<BR>Features: <TT>ppsclock</TT> (required)
<H4>
Description</H4>
-This driver supports the Magnavox MX 4200 Navigation Receiver adapted to
-precision timing applications. It requires the <TT>ppsclock</TT> line discipline
-or streams module described in the <A HREF="ldisc.htm">Line Disciplines
-and Streams Modules</A> page. It also requires a gadget box and 1-PPS level
-converter, such as described in the <A HREF="pps.htm">Pulse-per-second
-(PPS) Signal Interfacing</A> page.
+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.htm">Line
+Disciplines and Streams Modules</A> page. It also requires a <A
+HREF="gadget.htm">gadget box</A> and 1-PPS level converter, such as
+described in the <A HREF="pps.htm">Pulse-per-second (PPS) Signal
+Interfacing</A> page.
<P>This driver supports all compatible receivers such as the 6-channel
-MX 4200, MX 4200D, and the 12-channel MX 9212, MX 9012R, MX 9112.
+MX4200, MX4200D, and the 12-channel MX9212, MX9012R, MX9112.
+
+<P>
+<A HREF="http://www.leica-gps.com/">
+<IMG SRC="pic/9400n.jpg" ALT="Leica MX9400N Navigator" 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>
+
+<BR CLEAR=LEFT>
+Leica MX9400N Navigator.
+
+<P>
+
<H4>
Operating Modes</H4>
This driver supports two modes of operation, static and mobile, controlled
for a fixed station. A DOP-weighted running 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. The position averaging algorithm does not take into account boundary
-conditions, so this mode of operation very near the international date
-line or the poles is not recommended.
+time.
<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,
<H4>
Monitor Data</H4>
The driver writes each timecode as received to the <TT>clockstats</TT>
-file.
+file. Documentation for the <CITE>NMEA-0183</CITE> proprietary
+sentences produced by the MX4200 can be found in
+<A HREF="mx4200data.htm">MX4200 Receiver Data Format</A>.
+
<H4>
Fudge Factors</H4>