[FedCom] POTUS New Hampshire

[*Bill]

http://www.radioreference.com/digital/dig/apco25.wav
APCO P-25

http://www.radioreference.com/digital/dig/apco25cntrl.wav
P-25 Control Channel

http://www.radioreference.com/digital/dig/astro.wav
ASTRO 

http://www.radioreference.com/digital/dig/astro96k.wav
Astro 9600

http://www.radioreference.com/digital/dig/trunkedastro.au
Trunked Astro 


Hope this helps


Bill Dunn   N1KUG
http://home.earthlink.net/~ecps92/cruise_ships.htm


----- Original Message ----- 
From: "Rankin, Robert L" <rankin@ku.edu>
To: <fedcom@mailman.qth.net>
Sent: Monday, March 29, 2004 15:38
Subject: RE: [FedCom] POTUS New Hampshire




> Being that I'm from the land that time forgot when it comes to 
communications. We have no digital or trunking, ... . So how can you 
tell the difference between P25 encrypted and DVP ?  I must assume that 
they sound different somehow.

They do, in fact.  DES generally has the high pitched tone at the end of
each transmission.  P25 has a more undulating sound and then a loud
"brrrrrraaaap" at the end of each xmsn.  Once you hear both, it's pretty
clear.

Bob, w0nxn
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