1132451Sroberto<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2132451Sroberto 3132451Sroberto<html> 4132451Sroberto 5132451Sroberto <head> 6132451Sroberto <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> 7132451Sroberto <meta name="GENERATOR" content="Mozilla/4.01 [en] (Win95; I) [Netscape]"> 8132451Sroberto <title>Magnavox MX4200 GPS Receiver</title> 9182007Sroberto <link href="scripts/style.css" type="text/css" rel="stylesheet"> 10132451Sroberto </head> 11132451Sroberto 12132451Sroberto <body> 13132451Sroberto <h3>Magnavox MX4200 GPS Receiver</h3> 14132451Sroberto <hr> 15132451Sroberto <h4>Synopsis</h4> 16132451Sroberto Address: 127.127.9.<i>u</i><br> 17132451Sroberto Reference ID: <tt>GPS</tt><br> 18132451Sroberto Driver ID: <tt>GPS_MX4200</tt><br> 19132451Sroberto Serial Port: <tt>/dev/gps<i>u</i></tt>; 4800 baud, 8-bits, no parity<br> 20132451Sroberto Features: <tt>ppsclock</tt> (required) 21132451Sroberto <h4>Description</h4> 22132451Sroberto <p>This driver supports the Magnavox MX4200 Navigation Receiver adapted to precision timing applications. It requires the <tt>ppsclock</tt> line discipline or streams module described in the <a href="../ldisc.html">Line Disciplines and Streams Modules</a> page. It also requires a level converter such as described in the <a href="../pps.html">Pulse-per-second (PPS) Signal Interfacing</a> page.</p> 23132451Sroberto <p>This driver supports all compatible receivers such as the 6-channel MX4200, MX4200D, and the 12-channel MX9212, MX9012R, MX9112.</p> 24132451Sroberto <p><a href="http://www.leica-gps.com/"><img src="../pic/9400n.jpg" alt="Leica MX9400N Navigator" height="143" width="180" align="left"></a> <a href="http://www.leica-gps.com/">Leica Geosystems</a> acquired the Magnavox commercial GPS technology business in February of 1994. They now market and support former Magnavox GPS products such as the MX4200 and its successors.</p> 25132451Sroberto <br clear="LEFT"> 26132451Sroberto <p>Leica MX9400N Navigator.</p> 27132451Sroberto <h4>Operating Modes</h4> 28132451Sroberto <p>This driver supports two modes of operation, static and mobile, controlled by clock flag 2.</p> 29132451Sroberto <p>In static mode (the default) the driver assumes that the GPS antenna is in a fixed location. The receiver is initially placed in a "Static, 3D Nav" mode, where latitude, longitude, elevation and time are calculated for a fixed station. An average position is calculated from this data. After 24 hours, the receiver is placed into a "Known Position" mode, initialized with the calculated position, and then solves only for time.</p> 30132451Sroberto <p>In mobile mode, the driver assumes the GPS antenna is mounted on a moving platform such as a car, ship, or aircraft. The receiver is placed in "Dynamic, 3D Nav" mode and solves for position, altitude and time while moving. No position averaging is performed.</p> 31132451Sroberto <h4>Monitor Data</h4> 32132451Sroberto <p>The driver writes each timecode as received to the <tt>clockstats</tt> file. Documentation for the <cite>NMEA-0183</cite> proprietary sentences produced by the MX4200 can be found in <a href="../mx4200data.html">MX4200 Receiver Data Format</a>.</p> 33132451Sroberto <h4>Fudge Factors</h4> 34132451Sroberto <dl> 35132451Sroberto <dt><tt>time1 <i>time</i></tt> 36132451Sroberto <dd>Specifies the time offset calibration factor, in seconds and fraction, with default 0.0. 37132451Sroberto <dt><tt>time2 <i>time</i></tt> 38132451Sroberto <dd>Not used by this driver. 39132451Sroberto <dt><tt>stratum <i>number</i></tt> 40132451Sroberto <dd>Specifies the driver stratum, in decimal from 0 to 15, with default 0. 41132451Sroberto <dt><tt>refid <i>string</i></tt> 42132451Sroberto <dd>Specifies the driver reference identifier, an ASCII string from one to four characters, with default <tt>GPS</tt>. 43132451Sroberto <dt><tt>flag1 0 | 1</tt> 44132451Sroberto <dd>Not used by this driver. 45132451Sroberto <dt><tt>flag2 0 | 1</tt> 46132451Sroberto <dd>Assume GPS receiver is on a mobile platform if set. 47132451Sroberto <dt><tt>flag3 0 | 1</tt> 48132451Sroberto <dd>Not used by this driver. 49132451Sroberto <dt><tt>flag4 0 | 1</tt> 50132451Sroberto <dd>Not used by this driver. 51132451Sroberto </dl> 52132451Sroberto <h4>Additional Information</h4> 53132451Sroberto <p><a href="../refclock.html">Reference Clock Drivers</a> </p> 54132451Sroberto <hr> 55182007Sroberto <script type="text/javascript" language="javascript" src="scripts/footer.txt"></script> 56132451Sroberto </body> 57132451Sroberto 58132451Sroberto</html>
