[ICOM] R7000 dumb question of the day

[Sheldon Daitch]

All depends!

Many splitters are indeed DC blocking.

See:

http://www.tselectronic.com/pico/tsst_splitter.html?tse_Session=9ae48b87c6eaadf9d4e8ec500fd3ec18

Note that the tap is 12 dB down, the way I read the spec.  Tru-Spec used to
make a zero loss splitter, which we used for satellite systems, specifically
where we had two receviers fed from the same dish.  The splitter fed both
receviers with no loss and with the DC path pass/blcok, one recevier fed the
LNB voltage thorugh the spliiter, powering both the splitter and the LNB.  The
DC blocked path was used for the RF path to the second recevier, and kept DC
off its input.

Problem is, I don't see that powered splitter in the few sites I visited.

Also see:

http://www.dawnsat.com/site_html/***Show***_Catalog=DAWNsat_Category=All_SubCat=All_.html

Hope this adds to the discussion.

Sheldon


Alex Eban wrote:

> ...hi guys:
> Correction : none of these are DC blocks!!!
> The T type splitters are transformer coupled!
> The termination shown has only a resistor inside usually 50 or 75 ohms no
> capacitor.
> The T-bias network is designed expressly for inserting DC not blocking it.
> If you need a DC block try Florida RF labs or Pasternak electronics.
> Alex    4Z5KS
>
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