GPS receivers work with very different IF concepts! There is no common
frequency at all.
- Henry
--
ehydra.dyndns.info
Burt I. Weiner schrieb:
For many years the FCC has not allowed FM broadcast stations within
certain distances of each other where a 10.7 MHz frequency difference
existed. Not exactly the same thing, but did show an understanding of
what can go wrong as a result of good receiver front end selectivity.
In AM and FM broadcasting there has also been required distances between
1st and 2nd adjacent channels, only partially because of overload issues
but more so because of occupied bandwidth and overlapping. I'm not sure
how much more it would cost to build GPS receivers with better front
ends, but I'm sure it would've priced GPS devices out of the hands of
many consumer level users. The FCC under the direction of Congress has
made (allowed) some pretty stupid moves in the past bunch of years. In
my opinion, the FCC has forgotten what their purpose is, and being run
by attorneys has made the situation that much worse as there are very
few attorneys that understand the un-revocable physics of the
electromagnetic spectrum.
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