Chapter 3 SMART7 Operation
SMART7 Installation and Operation User Manual v6
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A known level surface, such as a concrete floor of a shed or workshop, is an ideal location 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 Compensation con-
figuration 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.
3.10.2 Configuring Terrain Compensation using NMEA Command
Terrain Compensation can also be configured using the NMEA style command,
$PMDT
command.
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 meters), use the
$PMDT
command 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:
x = the feet portion of the height measurement
y = the inches portion of the height measurement
hh = NMEA check sum
For example, entering the command
$PMDT,u,,1,1*78
will set the SMART Antenna height to 1 foot and 1 inch.
To set the height in meters, enter the following command:
$PMDT,a,,,,x.x*hh
Where:
x.x = the height measurement in meters
hh = NMEA check sum
For example, entering the command
$PMDT,u,,,,2*66
will set the SMART Antenna height to 2 meters.