Novatel OEM6, Руководство пользователя

Страница: 53 / 175

Operation OEM6 Cards and Enclosure Chapter 4
OEM6 Family Installation and Operation User Manual Rev 7 53
4.4.4 UAL
The Steadyline mode used depends on the BESTPOS and GPGGA solution types.
When the solution type is OPERATIONAL, the receiver uses the Maintain option.
When the solution type is WARNING, the receiver uses the Transition option. When the receiver changes
from WARNING to OPERATIONAL, it will continue to use the Transition option until any existing offset is
gone.
When the solution type is OUT_OF_BOUNDS, the Steadyline feature is disabled.
The thresholds used to determine the solution type (OPERATIONAL, WARNING or OUT_OF_BOUNDS),
can be specified using the UALCONTROL command. Refer to the
OEM6 Family Firmware Reference
Manual (OM-20000129) for more information.
Figure 4, Steadyline UAL- Warning Limit Example on page 53 and Figure 5, Steadyline UAL - Out of
Bounds Example on page 54 show an examples of Steadyline using the UAL mode.
Figure 4: Steadyline UAL- Warning Limit Example

UAL mode will not function unless UALCONTROL is enabled using the UALCONTROL
command.
A Position type is OPERATIONAL.
Higher accuracy corrections are lost. The receiver changes to a lower accuracy solution.
Steadyline operates in Maintain mode while the solution accuracy remains within the Operational
limit.
B The solution accuracy exceeds the operational limit. The position type changes to WARNING.
The Steadyline mode changes from Maintain to Transition.
C The solution accuracy moves back within the operational limit. The position type changes to
OPERATIONAL.
The Steadyline mode remains in Transition mode.
D The solution offset is removed.
The Steadyline mode changes from Transition to Maintain.
Operational
Limit
Warning
Limit
Operational
Limit
Warning
Limit
A B C D