I received a Sirius satellite system and subscription with the new
Audiovox receiver. At home, the signal is wonderful. But there is a
problem listening in the car that is making me think of returning the
whole thing.

Problem: There is very bad static resembling AM radio reception when
listening to Sirius in my car . The signal bars on the satellite
radio indicate 2 or 3 bars. After the initial installation, the FM
radio station assigned to that frequency kept interrupting the
satellite signal. Called Sirius; they told me to adjust the lever on
the side of the mobile mount and select different FM radio frequencies
- this did not work. I took the car back to Circuit City, had the
mobile dock hard-wired under the dash (not plugged into the cigarette
adaptor). The radio interruption is not happening anymore, but the
static still is.

Other information if it matters: the car is a 2001 Honda Accord;
mobile dock is installed in the center console under the dash; the
antennae is on my trunk.

Questions:
1) Is the static typical of satellite radio?
2) If not, any suggestions for solutions?

Thank you for any advice.
Cindy