>A DBS box splitter contains a few diodes that prevent the various boxes
>from each feeding the downconverter supply (only one does). There are
>usually instructions on which port has control. The other port is limited
>to see channels with the same polarization (as selected by the first box).

        Nice question! In Directv and Sky systems, you change the polarization in=
 the LNB? I though there was only one polarization, or circular=
 polarization. How does the IRD changes that? Changing the voltage feed to=
 the LNB?



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Alexandre Souza
taito@terra.com.br
http://planeta.terra.com.br/lazer/pinball/

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