On Fri, 30 Sep 2005 23:45:46 -0400, Al Klein wrote:

On Sat, 01 Oct 2005 01:43:09 GMT, Korbin Dallas
said in rec.radio.scanner:

On Fri, 30 Sep 2005 11:29:31 -0400, Al Klein wrote:
On Fri, 30 Sep 2005 13:35:23 GMT, "Jim Hackett"
said in rec.radio.scanner:

Digital?

Most of what we call "digital" is NFM or SNFM.

Actually "Digital" is C4FM.

And the modulation on the carrier is??? AM? PM?? FM??

What bandwidth is it?

There's a difference between the process of putting information on the
carrier and the format that information comes in. The OP was asking
about the physical layer, as specified by "AM/FM ..." etc..

The standard is APCO 25, which defines BW to be 6Khz and Modulation as
C4FM.

For more details see: http://www.apcointl.org/frequency/project25/

--
Korbin Dallas
The name was changed to protect the guilty.