19c2daa00SOllivier Robert<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 29c2daa00SOllivier Robert<html> 39c2daa00SOllivier Robert<head> 49c2daa00SOllivier Robert<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> 59c2daa00SOllivier Robert<meta name="GENERATOR" content="Mozilla/4.01 [en] (Win95; I) [Netscape]"> 69c2daa00SOllivier Robert<title>Austron 2200A/2201A GPS Receivers</title> 79c2daa00SOllivier Robert<link href="scripts/style.css" type="text/css" rel="stylesheet"> 89c2daa00SOllivier Robert</head> 99c2daa00SOllivier Robert<body> 109c2daa00SOllivier Robert<h3>Austron 2200A/2201A GPS Receivers</h3> 119c2daa00SOllivier Robert<p>Author: David L. Mills (mills@udel.edu)<br> 129c2daa00SOllivier Robert Last update: 139c2daa00SOllivier Robert <!-- #BeginDate format:En2m -->11-Sep-2010 05:56<!-- #EndDate --> 149c2daa00SOllivier Robert UTC</p> 159c2daa00SOllivier Robert<hr> 169c2daa00SOllivier Robert<h4>Synopsis</h4> 179c2daa00SOllivier Robert<p>Address: 127.127.10.<i>u</i><br> 189c2daa00SOllivier Robert Reference ID: <tt>GPS</tt><br> 199c2daa00SOllivier Robert Driver ID: <tt>GPS_AS2201</tt><br> 209c2daa00SOllivier Robert Serial Port: <tt>/dev/gps<i>u</i></tt>; 9600 baud, 8-bits, no parity<br> 219c2daa00SOllivier Robert Features: <tt>tty_clk</tt></p> 229c2daa00SOllivier Robert<h4>Description</h4> 239c2daa00SOllivier Robert<p>This driver supports the Austron 2200A/2201A GPS/LORAN Synchronized Clock and Timing Receiver connected via a serial port. It supports several special features of the clock, including the Input Buffer Module, Output Buffer Module, IRIG-B Interface Module and LORAN Assist Module. It requires the RS232 Buffered Serial Interface module for communication with the driver.</p> 249c2daa00SOllivier Robert<p>For use with a single computer, the receiver can be connected directly to the receiver. For use with multiple computers, one of them is connected directly to the receiver and generates the polling messages. The other computers just listen to the receiver output directly or through a buffer amplifier. For computers that just listen, <tt>fudge flag2</tt> must be set and the <tt>ppsclock </tt>streams module configured on each of them.</p> 259c2daa00SOllivier Robert<p>This receiver is capable of a comprehensive and large volume of statistics and operational data. The specific data collection commands and attributes are embedded in the driver source code; however, the collection process can be enabled or disabled using the flag4 flag. If set, collection is enabled; if not, which is the default, it is disabled. A comprehensive suite of data reduction and summary scripts is in the ./scripts/stats directory</p> 269c2daa00SOllivier Robertof the ntp3 distribution. 279c2daa00SOllivier Robert<h4>Monitor Data</h4> 289c2daa00SOllivier Robert<p>When enabled by the <tt>flag4</tt> fudge flag, every received timecode is written as-is to the <tt>clockstats</tt> file.</p> 299c2daa00SOllivier Robert<h4>Fudge Factors</h4> 309c2daa00SOllivier Robert<dl> 319c2daa00SOllivier Robert <dt><tt>time1 <i>time</i></tt></dt> 329c2daa00SOllivier Robert <dd>Specifies the time offset calibration factor, in seconds and fraction, with default 0.0.</dd> 339c2daa00SOllivier Robert <dt><tt>time2 <i>time</i></tt></dt> 349c2daa00SOllivier Robert <dd>Not used by this driver.</dd> 359c2daa00SOllivier Robert <dt><tt>stratum <i>number</i></tt></dt> 369c2daa00SOllivier Robert <dd>Specifies the driver stratum, in decimal from 0 to 15, with default 0.</dd> 379c2daa00SOllivier Robert <dt><tt>refid <i>string</i></tt></dt> 389c2daa00SOllivier Robert <dd>Specifies the driver reference identifier, an ASCII string from one to four characters, with default <tt>GPS</tt>.</dd> 399c2daa00SOllivier Robert <dt><tt>flag1 0 | 1</tt></dt> 409c2daa00SOllivier Robert <dd>Not used by this driver.</dd> 419c2daa00SOllivier Robert <dt><tt>flag2 0 | 1</tt></dt> 429c2daa00SOllivier Robert <dd>Set for computers that listen-only.</dd> 439c2daa00SOllivier Robert <dt><tt>flag3 0 | 1</tt></dt> 449c2daa00SOllivier Robert <dd>Not used by this driver.</dd> 459c2daa00SOllivier Robert <dt><tt>flag4 0 | 1</tt></dt> 469c2daa00SOllivier Robert <dd>Enable verbose <tt>clockstats</tt> recording if set.</dd> 479c2daa00SOllivier Robert</dl> 489c2daa00SOllivier Robert<h4>Additional Information</h4> 499c2daa00SOllivier Robert<p><a href="../refclock.html">Reference Clock Drivers</a></p> 509c2daa00SOllivier Robert<hr> 519c2daa00SOllivier Robert<script type="text/javascript" language="javascript" src="scripts/footer.txt"></script> 529c2daa00SOllivier Robert</body> 539c2daa00SOllivier Robert</html> 54