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[ale] Wandering OT: Re: Car PC's and internet radio?

Again, my hypothesis suggests very infrequent, very low-bandwidth uplink
transmissions.  Recall the handheld satellite phone and its power
requirements in order to solve a much, much harder uplink problem.

There is no reason to assume that cell phones and a possible XM radio
uplink use anywhere near the same frequencies.  Note that an airport
concouse full of simultaneously running cellphones *are* in the *same
segment* of the *same band* and manage to not interfere. 

Jim Popovitch wrote:
>> I can't speak for all satellite radios, but my Sirius one couldn't
>> possibly be uploading anything.  It would drain the battery if it did...
>> plus the receiver sits 10 inches away from my head... and if it was
>> transmitting I seriously doubt that my cellphone would work without any
>> interruption.  YMMV.
> Also, my sat receiver is at most 3 inches in diameter and 1 inch thick.
> Sat transmitters on, critical care and transport trucks, would have
> trouble fitting in a one foot square box.