<div dir="ltr"><div><div><div><br></div>We are mostly just using the omni antennas that came with the ravenX. We have tried directional antennas (yagi) at a couple of sites, but it has not been an obvious improvement. Could be we were doing something wrong, but the rssi never seemed to be that much better than the omnidirectional no matter where we pointed it.<br>
<br></div>I don't know that much about the details to be honest. We install them, turn them on, and except for a weird "first of the month" outage that happens almost every month, the seem to just work. We do have a "prc1000" at the sites to power cycle them once a day. That seemed to help uptime a lot.<br>
<br></div>Philip<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Feb 8, 2013 at 5:36 PM, Mark E. Meremonte <span dir="ltr"><<a href="mailto:meremonte@usgs.gov" target="_blank">meremonte@usgs.gov</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
HI Phillip;<br><br>
Question: are you using dual band Omni and/or directional antennas with
freq capabilities up to 1900-2400MHz to achieve those high rates over
cell?<br><br>
Mark<div><div class="h5"><br><br>
At 03:32 PM 2/8/2013, Philip Crotwell wrote:<br><br>
<blockquote type="cite">Just to be clear, CO ->
steim1 and C2 -> steim2.<br><br>
Why they choose CO/C2 instead of C1/C2 will have to remain a
mystery!<br>
:)<br>
Philip<br><br>
<br>
On Fri, Feb 8, 2013 at 5:29 PM, Philip Crotwell
<<a href="mailto:crotwell@seis.sc.edu" target="_blank">crotwell@seis.sc.edu</a>>
wrote:<br>
<dl><br>
<dd>We have been doing 3 x 100sps from refteks over cell modems with no
data volume problems and accidentally had 6 x 100 sps at one station for
a while. It came in fine with no "over the gigabyte limit"
issues. I think we have 5Gb/month caps as well, on verizon and
AT&T.<br><br>
</dd><dd>Using compression on the refteks helps alot, so use either CO or C2,
but be aware that C2 for a very quiet station can pack more samples into
a reftek packet than will fit into a tracebuf, resulting in the tracebuf
being booted out of the system. For most normal stations this shouldn't
be an issue, and in the cases where it is you can use CO or can set the
gain to x32, or both.<font color="#888888"><br><br>
</font></dd><dd><font color="#888888">Philip<br>
</font></dd><br><br>
<dd>On Fri, Feb 8, 2013 at 5:19 PM, Doug Given
<<a href="mailto:given@caltech.edu" target="_blank">given@caltech.edu</a>>
wrote:<br>
<dl><br>
<dd> Our real-world numbers from 6-channel Q330s (Steim
2 compression) show volumes of about 3.2Gb/mo or less. We have exceeded
the 5Gb/mo limit when there is some pathology at the station that causes
lots of resends. So far our carrier, Verizon, has not dinged us for any
overages.<br><br>
</dd><dd><pre>+-----------------------------------------------------------------+
<dd>| Douglas
Given
| Project
Chief
|
</dd><dd>| U.S. Geological Survey | S. California Earthquake
Monitoring |
</dd><dd>| Caltech Seismological Lab |
<a href="tel:%28626%29583-7812" target="_blank">(626)583-7812</a> FAX:
<a href="tel:%28626%29583-7827" target="_blank">(626)583-7827</a> |
</dd><dd>| 525 So. Wilson Ave. |
<a href="mailto:given@caltech.edu" target="_blank">given@caltech.edu</a> or
<a href="mailto:doug@usgs.gov" target="_blank">doug@usgs.gov</a> |
</dd><dd>| Pasadena, CA 91106 |
<a href="http://earthquake.usgs.gov" target="_blank">http://earthquake.usgs.gov</a>
|
</dd><dd>
+-----------------------------------------------------------------+</dd></pre></dd></dl></dd>
<font face="Courier New, Courier"></font>
<dd>On 2/8/2013 1:53 PM, James H Bollwerk (jbollwrk) wrote:<br>
<blockquote type="cite"><br>
<dd>Just getting into the cell modem game and need help.<br><br>
</dd><dd>We’ll be Streaming 6 x100 sps from a RT130-01/6 with a Raven XE (ATT
provider). <br><br>
</dd><dd>Our university plan will allow 5GB per billing cycle. With
compression that should work.<br><br>
</dd><dd>Does anyone have real world data usage numbers?<br><br>
<br><br>
</dd><dd><pre>_______________________________________________
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*********************************************************<br>
Mark E. Meremonte
Geophysicist Eq_Effects/NEIC<br><br>
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