GNSS Module Series
L26-DR EVB User Guide
L26-DR_EVB_User_Guide 22 / 28
6
Calibration Procedure
In order to utilize Dead Reckoning (DR) capabilities of L26-DR, a valid module calibration is essential.
Please mount the module tightly on the vehicle during use. No movement or shaking should occur to
ensure the performance of the module. This chapter introduces the detailed calibration procedure.
6.1. Calibration for L26-DR (ADR)/L26-DR (ADRA) EVB
L26-DR (ADR) and L26-DR (ADRA) EVB allow for flexible installation without constraint on angle and
direction. The module automatically recognizes the mounting angle deviation and compensates by
algorithmic calculations.
The calibration for L26-DR (ADR) and L26-DR (ADRA) comprises 7 steps, as describe in the following
chapters.
1. This calibration process in this chapter is based on the precondition that users have fixed the EVB.
And no displacement or rotation of the EVB should happen after the calibration.
2. The calibration process needs to be repeated only when:
The EVB has been moved and reinstalled.
During a DR cold start and when the NVM is blank or invalid.
3. Please follow the steps in
Chapter 6.1.1
to finish the angle determination process as any improper
operation may affect the calibration.
6.1.1. Determination Process of EVB Installation Angle
Before the 6-axis accelerometer sensor is available, EVB installation angle needs to be determined by the
following steps:
Step 1:
Install the EVB on a vehicle and connect the antenna.
Step 2:
Start the vehicle and power on the EVB.
Step 3:
Keep the vehicle unmoved for at least 20 seconds on a flat road (1°~2° tolerance in gravity
NOTES
