Well, thanks for the replies so far. Obviously I won't be able to
hear NSA or AF1 etc even though they use the same frequency spectrum
for communication. Most likely they'd use spread spectrum and/or some
other kind of encryption. Theoretically any type of signal that can
be encoded can be decoded. So, am I correct that scanners can't
receive and decode ALL signals even if they are in standard AM, FM,
SSB modes?

I'd be dumbfounded if AF1 broadcasts in standard AM mode on 126.5 MHz
for instance. Thus, having a scanner that covers airband wouldn't be
able to receive AF1 communication.

(Vic Martinez) wrote in message ...
You won't recieve Air Force One(oops! 'Echelon' just picked up that one)
The NSA,(they're on their their way to my house) and the FBI.(excuse me,
the 'men in black' are at my door. Boy! those guys are fast!)