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<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'>REF
TEK would like to add little bit more history on the 1 second GPS
problem using Garmin "Puck" 16x Model</span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'>.-
Troubleshooting has been performed since it was reported back in
December 2010 by PASSCAL when they were running bench tests.</span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'> PASSCAL
reported seeing some discrepancies that seemed to follow GPS Firmware
3.30. REFTEK did not see the same problem with similar bench tests.</span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'>
REF TEK requested PASSCAL to send specific DAS and GPS’s
showing discrepancies after we could not duplicate the problem.</span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'> Further
bench tests included downgrading/upgrading Garmin firmware from 3.0 to 3.6</span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'>
The possible 1 second discrepancy became obvious and appeared more often under
3.6 firmware and was immediately reported to Garmin.</span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'>Garmin's
initial Response :</span></font><font color=black><span style='color:
windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color="#1f497d"
face=Calibri><span style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>"What’s
happening is that there is a tendency for the latency between the rising edge
of PPS and the onset of the NMEA 0183 record to gradually increase over
time. We identified the cause of this increasing latency and we have
fixed the problem. </span></font><font color="#1f497d"><span
style='color:#1F497D'>This was introduced after version 2.80 when we added the
PGRMID sentence. Handling of this sentence should have been done at power
up, but was done instead every second. To get the information, it
involves going through the internal database. As the database grows
in size, the latency increases. The handling of this ID information is
now done only at power up and so the latency issue is no longer present.</span></font><font
color=black><span style='color:windowtext'>”<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'>This
problem could potentially affect the Garmin 16x GPS but it is not consistent
and doesn’t always show up in units running side by side. </span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'>The
discrepancy messages logged by the DAS indicate that the DAS has detected an
inconsistency in time from the GPS. If these messages show up four
consecutive GPS cycles, the DAS changes its time to match the
GPS. A single or periodic discrepancy message doesn’t
necessarily means that the DAS timing is off. So, if that message
repeats 4 times in a row then the 130 will change its time to match the
GPS. If the GPS is on duty cycle mode ( normal ) then this process
will take 4 hours. If the GPS is in continuous mode then it takes about
an hour. One way to detect if your 16X is currently affected is by checking the
DAS SOH files for discrepancy messages</span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'> <o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:windowtext'>REF
TEK strongly recommends upgrading Garmin 16x models to 3.70 firmware as soon as
is convenient. Please contact our support team,
http://support.reftek.com or email at support@reftek.com, for information on
how to upgrade Garmin 16x units or options for REF TEK to do this for you.<o:p></o:p></span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:windowtext'>Antonio </span></font><font
size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:windowtext'> </span></font><font
color=black><span style='color:windowtext'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:windowtext'>Antonio
Sanchez</span></font><font color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:windowtext'>REFTEK
Customer Support Manager</span></font><font color=black><span style='color:
windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:windowtext'>Refraction
Technology Inc </span></font><font color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal><st1:address w:st="on"><st1:Street w:st="on"><font size=2
color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:windowtext'>1600 10th Street</span></font></st1:Street><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:windowtext'> <st1:City w:st="on">Plano</st1:City>
<st1:State w:st="on">TX</st1:State> <st1:PostalCode w:st="on">75074</st1:PostalCode>
<st1:country-region w:st="on">USA</st1:country-region></span></font></st1:address><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:windowtext'>Ph 214
440-1265</span></font><font color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:windowtext'>Ph 214
440-1271 (direct)</span></font><font color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:windowtext'><a
