> The problem is, in general anyway, that a radio reciever detects RF (radio > frequency) signals and at some point generates IF (intermediate frequency) > signals. This pretty much needs to happen whether the final signal is analog > (FM radio) or digital (GPS, cell phone). How much IF a GPS reciever > generates is up for debate, but most are 12 channels, so you can do the math > there. Note, too, that airlines tell you never to use an FM or AM radio > during any portion of a flight. Actually this depends alot on the type of receiver. Most receivers generate a signal then look at how that signal is distorded to captrure the signal the want to see. There are many newer radios that don't do this. These radios don't generate much EMI at all. The FCC has been activly encouraging companies to build receivers using the new methods. I think it's a requirement for all cell phones as well as alot of the new bands that have been opened up in the past few years. Off band radiative emmisions regulations have been really tightened up. #------------------------------------# | Bryan Andersen | |,
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