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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">That is true. The FEC is on the voice with 2400 bits for voice and 1200 for FEC.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">John WB4QDX<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> drats_users-bounces@intrepid.danplanet.com [mailto:drats_users-bounces@intrepid.danplanet.com]
<b>On Behalf Of </b>Daniel Metcalf<br>
<b>Sent:</b> Friday, September 20, 2013 4:55 PM<br>
<b>To:</b> Discussion of D-RATS<br>
<b>Subject:</b> Re: [drats_users] ERROR Correction in slow speed data<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p>Agreed. From what I have read d-star is a lot like the UDP network protocol where it is transmit and forget there is no handshaking / error correction built in. It is up to the application developer to handle error correction and the d-rats package does
perform some level of error correction.<o:p></o:p></p>
<p>Dan Metcalf - KB3UUN.<o:p></o:p></p>
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<p class="MsoNormal">On Sep 20, 2013 3:54 PM, "John Davis" <<a href="mailto:jdavis@gtworks.com">jdavis@gtworks.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">My understanding is that the low speed data channel does NOT have error correction, however, D-RATS
offers Error correction in Message and File Transfer modes where it is most important.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">John WB4QDX</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">
<a href="mailto:drats_users-bounces@intrepid.danplanet.com" target="_blank">drats_users-bounces@intrepid.danplanet.com</a> [mailto:<a href="mailto:drats_users-bounces@intrepid.danplanet.com" target="_blank">drats_users-bounces@intrepid.danplanet.com</a>]
<b>On Behalf Of </b>Dave Welker<br>
<b>Sent:</b> Friday, September 20, 2013 3:19 PM<br>
<b>To:</b> D-Rats Mailing List<br>
<b>Subject:</b> [drats_users] ERROR Correction in slow speed data</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">Hello all,</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">Can anyone confirm if the D-RATS slow speed data has FEC (Forward Error Correction) built in now or not?</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">I understand that D-STAR voice does have error correction built in. I've checked on the D-RATS home page/documentation</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">which is a August 2009 reference.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">This is what I found in this document Under users manual/files: Is this still current information?</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p style="margin:0in;margin-bottom:.0001pt;background:white;word-spacing:0px"><strong><span style="font-family:"Verdana","sans-serif";color:#666666">Unlike the D-STAR DV Voice Channel, which has error correction built into the protocol, the Data Sub-channel
has no error correction. </span></strong><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;line-height:11.25pt;background:white;word-spacing:0px">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:#666666"> </span><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;background:white;word-spacing:0px"><strong><span style="font-family:"Verdana","sans-serif";color:#666666">This makes the transfer of data across D-STAR a lot more dependant on a good radio path being established between
the two locations wishing to </span></strong><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;line-height:11.25pt;background:white;word-spacing:0px">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:#666666"> </span><o:p></o:p></p>
<p style="margin:0in;margin-bottom:.0001pt;background:white;word-spacing:0px"><strong><span style="font-family:"Verdana","sans-serif";color:#666666">exchange data. D-RATS includes the ability to test connectivity between two locations</span></strong><strong><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:#666666">.</span></strong><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">Thanks in advance</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">regards</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">Dave</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">W2SRP</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">Goals are where we want to be;<br>
Objectives are the steps to get there.</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-family:"Century Gothic","sans-serif"">There are 2 rules to success in life:<br>
1. Don't tell people everything you know.</span><o:p></o:p></p>
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_______________________________________________<br>
drats_users mailing list<br>
<a href="mailto:drats_users@intrepid.danplanet.com">drats_users@intrepid.danplanet.com</a><br>
<a href="http://intrepid.danplanet.com/mailman/listinfo/drats_users" target="_blank">http://intrepid.danplanet.com/mailman/listinfo/drats_users</a><o:p></o:p></p>
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