href="http://www.reftek.com/">http://www.reftek.com</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:windowtext'>http://support.reftek.com</span></font><font
color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> anss-netops-bounces@geohazards.usgs.gov
[mailto:anss-netops-bounces@geohazards.usgs.gov] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Bridget O'Neill<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, July 15, 2011 12:23
PM<br>
<b><span style='font-weight:bold'>To:</span></b>
anss-netops@geohazards.usgs.gov<br>
<b><span style='font-weight:bold'>Subject:</span></b> [ANSS-netops] Fwd: Re:
[Managers] Fwd: Fwd: Fwd: bug in Reftek "Model 16X" Garmin GPS
receiver (details from Reftek)</span></font><font color=black><span
style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial'>Hello -<br>
<br>
Kent Anderson suggested I forward this thread to this
forum. <br>
<br>
</span></font><br>
-------- Original Message -------- <o:p></o:p></p>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0>
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<td nowrap valign=top style='padding:0in 0in 0in 0in'>
<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>Subject: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Re: [Managers] Fwd: Fwd: [ANSS-netops] Fwd: bug in
Reftek "Model 16X" Garmin GPS receiver (details from Reftek)<o:p></o:p></span></font></p>
</td>
</tr>
<tr>
<td nowrap valign=top style='padding:0in 0in 0in 0in'>
<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>Date: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Fri, 15 Jul 2011 11:17:39 -0600<o:p></o:p></span></font></p>
</td>
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<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>From: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Bridget O'Neill <a href="mailto:brit@passcal.nmt.edu"><brit@passcal.nmt.edu></a><o:p></o:p></span></font></p>
</td>
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<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>To: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Bruce Beaudoin <a href="mailto:bruce@passcal.nmt.edu"><bruce@passcal.nmt.edu></a><o:p></o:p></span></font></p>
</td>
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<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>CC: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Robert Busby <a href="mailto:busby@iris.edu"><busby@iris.edu></a>,
Kent Anderson <a href="mailto:kent@iris.edu"><kent@iris.edu></a>, <a
href="mailto:croker@usgs.gov">croker@usgs.gov</a>, James Gridley <a
href="mailto:James.Gridley@iris.edu"><James.Gridley@iris.edu></a>, <a
href="mailto:managers@passcal.nmt.edu">managers@passcal.nmt.edu</a>, <a
href="mailto:woodward@iris.edu">woodward@iris.edu</a>, <a
href="mailto:dietz@usgs.gov">dietz@usgs.gov</a><o:p></o:p></span></font></p>
</td>
</tr>
</table>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
</span></font><font face=Arial><span style='font-family:Arial'>One other thing
I should have added -<br>
<br>
In the SOH log messages, if the initial EXTERNAL CLOCK IS
UNLOCKED message is missing all the time and you are NOT using a 16x GPS with
3.7 firmware - that is an indication that the DAS power to the clock is stuck
ON. I believe it is U2 on the RT130 Lid board that needs to be replaced
to fix that. We have a check for this issue in our routine bench testing
of RT130's when they return from the field. For some idea of the
frequency of this issue - we've made about 15 of these repairs so far this
year. <br>
<br>
- Brit <br>
</span></font><br>
On 7/15/11 11:00 AM, Bridget O'Neill wrote: <o:p></o:p></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial'>Hi, Everyone -<br>
<br>
I just brought this up at last weeks PASSCAL manager
coordination meeting. There was a problem with the 16x receivers that we
noted in January after updating the firmware on the few that we had at that
time. The DAS logs had numerous possible 1 second discrepancies,
i.e: <br>
<br>
INTERNAL CLOCK POSSIBLE DISCREPANCY OF -1 SECONDS<br>
<br>
We did not let any of our 16x, or 15x go to the field with this
firmware. (We are using 15x receivers from Garmin to repair our older
style Reftek GPS, but they did have this same issue.) <br>
We contacted Reftek. Initially they didn't see the
problem in 16x's that they had on hand. We sent them several of our GPSs
and DASs and then they did confirm the problem. I think they then
confirmed the problem in new 16x's they had, presumably after putting the
_then_ latest Garmin firmware on them. They contacted Garmin, and Garmin
has recently released new firmware, version 3.7, with this issue fixed.
We have not seen any further occurrence of this problem in our testing at
PASSCAL. <br>
It is also my understanding, from Reftek, from their
conversations with Garmin, that this bug was introduced after the 2.7
firmware. If your 16x has the 2.7 firmware it is supposedly ok.
