Specifications
12 Z-Family Techncial Reference Manual
Chain mode, all commands entered in one serial port are passed back out through
another serial port. The commands are not interpreted by the GPS receiver. The
command $PASHS,DSY enables the Daisy Chain mode and allows the user to assign
which serial ports to be used. A typical example of the use of Daisy Chain mode is
communicating with a radio through a handheld. The radio and handheld are not
directly connected but are both connected to the GPS receiver via separate serial
ports. By enabling the Daisy Chain mode between the two serial ports used by the
handheld and radio, the handheld can communicate with the radio through the GPS
receiver. Refer to “DSY: Daisy Chain” on page 81.
Point Positioning
The Point Positioning option improves the accuracy of a stand-alone absolute position
of a stationary receiver from about 50 meters to less than five meters over a period of
four hours, and can typically get down to a couple meters level after ten hours. Point
positioning uses an averaging technique to reduce the effects of Selective Availability
(SA) and other fluctuating errors. Point positioning mode can be set using the
$PASHS,PPO command. Refer to Chapter 6, Command/Response Formats for
more details about this command. The Point Positioning receiver option [T] must be
set in the receiver for this command to work.
Remote Monitoring
Remote monitoring allows a user to control a remotely located receiver through a PC
and a modem link. You can then:
• monitor operational status
• configure receiver parameter settings
• download data
This function is useful in situations where a receiver is operating in a difficult to
access location.
The receiver must have the Remote Monitor [M] option enabled. Use the
REMOTE.exe software to perform remote monitoring.
Event Marker
When the Event Marker [E] option is installed, the receiver can measure and record
event times with high accuracy. In order to store an event time in the receiver’s
memory, a trigger signal must be applied to the appropriate connector located on the