View source for HIP:differential-gps

From poweroff:
Open SD card slot and make sure that blank card is inserted.
Connect survey antenna to antenna port, directly below the SD slot
Power on
Close out the time dialogue
Hit the DGPS configuration button and make sure that the GPS is in SBAS mode
hit the GPS status icon on the desktop.
Position the antenna so the mounting post is perpendicular to the ground and wait for the "fix not available" message to change to DGPS.  Position should now ready your position, accurate to at least 2 meters.
In order to perform more complex operations the GPS is equipped with the arcpad software.  To access this software minimize the GPS status window by clicking on its tab in the status bar.
Next click on the Arcpad 7.0.1 icon on the desktop.
Select the world map.
To start mapping click on the icon of the satellite with the cross-hairs to the lower right of it.
Click yes in the resulting dialogue box
Ignore the error about the GPS data being too fast for arcpad, it is a known issue
Now click on the arrow next to the previously mentioned icon.  Click GPS Tracklog.
Arcpad is now capturing data.
To capture GPS raw data for post processing click on the arrow next to the wrench and hammer and choose "Start logging GPS raw data".  Data will be saved to the SD card.