Reftek said that they were shipping 16x's with 2.7 firmware between the
discovery of the issue and Garmin's release of the 3.7 firmware.<br>
If you look on the back of your hockey puck style GPS, you
can see whether it is a 16-HVS or a 16x-HVS. We have not seen any
problems with the non-x 16-HVS.<br>
There is something else to be aware of with the 3.7 firmware
though. The clock locks very fast. Normally, the log messages you
would have seen from the DAS during the clock On cycle were:<br>
<br>
EXTERNAL CLOCK POWER IS TURNED ON<br>
EXTERNAL CLOCK WAKEUP<br>
EXTERNAL CLOCK IS UNLOCKED<br>
EXTERNAL CLOCK IS LOCKED<br>
(approximately 20 minutes of phase error messages)<br>
EXTERNAL CLOCK IS UNLOCKED<br>
EXTERNAL CLOCK POWER IS TURNED OFF<br>
<br>
The time between the power turn on and the DAS first polling the clock for its
status, and getting the first unlocked message, is about 5 seconds. Now
the clock usually (but not 100% of the time) locks within that five seconds, so
you don't get the first unlocked message. This produces a pattern in the
logpeek trace of the clock lock/unlock cycle that is different from what people
are used to seeing. However, I have confirmed with Reftek that there is
no problem there. If the clock is shielded somewhat, so that it takes
longer to lock, then you will get the old familiar pattern of messages and
sawtooth (rather than zigzag) trace in logpeek.<br>
<br>
I hope this helps. Please feel free to contact me if
there are questions, or we can be of any assistance. <br>
<br>
- Brit<br>
<br>
<br>
</span></font><o:p></o:p></p>
<pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>-- <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Brit O'Neill<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Hardware Maintenance<o:p></o:p></span></font></pre><pre><st1:place
w:st="on"><st1:PlaceName w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>PASSCAL</span></font></st1:PlaceName> <st1:PlaceName
w:st="on">Instrument</st1:PlaceName> <st1:PlaceType w:st="on">Center</st1:PlaceType></st1:place><o:p></o:p></pre><pre><st1:Street
w:st="on"><st1:address w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>100 East Rd.</span></font></st1:address></st1:Street><o:p></o:p></pre><pre><st1:place
w:st="on"><st1:City w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>Socorro</span></font></st1:City>, <st1:State w:st="on">NM</st1:State> <st1:PostalCode
w:st="on">87801</st1:PostalCode></st1:place><o:p></o:p></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Tel: 575-835-5080<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Fax: 575-835-5079<o:p></o:p></span></font></pre>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
On 7/15/11 9:18 AM, Bruce Beaudoin wrote: <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>I'm just sending this to managers at this point.
Please review and if this is indeed a problem for us (and I'm suspecting that
it is) then can Brit or MikeF be prepared to discuss at Monday morning meeting.<br>
<br>
Thanks, Bruce<br>
<br>
-------- Original Message -------- <o:p></o:p></span></font></p>
<table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0>
<tr>
<td nowrap valign=top style='padding:0in 0in 0in 0in'>
<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>Subject: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Fwd: [ANSS-netops] Fwd: bug in Reftek "Model
16X" Garmin GPS receiver (details from Reftek)<o:p></o:p></span></font></p>
</td>
</tr>
<tr>
<td nowrap valign=top style='padding:0in 0in 0in 0in'>
<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>Date: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Thu, 14 Jul 2011 16:04:11 -0600<o:p></o:p></span></font></p>
</td>
</tr>
<tr>
<td nowrap valign=top style='padding:0in 0in 0in 0in'>
<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>From: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Kent Anderson <a href="mailto:kent@iris.edu"
moz-do-not-send=true><kent@iris.edu></a><o:p></o:p></span></font></p>
</td>
</tr>
<tr>
<td nowrap valign=top style='padding:0in 0in 0in 0in'>
<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>To: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>James Gridley <a href="mailto:James.Gridley@iris.edu"
moz-do-not-send=true><James.Gridley@iris.edu></a>, Bruce Beaudoin <a
href="mailto:bruce@passcal.nmt.edu" moz-do-not-send=true><bruce@passcal.nmt.edu></a><o:p></o:p></span></font></p>
</td>
</tr>
<tr>
<td nowrap valign=top style='padding:0in 0in 0in 0in'>
<p class=MsoNormal align=right style='text-align:right'><b><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;font-weight:
bold'>CC: <o:p></o:p></span></font></b></p>
</td>
<td style='padding:0in 0in 0in 0in'>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Bob Woodward <a href="mailto:woodward@iris.edu"
moz-do-not-send=true><woodward@iris.edu></a>, Robert Busby <a
href="mailto:busby@iris.edu" moz-do-not-send=true><busby@iris.edu></a><o:p></o:p></span></font></p>
</td>
</tr>
</table>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
Hi Guys, <o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Not sure if you were aware of this, but looks like
there is a problem with the Garmin GPS (model 16x). I believe these are
the units we bought to overcome the problems with the previous SiRF problems in
08.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Just wanted to make sure you were in the loop on this.
