[App_rpt-users] can App_Rpt decode SAME weather codes?

[Ken]

Evidently, snagging a 500 BPS tone burst and getting all the numbers right
is not easy in software. 

Better check and make sure you got it right so you don't mix up a nuclear
war with an Amber alert

 

Code Error Checking 

For best receiver decoder performance it is recommended that a software
algorithm confirm that at least two of the three header code transmissions
are identical before declaring a match or valid code and performing the
preprogrammed task. If this test fails, do a bit-by-bit check of the three
transmissions and attempt to reconstruct a valid code by comparing the bits
in each position in each header code transmission and accepting as the valid
bit that bit which appears in two of the three header code transmissions

 

Oh - that sounds easy .

 

There are some IC decoders but they are pretty fancy - perhaps some of the
radios that offer this feature use one of these chips to do most of the
signal processing in the radio

 

Example CMX7031

www.cmlmicro.com/products/twoway/previews/
<http://www.cmlmicro.com/products/twoway/previews/cmx7031pp_4.pdf>
cmx7031pp_4.pdf

 

 

Ken

 

 

 

From: app_rpt-users-bounces at qrvc.com [mailto:app_rpt-users-bounces at qrvc.com]
On Behalf Of Brian Wingfield
Sent: Thursday, July 22, 2010 6:56 PM
To: app_rpt-users at qrvc.com
Subject: Re: [App_rpt-users] can App_Rpt decode SAME weather codes?

 

The url to the S.A.M.E. spec is below.  Doesn't look like there is any magic
to it.

http://www.nws.noaa.gov/directives/010/pd01017012b.pdf




On Thu, Jul 22, 2010 at 2:37 PM, Ken <ke2n at cs.com> wrote:

Well - there is a windoz program that does it

 

http://www.brothersoft.com/tonedecoder.net-standard-edition-211249.html

 

but it is rather pricy ... apparently it is hard to do ...

 

 

Ken

 

 

-----Original Message-----
From: Jim Duuuude <telesistant at hotmail.com>
To: jrorke at cogeco.ca; app_rpt mailing list <app_rpt-users at qrvc.com>
Sent: Thu, Jul 22, 2010 2:28 pm
Subject: Re: [App_rpt-users] can App_Rpt decode SAME weather codes?


as opposed to DIFFERENT weather alert protocol...
or perhaps SIMILAR..... :-) :-)

JIM WB6NIL
> Date: Thu, 22 Jul 2010 13:12:14 -0400
> From: jrorke at cogeco.ca
> To: app_rpt-users at qrvc.com
> Subject: [App_rpt-users] can App_Rpt decode SAME weather codes?
> 
> Hi All just wondering if App_Rpt can or does support of decoding the 
> SAME weather alert protocol and signaling??
> 
> Thanks,
> 
> Jon VA3RQ
> 
> 
> _______________________________________________
> App_rpt-users mailing list
> App_rpt-users at qrvc.com
> http://qrvc.com/mailman/listinfo/app_rpt-users

= 

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