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/cmx7031pp_4.pdf
Ken
From:
app_rpt-users-bounces@qrvc.com [mailto:app_rpt-users-bounces@qrvc.com] On
Behalf Of Brian Wingfield
Sent: Thursday, July 22, 2010 6:56 PM
To: app_rpt-users@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@cs.com> wrote:
Well - there is a windoz program that does it
but it is rather pricy ... apparently it is hard to do ...
Ken
-----Original Message-----
From: Jim Duuuude <telesistant@hotmail.com>
To: jrorke@cogeco.ca;
app_rpt mailing list <app_rpt-users@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@cogeco.ca
> To: app_rpt-users@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@qrvc.com
> http://qrvc.com/mailman/listinfo/app_rpt-users
=
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