Compass Calibration Sw; User Assisted Calibration; Compass Declination Menu - Nokia NPL-4 Series Manual

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Compass calibration SW

Calibration is needed for compensate external magnetic field and improve performance
of compass reading accuracy.

User assisted calibration

UI SW menu structure
• User select checked horizontal plane with no disturbance near of phone
• With very slow rotating (about 10s / round) MCU SW will find values for compensation
during one round.
• SW calculates calibration values

Compass declination menu

Used for setting compensated declination angle. Declination values is accessible from
special maps or lists of places. Declination angle value varies about ± 25 ° depending geo-
graphical place on earth.
Supply interface for manual calibration, used also for resetting calibration values
Copyright © 2005 Nokia Corporation. All rights reserved.
Issue 2 05/05
System Module and User Interface
NPL-4/5/
Page 59