<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman",serif;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><a name="UNIQUE_ID_SafeHtmlFilter__MailAutoSig"><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Hayden,<o:p></o:p></span></a></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>The time is in UTC, as reported by the RTCM. The system time is typically a couple minutes off, but it wanders a bit. Ergo, each time command 98 is executed, a different delta is reported.<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>I’m not aware of a full calibration routine, what are you referring to?<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>The GPS is connected at 9600 baud.<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>The RTCM’s have been modified to accept an external 9.6MHz reference, which is locked to GPS.<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>This is the relevant output from command 98:<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Current Time: Fri Jun 01, 2018 00:17:43.740<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Last Rx Pkt System time: 06/01/2018 00:16:08.440, diff: 95300 msec<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Last Rx Pkt Timestamp time: 06/01/2018 00:16:08.440, diff: 0 msec<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Last Rx Pkt index: 160, inbounds: 1<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Does “System Time” reference the time on the computer which apt_rpt executes?<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:UNIQUE_ID_SafeHtmlFilter__MailAutoSig'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Kindest Regards,</span></span><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'> <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Kevin Babich | N9IAA<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Valparaiso, IN 46383<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'><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'> App_rpt-users <app_rpt-users-bounces@lists.allstarlink.org> <b>On Behalf Of </b>Hayden Honeywood<br><b>Sent:</b> Thursday, May 31, 2018 5:56 PM<br><b>To:</b> app_rpt-users@lists.allstarlink.org<br><b>Subject:</b> Re: [App_rpt-users] RTCM [RX Packet Out of Bounds] ***Updated***<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><div><div><p class=MsoNormal>Is the time in UTC? How far off is the system time?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Have you done a full calibration of each board?<o:p></o:p></p></div><div><p class=MsoNormal>What baud rate do you run on your GPS's?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I tend to use 9600 baud and have had no issues with the GPS's I have used.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>There is various GPS debug tools available in the RTCM. They are documented here - <o:p></o:p></p></div><div><p class=MsoNormal><a href="https://wiki.allstarlink.org/wiki/RTCM_Client#GPS">https://wiki.allstarlink.org/wiki/RTCM_Client#GPS</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Can you possibly try injecting a 9.6MHz signal in place of the crystal on board? Perhaps you have a variant of James KI0KN's problem where his crystals were off frequency.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I can't comment on that as I built all my boards and they have external frequency references.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Regards<o:p></o:p></p></div><div><p class=MsoNormal>Hayden VK7HH<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><p class=MsoNormal style='margin-bottom:12.0pt'><br>From: App_rpt-users <<a href="mailto:app_rpt-users-bounces@lists.allstarlink.org">app_rpt-users-bounces@lists.allstarlink.org</a>> On Behalf Of Hayden Honeywood<br>Sent: Wednesday, May 30, 2018 5:34 PM<br>To: <a href="mailto:app_rpt-users@lists.allstarlink.org">app_rpt-users@lists.allstarlink.org</a><br>Subject: Re: [App_rpt-users] RTCM [RX Packet Out of Bounds] ***Updated***<br><br><br><br>What is your values in voter.conf for RX buffer (960) and in the RTCM client for TX buffer (480). Are all RTCM TX buffers set to the same value? Yes, 480. These values were based upon the math Jim provided, which is a function of maximum latencies on the network. We rarely have greater than 1ms to any host on the network.<br><br><br><br>Are all the GPS's in a location where they cannot be swamped with RF? Yes, and they utilize PCTEL antennas with filtering for use in RF dense environments.<br><br><br><br>Some users have had success with a dedicated RTCM as the master timing source (with no radio connected). Has it been suspected that an RTCM doesn’t have the horsepower to handle both functions contemporaneously?<br><br><br><br>Regards<br><br>Hayden VK7HH<br><br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <<a href="http://lists.allstarlink.org/pipermail/app_rpt-users/attachments/20180530/24a4675d/attachment-0001.html" target="_blank">http://lists.allstarlink.org/pipermail/app_rpt-users/attachments/20180530/24a4675d/attachment-0001.html</a>><br><br>------------------------------<br><br>Message: 3<br>Date: Wed, 30 May 2018 19:51:43 -0500<br>From: "Kevin Babich" <<a href="mailto:kevin.babich@gmail.com">kevin.babich@gmail.com</a>><br>To: "'Users of Asterisk app_rpt'"<br> <<a href="mailto:app_rpt-users@lists.allstarlink.org">app_rpt-users@lists.allstarlink.org</a>><br>Subject: Re: [App_rpt-users] RTCM [RX Packet Out of Bounds]<br> ***Updated***<br>Message-ID: <010001d3f879$8c2b3710$a481a530$@<a href="http://gmail.com" target="_blank">gmail.com</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>Hayden,<br><br><br><br>Do you know what exactly “RX Packet Out of Bounds” refers to? I can infer its meaning, but, one can’t be certain. Any thoughts why the system time is always so far off? It has always been, since I began experimenting with the RTCM in 2012. This is consistent across many RTCM’s.<br><br><br><o:p></o:p></p></blockquote></div></div></div></div></body></html>