See my previous comments - that's how I have mine operating currently.
I am experiencing 'Alternator Whine', (see my previous post
[ I just finished the installation of an XM Commander on my '01 K1200LT. The Control Head, (Controller/Display), installs nicely on top of the the Tape player in the Oddments Box while the Receiver Unit is installed on a foam pad where the Canister used to be located in front of the alarm siren under the trunk behind the passenger's seat.
I connected the accessory power lead to the green seat heat power wire next to the left fuse box under the passenger seat. That way the Receiver operates only after the key is turned to the on position. The Fused Power lead and the ground is connected to the Blue Ocean six fuse aux fuse box I installed on top of the battery. (Maybe that ground connection is a source of my alternator whine.)
The 'FM Out'' Relay Switch, (FM Modulator), installs between the bikes OEM male end lead from the OEM antenna and the OEM female antenna socket that serves the radio. It fits nicely under the Radio's tupperware cover behind the 3 plug mounts on the left side of the radio. It fitted in there nicely along with the extra 4-5' of wire connected to the Controller / Display in the Oddments box).
I installed the XM Radio Satellite antenna, (along with my GPS antenna), on a ground plane that I constructed and installed under the windshield just above the headlite assy in accordance with the instructions that fellow member Randy Prada posted [
http://www.bmwlt.net/ubbthreads/sho...&Number=27289&page=13&view=collapsed&sb=5&o=0 ]. (Thanx Randy, it works perfectly and the reception from both the XM Radio and the GPS has been bullet proof no matter which direction I've traveled thru the mountains north of here}
The biggest problem I've experienced with the use of the 'FM Out' (FM Modulator) connection is just what Arnold Hermes said about the lower FM freq's. interferring with the Sat. Radio transmission. Its a blasted annoance to have to hunt for a clear freq. everytime another transmission bleeds thru on top of the XM Radio reception HOWVER, it is nice to be able to control the volume and speaker selection via the OEM radio. You don't have that option when you connect the Receiver directly to an aftermarket intercom system. (At least I'm not able to with my old J&M MI-1550 Intercom.)
When I replace my old J&M Intercom with an Autocom system I plan to solve the volume control problem with individual rider and pax volume controls. That way I can connect the XM Radio Receiver directly into the intercom and keep the OEM Radio / CD Changer 'uninterferred with'. (I've always wanted to use that phrase somewhere - it just popped out here. Honest !)
I will post the pics. i took with my new 5 megapixel camera of the XM Radio installation and the Antenna Ground Plane construction and installation as soon as I can assemble them.
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which is NOT because of the FM Adapter that came with the XM Commander and the "Universal Tuner Box" but thru my old J & M intercom Model MI-1550.