zinwell's WB68 switch will help you get the switching technics of AT-9.

 

[catman915]

Thanks to all for help.