I'm sure you guys are all over this already.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><st1:country-region w:st="on"><st1:place w:st="on"><font
size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>Kent</span></font></st1:place></st1:country-region><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Begin forwarded message:<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><b><font size=4 color=black face=Helvetica><span
style='font-size:13.5pt;font-family:Helvetica;font-weight:bold'>From: </span></font></b><font
size=4 face=Helvetica><span style='font-size:13.5pt;font-family:Helvetica'>"David
S. Croker" <<a href="mailto:croker@usgs.gov" moz-do-not-send=true>croker@usgs.gov</a>></span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><font size=4 color=black face=Helvetica><span
style='font-size:13.5pt;font-family:Helvetica;font-weight:bold'>Date: </span></font></b><font
size=4 face=Helvetica><span style='font-size:13.5pt;font-family:Helvetica'>July
14, 2011 3:52:33 PM MDT</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><font size=4 color=black face=Helvetica><span
style='font-size:13.5pt;font-family:Helvetica;font-weight:bold'>To: </span></font></b><font
size=4 face=Helvetica><span style='font-size:13.5pt;font-family:Helvetica'><a
href="mailto:anss-netops@geohazards.usgs.gov" moz-do-not-send=true>anss-netops@geohazards.usgs.gov</a></span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><b><font size=4 color=black face=Helvetica><span
style='font-size:13.5pt;font-family:Helvetica;font-weight:bold'>Subject:
[ANSS-netops] Fwd: bug in Reftek "Model 16X" Garmin GPS receiver
(details from Reftek)</span></font></b><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>All, below is an exchange we had after trying to work
out a timing error with a couple of Jim Cullen's sites. Sorry for the bad
news....<br>
<br>
Dave<br>
<br>
<br>
<br>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Below are the details about a Reftek timing bug, as
related by Ian Billings at Reftek.<br>
<br>
Refteks running with Model 16X GPS may or may not have a 1 second timing error.
Once they DO have the timing error, it will remain 1 second wrong until the GPS
firmware is updated. So even if we figure out which stations have the bad
GPS module, we might not know if/when the timestamp went bad...<br>
<br>
The only way to tell if you have a Model 16X is to look at the hockey puck.<br>
<br>
<st1:City w:st="on"><st1:place w:st="on">Lynn</st1:place></st1:City><br>
<br>
<br>
<br>
<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>Subject: RE: bug in
"Model 16X" GPS receiver (Garmin)? [USGS]<br>
Date: Thu, 14 Jul 2011 14:49:25 -0500<br>
From: "Ian Billings" <<a href="mailto:I.Billings@reftek.com"
moz-do-not-send=true>I.Billings@reftek.com</a>><br>
To: "Lynn Dietz" <<a href="mailto:dietz@usgs.gov"
moz-do-not-send=true>dietz@usgs.gov</a>><br>
<br>
</span></font><font size=2><span style='font-size:10.0pt'>Hi Lynn,<br>
</span></font> <br>
<font size=2><span style='font-size:10.0pt'>Yes there is a problem with Garmin
modules 16X, their Garmin firmware between 2.50 & 3.70. Garmin have
recently fixed this and we have tested it and ok'd it. The fixed version
is 3.70. <br>
</span></font> <br>
<font size=2><span style='font-size:10.0pt'>Unfortuantely REF TEK did not track
130-GPS serial number to Garmin model number, therefore one will need to look
at the bottom of the unit to know if it is a 16X. This was a major error
on REF TEK's part as there is no way now for support to contact users that
maybe effected.<br>
</span></font> <br>
<font size=2><span style='font-size:10.0pt'>The error is an exact 1sec
difference. Once a clock gets into the state of being in error it will
not come out of it until the firmware is replaced. However it can take
units months to get to this point which makes it difficult to determine if
current units installed are in error yet.<br>
</span></font> <br>
<font size=2><span style='font-size:10.0pt'>The 3.70 firmware is available on
the Garmin web site. I have also attached a diagram of the cable we use
to upgrade the units. You will see that a serial port is needed. I
will be in your area on the 28th of this month so we could discuss this more
then and I could also upgrade any units you have on hand.<br>
</span></font> <br>
<font size=2><span style='font-size:10.0pt'>Let me know if you have ant
additional questions.<br>
</span></font> <br>
<font size=2><span style='font-size:10.0pt'>Ian Billings.<br>
</span></font> <br>
<o:p></o:p></p>
<div class=MsoNormal align=center style='text-align:center'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center>
</span></font></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><font size=2 color=black
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Lynn
Dietz [ <a href="mailto:dietz@usgs.gov" moz-do-not-send=true eudora=autourl>mailto:dietz@usgs.gov</a>
]<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thu 7/14/2011 1:58 PM<br>
<b><span style='font-weight:bold'>To:</span></b> Ian Billings<br>
<b><span style='font-weight:bold'>Cc:</span></b> <a href="mailto:oppen@usgs.gov"
moz-do-not-send=true>oppen@usgs.gov</a>; <a href="mailto:dietz@usgs.gov"
moz-do-not-send=true>dietz@usgs.gov</a>; <a href="mailto:croker@usgs.gov"
moz-do-not-send=true>croker@usgs.gov</a><br>
<b><span style='font-weight:bold'>Subject:</span></b> bug in "Model
16X" GPS receiver (Garmin)?<br>
</span></font><br>
<font size=2><span style='font-size:10.0pt'>Hi Ian,<br>
<br>
Jim Cullen of PG&E just told me that Reftek has confirmed that<br>
there's a bug in the "Model 16X" GPS unit (black hockey puck from<br>
Garmin). Can you give me any details about the timing errors that<br>
result from this bug?<br>
<br>
I have observed a timing difference of approximately 1 sec between<br>
co-located Reftek130 and analog data from the PG&E network, but Jim<br>
says he's observed differences of 0.8 sec. So it appears that the<br>
timing error is not exactly a whole second.<br>
<br>
I'm not sure if NCSN is using any "Model 16X" GPS units, but I know<br>
we have some black hockey pucks out there. Is there a way to tell<br>
from SOH logs if a Reftek130 is using a buggy Garmin?<br>
<br>
Thanks,<br>
Lynn Dietz<br>
<br>
</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'><x-sigsep>__________________________________________________________<br>
USGS - <st1:place w:st="on"><st1:PlaceName w:st="on">Earthquake</st1:PlaceName>
<st1:PlaceName w:st="on">Science</st1:PlaceName> <st1:PlaceType w:st="on">Center</st1:PlaceType></st1:place>
- NCSN Field Operations Manager<br>
David S.
