Auto Pan - With Auto Pan on, when the machine nearly reaches the edge of the screen, the map is moved and redrawn so the machine is near the opposite edge of the screen and heading toward the center.
Base Station - A base station that includes a GPS receiver and data radio must be set up with the AccuGrade System. This station transmits CMR messages to the machine in order to improve position accuracy.
CMR: Compact Measurement Record - A satellite measurement message that is broadcast by the base receiver. The RTK GPS receivers use CMR in order to calculate an accurate vector from the base to the rover.
Cross Slope - The average grade or slope of a parcel or area expressed as a percentage of vertical difference in elevation to the horizontal distance. The cross slope is considered to be in the direction perpendicular to the main direction of the area. A level surface has a cross slope of zero.
Data Card - The plug-in, removable storage card which holds all of the design and system files.
DGPS - Differential Global Positioning System - A technique that uses GPS satellite technology and radio telemetry in order to calculate a a position with improved accuracy over an autonomous position. SBAS is one type of DGPS solution.
Dialog - A screen where you enter text or numbers, or select options.
Firmware - Software that is stored in read-only memory (ROM) or programmable ROM (PROM). Firmware runs the AccuGrade System.
GPS: Global Positioning System - A technique that uses satellite technology in order to calculate an accurate three-dimensional position.
Heading - The direction in which the machine is moving.
LED: Light Emitting Diode - A small, bright, and usually colored light that is used in electronic components.
Load - To put data onto a data card so that the data card can be used or to copy data into the Display from the data card.
Orientation - The direction the drum is facing.
Pan - To pan is to move around the screen at the same scale. Pan moves the plan sideways or up and down on the screen.
Position Dilution of Precision - A measure of quality of the GPS position. PDOP values below seven are satisfactory. The ideal PDOP value is one. Values from two to four are generally satisfactory.
RTK: Real-Time Kinematic - The term "real-time" literally means to be performed immediately, not at a later time. The term "kinematic" literally means to move around. Corrections for positions are obtained in "real time" in the GPS receiver.
Reference Station - See base station.
Rotation - As used in the AccuGrade system, a feature that, when turned on, always orients the design and machine so that the forward direction of the machine is looking up on the Display. With Rotation turned off, the direction of North is always looking up on the Display.
Rover - The GPS receiver on the machine. A single reference or base station can support an unlimited number of rovers.
SBAS: Satellite-based Augmentaion System - A system that provides differential corrections via satellite to ground-based receivers. These systems include WAAS in North America, EGNOS in Europe, and MCAS in Japan. SBAS positions may be accurate to approximately 2 m (6.6 ft) to 3 m (9.8 ft).
Side Slope - The average grade or slope of ground expressed as a percentage, normally used in order to describe a cut or fill slope from the edge of a road to the natural ground surface. A vertical surface has a side slope of zero.
Slope - The forward and aft grade (or mainfall) of the machine.
Soft Key Labels - Graphical screen keys associated with physical front panel soft (software) keys. The operation performed by the soft key label varies depending on the current screen. A soft key label on the screen is controlled by the soft key that is immediately to the right of the soft key label on the front panel. Press the hard key in order to activate the soft key.
Zoom In - Shows a smaller area of the graphical display in more detail.
Zoom Out - Shows a larger area of the graphical display in less detail.
Zoom All - Shows the full area at the maximum size that will fit on the screen.