User`s guide

90 Agilent E6474A User’s Guide
4 Use Your System
Once navigation begins using GPS signals, the receiver
automatically calibrates the sensors. During this calibration
process, the vehicle must be maneuvered in a specific manner
in order for the unit to calibrate, as follows:
1 Stop the vehicle for at least three seconds in order to
determine the gyro bias.
2 Drive in a straight line for a distance of approximately one
kilometer (0.62 mile).
3 Turn the vehicle, and proceed in another straight line for
approximately one kilometer (0.62 mile).
The period of time and distance traveled that are required for
the system to calibrate the Dead Reckoning sensors vary
depending on the GPS signal quality and receiver temperature
stability. The calibration continuously refines itself as you
drive.
Phones
Toshiba Direct-Connect Phone Power-up
Toshiba JCDMA phones have special power-up procedures.
Each time you power up the system, you must perform the
following procedure to enable communication between the
phone and the data collection software. Begin all of the
following procedures with the phone and computer powered
off.
Toshiba 1 0-CT
1 Unplug the phone interface cable from the phone.
2 Power the computer on.
3 Power the phone on.
4 Plug the interface cable into the phone.