I'm having trouble with the reception of my Audiovox Sirius plug and
play device in my car. If I so much as drive under a tree, I get drop
outs. I've heard that they have terrestrial repeaters that are
supposed to cure this. I noticed an input on the back of the cradle
for a terrestrial antenna, but haven't been able to find one. If I
unplug my antenna from the SAT input, and plug it into the terrestrial
input, the unit says "No Antenna Found".

Can anyone help with this?

Thanks,
Kirk