[BC] FM Modulators for Satellite Radio

[Richard Fry]

Rich Wood:
>I no longer subscribe to satellite radio but I have a modulator
>that's inserted in the car radio's antenna line. It doesn't radiate
>and overwhelms any other signal.
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Just curious, does the receiving antenna get disconnected when you're using 
the modulator?  If not, then the r-f output of the modulator could radiate 
plenty from the car's antenna, unless it is injected through some kind of 
directional coupler -- which seems a bit exotic for this kind of a device.

RF