[Scan-DC] P25 Phase 2

[Andrew Clegg]

Rick,

This is an excellent overview of Phase 2 progress. Thanks for pointing this 
out.

My take-away from all of this is that we will never see a 6.25 kHz bandwidth 
P25 signal, only 12.5 kHz (or possibly 25 kHz) signals multiplexed with 2 
(or 4) time slots.

Cheers,
Andy

----- Original Message ----- 
From: "Rick Hansen" <Rick.Hansen at apsglobal.com>
To: <scan-dc at mailman.qth.net>
Sent: Thursday, August 07, 2008 7:12 PM
Subject: RE: [Scan-DC] P25 Phase 2


> This link works for me:
>
> www.project25.org/content/APCO%20PTIG%20TDMA%202007%20Final.pps
>
>
> Rick
>
> -----Original Message-----
> From: scan-dc-bounces at mailman.qth.net
> [mailto:scan-dc-bounces at mailman.qth.net] On Behalf Of Andrew Clegg
> Sent: Thursday, August 07, 2008 5:42 PM
> To: djoneses at verizon.net; w4jecom at w4je.com; scan-dc at mailman.qth.net
> Subject: RE: [Scan-DC] P25 Phase 2
>
> Thanks Mike and David. For some reason I thought the P25 standard would 
> have
> long since been finished and matured, but obviously not!
>
> Cheers,
> Andy
>
> -----Original Message-----
> From: djoneses at verizon.net [mailto:djoneses at verizon.net]
> Sent: Thursday, August 07, 2008 4:41 PM
> To: w4jecom at w4je.com; scan-dc at mailman.qth.net
> Subject: RE: [Scan-DC] P25 Phase 2
>
>
>  Andy,
>
> Sorry about the link problem -- it worked OK for me.
>
> The last line of the article adresses the 6.25 kHz issue, they will get
> the FCC required 6.25 KHz equivalent by creating two paths in one 12.5
> kHz channel -- so no, there is no 6.25 kHz channel.  Meeting the FCC
> requirement is the key here -- they do not need to do 6.25 if they can
> put two audio paths in one 12.5 channnel.  This is what Motorola is
> doing with its MOTOTRBO radios.  However it's not over 'til it's over!
>
> David
>
>
>
> On Thu, Aug 7, 2008 at  1:45 PM, Andrew Clegg wrote:
>
>> Thanks David. Note that to get the link to work I had to delete two
>> extra blank spaces from the end.
>
> Although it still isn't clear from this article, it appears that to meet
> a "6.25 kHz equivalent," they are instead proposing a 12.5 kHz signal
> that carries two separate time slots. So, still, no actual 6.25 kHz
> plan, as far as I can tell.
>
> Andy
>
>
> -----Original Message-----
> From: scan-dc-bounces at mailman.qth.net
> [mailto:scan-dc-bounces at mailman.qth.net]On  Behalf Of
> djoneses at verizon.net
> Sent: Thursday, August 07, 2008 12:35 PM
> To: scan-dc at mailman.qth.net
> Subject: [Scan-DC] P25 Phase 2
>
>
>
>
> I don't remember who asked about the P25 Phase 2, but here is some info
> from the APCO conference that is going on this week in Kansas City:
> http://urgentcomm.com/project25/news/project-25-phase-2-0807/
>
> David
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