Table of Contents
Advertisement
SMART2 Operation
Changes in tire pressure over time can potentially cause errors in Terrain Com-
pensation. This is because the height of vehicle can vary with tire pressure.
Leveling the Terrain Compensation Sensor
The vehicle must be parked on flat ground when the level command is sent to the
SMART Antenna.
Zeroing the Terrain Compensation sensor while moving will negatively impact per-
formance. Always ensure the vehicle is stationary before zeroing the sensor.
A known level surface, such as a concrete floor of a shed or workshop, is an ideal loc-
ation to perform the leveling. GNSS visibility is not required.
To level the Terrain Compensation sensor, enter the following command:
TILTZERO ZERO
For more information, refer to the TILTZERO command.
Saving the Terrain Compensation Configuration
After the height has been set or the Terrain Compensation sensor has leveled, the Terrain Com-
pensation configuration must be saved. This is done so the height data and level setting are
saved between power cycles. To save Terrain Compensation configuration, enter the following
command:
TILTZERO SAVE
For more information, refer to the TILTZERO command.
3.6.2 Configuring Terrain Compensation using NMEA Command
Terrain Compensation can also be configured using the NMEA style command, $PMDT com-
mand.
Using the $PMDT command is an alternative to using the TILTFILTER and TILTZERO
commands. Either method will successfully configure the Terrain Compensation feature.
Setting the SMART Antenna Height
The height measurement should be made while the vehicle has the correct tire pressure and is
parked on a hard-packed and level surface. The measurement should be made from the ground
to the bottom of the SMART Antenna connector. The measurement accuracy should be within 1
to 2 inches (2.5 to 5.0 cm).
After the measurement has been made (in feet and inches, or metres), use the $PMDT com-
mand to set the height of the SMART Antenna.
To set the height in feet and inches, enter the following command:
$PMDT,u,,x,y*hh
Where:
SMART2 Installation and Operation Manual 1
31
Advertisement
Table of Contents
