Take a look at some kind of radio guide (or your existing FM tuner's dial ) : if FM frequencies are at 100kHz intervals, put it on 'Europe'. European range is 88MHz to 108MHz; I don't know for USA.
(Guys@empeg, is freq. spacing the only difference? If so, then 'Europe' setting is safe everywhere, isn't it?)
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Dragi "Bonzi" Raos Q#5196 MkII #080000376, 18GB green MkIIa #040103247, 60GB blue