[App_rpt-users] RELAXED RADIO parms

[David KE6UPI]

look for:

Post Date 6/13/12
Subject RTCM falsing DTMF

Please read it all !!!!

David

On Thu, Sep 19, 2013 at 5:47 AM, Keith Goobie <keith at goobie.org> wrote:

>  Good morning All.
>
> I am looking for the message that Jim WB6NIL put out there that had to do
> with modifying the dsp.c code so that it did not incorporate the
> RELAXED_RADIO parameters.
>
> One parameter is the length of time that a DTMF signal must be present
> before it is determined not to be a false signal.
> [root at Server6 main]# diff  dsp.c.default  dsp.c
>
> 165c165,166
> < #define DTMF_TO_TOTAL_ENERGY    ((digitmode & DSP_DIGITMODE_RELAXDTMF) ?
> 26.0 : 42.0)
> ---
>
> > #define DTMF_TO_TOTAL_ENERGY    ((digitmode & DSP_DIGITMODE_RELAXDTMF) ?
> 38.0 : 42.0)  /* CAH changed 26 to 38 */
>
> This change when implemented, did eliminate a noticeable number of audio
> pops associated with DTMF false-ing.
>
> The message from Jim spoke to bypassing the RELAXED parameters in total.
>
> I am going through  the archives and I have not found it yet.
>
> Thanks in advance.
>
> Keith
>
> --
> keith at goobie.org
> Keith Goobie
> Richmond Hill, ON, CANADA
>
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>
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