5 The Main Menu
76 IDA-3106 Narda
5.2.8 Calibrating the internal compass
Main Menu • Settings • Service Menu
This function is used to calibrate the compass built in to the IDA Basic Unit.
This compass is only used for orientation and aligning the maps displayed
on the instrument. The calibration routine reduces any distortion of the
earth’s magnetic field due to ferrous metals inside the instrument.
Calibration is only needed if there is a significant difference between the
indicated and actual North pole. Calibration must be performed outdoors
and away from any metallic objects.
NOTE: Newer versions of IDA only have a compass built in to the antenna handle,
not in the Basic Unit itself, so these Basic Units do not require calibration.
All the compass functions are available but the orientation and alignment of
the map displayed on the Basic Unit.
To calibrate the compass:
1. Press the Calibrate Int. Compass softkey.
Instructions for calibration are displayed on the screen.
2. Follow the instructions for calibration.
Battery Voltage Actual battery voltage
Battery Capacity Remaining battery capacity
Buffer Battery Voltage Internal system battery voltage
Free Memory Free memory space in megabytes, absolute
Free Memory in Percent Free memory space in percent, relative
Device Calibration OK Indicates if a valid device calibration has been made
Operating Hours Counter Number of hours of operation so far
GPS module detected Indicates that the internal GPS module is working
properly.
Detected GPS Chipset Indicates the GPS chipset used
Table 15: Description of Device Diagnostics list
Information Description
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