I am new to scanning, and I live in Europe where we do not have
such thing as a DIGITAL scanner. Could you please explain to me
what is a digital scanner ? What does it do that other scanners do
not ? Thanks.

A lot of public safety agencies (police, in particular) are switching to
digital radio systems. Conventional scanners can not monitor these comms. These
overly expensive digital scanners can monitor them.
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73! de Andy KC2SSB - WPYI880 (GMRS)
Beachwood, NJ USA! Grid FM29vw
http://vhfradiobuff.tripod.com