<div dir="ltr">The timing of one second comes from the GPS satellites and is accurate. <div>Chuck</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Apr 9, 2016 at 7:03 PM, Joe Leikhim <span dir="ltr"><<a href="mailto:rhyolite@leikhim.com" target="_blank">rhyolite@leikhim.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
According to the original documentation for the first generation X1
is a SER3418-ND 9.60MHz 18pf 30ppm. <br>
<br>
So 9.6 x (+/-) 30 = +/- 288 Hz.<br>
<br>
My question is If the same processor is doing the A/D conversion AND
checking the number of samples/second why would there be a
discrepancy regardless of the timing offset? Or is the error at the
receiving end??<div><div class="h5"><br>
<br>
<br>
<br>
<div>On 4/9/2016 2:16 PM, James Cizek wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr">Sure Willem, in voter.c, the stock line is:
<div><br>
</div>
<div>if ((samplecnt >= 7999) && (samplecnt <=
8001))<br>
</div>
<div><br>
</div>
<div>it needs to be changed to something like:</div>
<div><br>
</div>
<div>if ((samplecnt >= 7999) && (samplecnt <= 8003
))<br>
</div>
<div><br>
</div>
<div>That was just enough to make my first RTCM work. I've had
a chance now to check a few more of my RTCMs on the bench this
morning and the crystal frequencies are kind of all over. The
next one I had on the bench was 5.2Khz fast. The above code
was still not enough to fix it (as would be expected) so it
looks like the quality control on whatever manufacturer that
crystal is, isn't very good (or a low tolerance crystal is
being used). I am going to pursue crystal replacement to get
a highly accurate, stable, on-frequency crystal in there as my
first choice. Changing the firmware 5 different times doesn't
seem like the right answer.</div>
<div><br>
</div>
<div>Jim put that sanity check in there for a reason. Working
around it *may* allow the device to work, but to me, it seems
getting the hardware operating the way it was supposed to
originally is the better answer. I will follow up with
Micro-node and let you all know how it goes.</div>
<div><br>
</div>
<div>Thanks.</div>
<div><br>
</div>
<div>James</div>
<div>KI0KN</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, Apr 9, 2016 at 9:05 AM, Willem
Schreuder <span dir="ltr"><<a href="mailto:willem@prinmath.com" target="_blank">willem@prinmath.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>On Sat, 9 Apr 2016, James Cizek wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Jim helped adjust the code to be more tolerant of the
sampling error and my whole system instantly worked.<br>
</blockquote>
<br>
</span>
Could you please share the code adjustment for future
reference.<br>
<br>
================================================================<br>
Dr. Willem A. Schreuder, President, Principia Mathematica<br>
Address: 445 Union Blvd, Suite 230, Lakewood, CO 80228,
USA<br>
Tel: <a href="tel:%28303%29%20716-3573" value="+13037163573" target="_blank">(303) 716-3573</a> Fax: <a href="tel:%28303%29%20716-3575" value="+13037163575" target="_blank">(303) 716-3575</a><br>
WWW: <a href="http://www.prinmath.com" rel="noreferrer" target="_blank">www.prinmath.com</a> Email: <a href="mailto:Willem.Schreuder@prinmath.com" target="_blank"></a><a href="mailto:Willem.Schreuder@prinmath.com" target="_blank">Willem.Schreuder@prinmath.com</a><br>
</blockquote>
</div>
<br>
</div>
<br>
<fieldset></fieldset>
<br>
</div></div><span class=""><pre>_______________________________________________
App_rpt-users mailing list
<a href="mailto:App_rpt-users@ohnosec.org" target="_blank">App_rpt-users@ohnosec.org</a>
<a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a>
To unsubscribe from this list please visit <a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a> and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button"
You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem. </pre>
</span></blockquote>
<br>
<pre cols="72">--
Joe Leikhim
Leikhim and Associates
Communications Consultants
Oviedo, Florida
<a href="mailto:JLeikhim@Leikhim.com" target="_blank">JLeikhim@Leikhim.com</a>
<a href="tel:407-982-0446" value="+14079820446" target="_blank">407-982-0446</a>
<a href="http://WWW.LEIKHIM.COM" target="_blank">WWW.LEIKHIM.COM</a></pre>
</div>
<br>_______________________________________________<br>
App_rpt-users mailing list<br>
<a href="mailto:App_rpt-users@ohnosec.org">App_rpt-users@ohnosec.org</a><br>
<a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" rel="noreferrer" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br>
<br>
To unsubscribe from this list please visit <a href="http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users" rel="noreferrer" target="_blank">http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users</a> and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button"<br>
You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem. <br></blockquote></div><br></div>