Croker
office (650) 329-4697<br>
<st1:place w:st="on"><st1:City w:st="on">345</st1:City> Middlefield Rd, <st1:State
w:st="on">MS</st1:State></st1:place>
977
fax (650) 329-4732<br>
<st1:place w:st="on"><st1:City w:st="on">Menlo Park</st1:City>, <st1:State
w:st="on">CA</st1:State> <st1:PostalCode w:st="on">94025</st1:PostalCode></st1:place>
cell (650) 465-4334<br>
email: <a href="mailto:croker@usgs.gov" moz-do-not-send=true>croker@usgs.gov</a><br>
Quake info: <a href="http://earthquake.usgs.gov/" moz-do-not-send=true
eudora=autourl>http://earthquake.usgs.gov/<br>
</a>USGS URL: <a href="http://www.usgs.gov/" moz-do-not-send=true
eudora=autourl>http://www.usgs.gov/</a> <o:p></o:p></span></font></p>
</div>
</div>
</div>
</x-sigsep><pre wrap=""><fieldset class="mimeAttachmentHeader"></fieldset><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Managers mailing list<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="mailto:Managers@passcal.nmt.edu" moz-do-not-send=true>Managers@passcal.nmt.edu</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="https://webmail.passcal.nmt.edu/mailman/listinfo/managers"
moz-do-not-send=true>https://webmail.passcal.nmt.edu/mailman/listinfo/managers</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>-- <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Brit O'Neill<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><st1:place
w:st="on"><st1:PlaceName w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>PASSCAL</span></font></st1:PlaceName> <st1:PlaceName
w:st="on">Instrument</st1:PlaceName> <st1:PlaceType w:st="on">Center</st1:PlaceType></st1:place><o:p></o:p></pre><pre><st1:Street
w:st="on"><st1:address w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>100 East Rd.</span></font></st1:address></st1:Street><o:p></o:p></pre><pre><st1:place
w:st="on"><st1:City w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>Socorro</span></font></st1:City>, <st1:State w:st="on">NM</st1:State> <st1:PostalCode
w:st="on">87801</st1:PostalCode></st1:place><o:p></o:p></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Tel: 575-835-5080<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Fax: 575-835-5079<o:p></o:p></span></font></pre><pre
wrap=""><fieldset class="mimeAttachmentHeader"></fieldset><font size=2
color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Managers mailing list<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="mailto:Managers@passcal.nmt.edu" moz-do-not-send=true>Managers@passcal.nmt.edu</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="https://webmail.passcal.nmt.edu/mailman/listinfo/managers"
moz-do-not-send=true>https://webmail.passcal.nmt.edu/mailman/listinfo/managers</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
<pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>-- <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Brit O'Neill<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><st1:place
w:st="on"><st1:PlaceName w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>PASSCAL</span></font></st1:PlaceName> <st1:PlaceName
w:st="on">Instrument</st1:PlaceName> <st1:PlaceType w:st="on">Center</st1:PlaceType></st1:place><o:p></o:p></pre><pre><st1:Street
w:st="on"><st1:address w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>100 East Rd.</span></font></st1:address></st1:Street><o:p></o:p></pre><pre><st1:place
w:st="on"><st1:City w:st="on"><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>Socorro</span></font></st1:City>, <st1:State w:st="on">NM</st1:State> <st1:PostalCode
w:st="on">87801</st1:PostalCode></st1:place><o:p></o:p></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Tel: 575-835-5080<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Fax: 575-835-5079<o:p></o:p></span></font></pre></div>
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