Trimble Inc. 6248192-B1 사용자 설명서

7     AutoBase Feature

60     SPSx80 Smart GPS Antenna User Guide

The AutoBase feature influences how you set up an SPS880 Extreme

 

Smart GPS 

antenna as a base station. Before the receiver can transmit RTK corrections (that is, 
operate as an RTK base station), the current position of the receiver must correspond 
to a previous base station position. The base station position—latitude, longitude, and 
height—must be part of the GPS site calibration. 

1.

To perform the first base station setup at a new location, always use the SCS900 
Site Controller software to initialize the SPS880 Extreme

 

Smart GPS antenna on 

a new point. You generally do this only once, the first time that you occupy the 
point, but see the Caution below.

 

When the base station setup is complete, the receiver generates and stores an 
application file that contains the parameters for that location. 

C

CAUTION – When you perform a future base station setup at the same location, the 
receiver assumes that there has been no change to either the antenna height or the 
antenna height measurement method used previously. It is therefore essential that you 
keep the antenna height constant between setups. 
If there is any risk that the antenna height might have changed, you must use the SCS900 
Site Controller software to start (and so reset) the SPS880 Extreme

 

Smart GPS antenna. 

From the SCS900 Site Controller software, select Start Base Station.

2.

To perform a future base station setup at the same location, simply press the 

 key on the receiver. The receiver turns on, determines its location, finds 

the appropriate application file, initializes the settings, and starts to broadcast 
RTK CMR+ corrections through the internal radio or through the external radio 
(whichever radio was used the previous time).

If the receiver uses an external radio, such as an SNB900 radio, the AutoBase 
feature raises the Bluetooth

®

 wireless connection to the radio. If a Bluetooth 

connection is not used, the AutoBase feature searches the receiver 
communications ports for the external radio. When the receiver finds the 
external radio, the receiver transmits RTK CMR+ corrections to the radio. 

After each new base station setup, and at the start of every measurement session, 
Trimble recommends that you measure one known point to verify that the position 
and height errors are within tolerance. The measurement takes only a few seconds, but 
can eliminate the gross errors typically associated with daily base station setup.

The selected antenna type determines which options are available for determining the 
antenna height. The AutoBase feature uses an antenna type of “R8 Model 2 /SPS880 
Internal.”