<div dir="ltr"><font face="times new roman, serif">look for:</font><div><font face="times new roman, serif"><br></font></div><div><font face="times new roman, serif">Post Date 6/13/12</font><div><font face="times new roman, serif">Subject </font><span style="font-family:'times new roman',serif">RTCM falsing DTMF</span></div>
<div class="gmail_extra"><br></div><div class="gmail_extra">Please read it all !!!!</div><div class="gmail_extra"><br></div><div class="gmail_extra">David<br><br><div class="gmail_quote">On Thu, Sep 19, 2013 at 5:47 AM, Keith Goobie <span dir="ltr"><<a href="mailto:keith@goobie.org" target="_blank">keith@goobie.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<font face="Arial"><span style="font-size:12pt">Good morning All.<br>
<br>
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.<br>
<br>
One parameter is the length of time that a DTMF signal must be present before it is determined not to be a false signal. <br>
</span></font><font color="#0000FE"><font><font face="Garamond"><span style="font-size:10pt">[root@Server6 main]# diff dsp.c.default dsp.c<br>
</span></font></font></font><blockquote><blockquote><font color="#0000FE"><font><font face="Garamond"><span style="font-size:10pt">165c165,166<br>
< #define DTMF_TO_TOTAL_ENERGY ((digitmode & DSP_DIGITMODE_RELAXDTMF) ? 26.0 : 42.0)<br>
---<br>
</span></font></font></font></blockquote></blockquote><font color="#0000FE"><font><font face="Garamond"><span style="font-size:10pt">> #define DTMF_TO_TOTAL_ENERGY ((digitmode & DSP_DIGITMODE_RELAXDTMF) ? 38.0 : 42.0) /* CAH changed 26 to 38 */<br>
</span></font></font></font><font face="Arial"><span style="font-size:12pt"><br>
This change when implemented, did eliminate a noticeable number of audio pops associated with DTMF false-ing. <br>
<br>
The message from Jim spoke to bypassing the RELAXED parameters in total.<br>
<br>
I am going through the archives and I have not found it yet.<br>
<br>
Thanks in advance.<span class="HOEnZb"><font color="#888888"><br>
<br>
Keith<br>
<br>
-- <br>
<a href="http://keith@goobie.org" target="_blank">keith@goobie.org</a><br>
Keith Goobie<br>
Richmond Hill, ON, CANADA<br>
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