Maxim 2741
"Michael Golan" <[email protected]> Wed, 13 Aug 2008 04:22:31 +0300
| Newsgroups | gmane.comp.hardware.gps.opensource |
|---|---|
| Message-ID | <000001c8fce3$0f1131e0$05000100@mghome> |
This is a multi-part message in MIME format.
--===============2143906590806047195==
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_0001_01C8FCFC.345E69E0"
This is a multi-part message in MIME format.
------=_NextPart_000_0001_01C8FCFC.345E69E0
Content-Type: text/plain;
charset="us-ascii"
Content-Transfer-Encoding: 7bit
Hi All,
I'm certain this is no news to you:
http://www.maxim-ic.com/products/wireless/gps/max2741.cfm
The MAX2741 L1-band GPS receiver IC .This dual-conversion receiver
downconverts the 1575.42MHz GPS signal to a 37.38MHz first IF, and then a
3.78MHz second IF. An integrated 2- or 3-bit ADC (1- bit SIGN, 1- or 2-bit
MAG selectable) samples the second IF and outputs the digitized signals to
the baseband processor.
If I understand correctly, this could be an ideal basis for a USB "dongle"
GPS unit which, with osGPS, will provide a unique solution.
I'm wondering if anyone has looked into modifying the software to use this
unit?
I'm specifically interested in running osGPS in a special application
(aerobatic aircraft) where 10G or more acceleration generally cause all
civilian GPS units to lose tracking. the application is used for pilot
feedback, not anything that is mission-critical.
At this point, I'm only vaguely familiar with GPS internals, but I believe I
can learn the math involved and modify osGPS to feet my special needs
(shortening PLL loops to track under high G?) if I have a practical
hardware/software solution (on board computer must be Ultra-mobile PC, no
moving parts, no PCI card)
Many thanks
Michael Golan
------=_NextPart_000_0001_01C8FCFC.345E69E0
Content-Type: text/html;
charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
<html xmlns:o=3D"urn:schemas-microsoft-com:office:office" =
xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
xmlns=3D"http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=3DContent-Type content=3D"text/html; =
charset=3Dus-ascii">
<meta name=3DGenerator content=3D"Microsoft Word 11 (filtered medium)">
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
text-align:right;
direction:rtl;
unicode-bidi:embed;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:Arial;
color:windowtext;}
@page Section1
{size:595.3pt 841.9pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=3DEN-US link=3Dblue vlink=3Dpurple>
<div class=3DSection1 dir=3DRTL>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>Hi
All,<o:p></o:p></span></font></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>I'm
certain this is no news to you:<o:p></o:p></span></font></p>
<div style=3D'border:none;border-bottom:solid windowtext =
1.0pt;padding:0cm 0cm 1.0pt 0cm'>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></fo=
nt></p>
</div>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></fo=
nt></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><a
href=3D"http://www.maxim-ic.com/products/wireless/gps/max2741.cfm">http:/=
/www.maxim-ic.com/products/wireless/gps/max2741.cfm</a><o:p></o:p></span>=
</font></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></fo=
nt></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt'>The
MAX2741 L1-band GPS receiver IC …This dual-conversion receiver
downconverts the 1575.42MHz GPS signal to a 37.38MHz first IF, and then =
a
3.78MHz second IF. An integrated 2- or 3-bit ADC (1- bit SIGN, 1- or =
2-bit MAG
selectable) samples the second IF and outputs the digitized signals to =
the
baseband processor.<o:p></o:p></span></font></p>
<div style=3D'border:none;border-bottom:solid windowtext =
1.0pt;padding:0cm 0cm 1.0pt 0cm'>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D3 face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></fo=
nt></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>If
I understand correctly, this could be an ideal basis for a USB
"dongle" GPS unit which, with osGPS, will provide a unique =
solution.<o:p></o:p></span></font></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></fo=
nt></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>I'm
wondering if anyone has looked into modifying the software to use this =
unit?<o:p></o:p></span></font></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></fo=
nt></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>I'm
specifically interested in running osGPS in a special application =
(aerobatic
aircraft) where 10G or more acceleration generally cause all civilian =
GPS units
to lose tracking… the application is used for pilot feedback, not
anything that is mission-critical.<o:p></o:p></span></font></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></fo=
nt></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>At
this point, I'm only vaguely familiar with GPS internals, but I believe =
I can
learn the math involved and modify osGPS to feet my special needs =
(shortening
PLL loops to track under high G?) if I have a practical =
hardware/software
solution (on board computer must be Ultra-mobile PC, no moving parts, no =
PCI
card)<o:p></o:p></span></font></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></fo=
nt></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>Many
thanks<o:p></o:p></span></font></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'>
Michael Golan<o:p></o:p></span></font></p>
<p class=3DMsoNormal dir=3DLTR =
style=3D'text-align:left;direction:ltr;unicode-bidi:
embed'><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt;font-family:Arial'><o:p> </o:p></span></fo=
nt></p>
</div>
</body>
</html>
------=_NextPart_000_0001_01C8FCFC.345E69E0--
--===============2143906590806047195==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
opensource_gps mailing list
[email protected]
http://lists.psas.pdx.edu/cgi-bin/mailman/listinfo/opensource_gps
--===============2143906590806047195==--