[Scan-DC] FedEx field - NFL

[Bill]

Transcrypt is/was the Encryption Vendor and they are UHF FM [FCC Licensed to 
the NFL] GP series [last I was close to one] Portables.

Google NFL Quarterback Radio and you will find a site with audio clips

Bill Dunn    N1KUG
Cruise Ship Frequencies
http://scanmaritime.com
Now feeding USCG Sector Boston via Team Speak
info at http://www.scannewengland.net/index.php?pageid=nesflogon

----- Original Message ----- 
From: "David I. Emery" <die at dieconsulting.com>
To: "Bill" <ecps92 at earthlink.net>
Cc: "Punworg" <punworg at yahoo.com>; <scan-dc at mailman.qth.net>
Sent: Monday, November 16, 2009 10:08 PM
Subject: Re: [Scan-DC] FedEx field - NFL


> On Mon, Nov 16, 2009 at 08:33:00PM -0500, Bill wrote:
>> Even tho it's voice inversion, it's a rolling [constant changing] code
>
> While it probably isn't appropriate to ask this... there are
> rolling code systems that split the voice band into multiple chunks and
> swap them around randomly in both time and frequency (old Parkhill KY-65 
> NSA
> encryption of the early 80s), and some simpler ones that just fiddle
> around with the supressed carrier inversion frequency every so often or
> swap around a very limited number of spectrum chunks....
>
> Anyone know any actual details of this one ?   I presume it it
> nbfm otherwise...
>
>
> -- 
>  Dave Emery N1PRE/AE, die at dieconsulting.com  DIE Consulting, Weston, Mass 
> 02493
> "An empty zombie mind with a forlorn barely readable weatherbeaten
> 'For Rent' sign still vainly flapping outside on the weed encrusted pole - 
> in
> celebration of what could have been, but wasn't and is not to be now 
> either."