Trimble Outdoors SPSX51 - Manual (Page 103)

SPSx51 Modular GPS Receivers User Guide 101
Automatically Setting up a Mobile Base Station Using AutoBase Technology 8
Where you set up each time with potentially different antenna heights, Trimble
recommends that on the first setup after AutoBase has completed its process,
that you edit the antenna height (using the receiver keypad and display). The
updated antenna height changes the AutoBase setup, so that on subsequent
setups, when you again change the antenna height, you will get correct height
information during measurement. At the first setup, Trimble recommends that
you change the AutoBase setup and antenna height before you carry out a site
calibration.
8. The receiver begins generating RTK CMR+ corrections.
9. The RTK corrections begin streaming over the internal radio. If there is no
internal radio, the receiver defaults to streaming the corrections on the Lemo
port.
Scenario Two: First visit to a site with AutoBase Warning turned on
The following actions occur when you set up the base station for the first time on a
point, and the AutoBase Warning is turned on:
1. The receiver is powered on.
2. The receiver begins tracking satellites.
3. The receiver determines the current position.
4. The receiver reviews the base positions stored in the receiver.
5. The receiver does not find any base station that corresponds to the current
position.
6. The receiver displays a warning that AutoBase has failed.
7. No RTK corrections are streamed until the base station is set up using the
keypad and display or an SCS900 controller.
Scenario Three: Repeat visit to a site with AutoBase Warning turned off
The following actions occur when you repeat a base station setup on a point, and the
AutoBase Warning is turned off:
1. The receiver is powered on.
2. The receiver begins tracking satellites.
3. The receiver determines the current position.
4. The receiver reviews the base station positions stored in the receiver.
5. The receiver finds a base station position that corresponds to the current
position.
C
CAUTION – If there are two or more base positions within a 50 meter radius of your
current position, the receiver will make the most recently used base position file active.