Garmin MX20 Installation Manual page 50

Installation
9. The MX20 will flash all faults briefly to indicate calibration mode has been entered. If this fails,
turn power off and on and repeat the procedure.
2.9.9.2.2.1 Calibration of Analog Stabilization Inputs
When in Calibration mode, the MX20 is ready to calibrate the stabilization inputs. Each parameter can be
calibrated as described in the sections below.
The GAIN adjustment is used to select the parameter being calibrated. The TILT adjustment is used to
adjust the parameter's value.
2.9.9.2.2.2 400HZ Reference Gain
1. Set the tilt table to 0 pitch and roll.
2. Use the GAIN + and GAIN – keys to set the GAIN to -28. The AZIMUTH ANGLE field should
also display 01.
3. Use the TILT
UP and 10 UP increases the 400 HZ REF field, while a TILT SETTING between 5 DOWN and 10
DOWN decreases the 400 HZ REF field. Use the TILT keys to set the 400 HZ REF field to 0.0
1.0 . Upon reaching the desired 400 HZ REF setting, quickly set the TILT SETTING to between 5
UP and 5 DOWN to lock in the 400 HZ REF setting.
2.9.9.2.2.3 Pitch Offset
1. Check that the tilt table is set for 0 pitch.
2. Use the GAIN + and GAIN – keys to set the GAIN to between -17.5 and -19.5. The AZIMUTH
ANGLE field should also display 04. Note that the pitch offset value is displayed in the PITCH
ANGLE field.
3. Use the TILT
UP and 10 UP increases the PITCH ANGLE field, while a TILT SETTING between 5 DOWN and
10 DOWN decreases the PITCH ANGLE field. Use the TILT keys to set the PITCH ANGLE field
to 0.0 1.0 . Upon reaching the desired PITCH ANGLE setting, quickly set the TILT SETTING
to between 5 UP and 5 DOWN to lock in the PITCH ANGLE setting.
2.9.9.2.2.4 Roll Offset
1. Check that the tilt table is set for 0 roll.
2. Use the GAIN + and GAIN – keys to set the GAIN to between -14 and -16. The AZIMUTH
ANGLE field should also display 05. Note that the roll offset value is displayed in the ROLL
ANGLE field.
3. Use the TILT
UP and 10 UP increases the ROLL ANGLE field, while a TILT SETTING between 5 DOWN and
10 DOWN decreases the ROLL ANGLE field. Use the TILT keys to set the ROLL ANGLE field
to 0.0 1.0 . Upon reaching the desired ROLL ANGLE setting, quickly set the TILT SETTING to
between 5 UP and 5 DOWN to lock in the ROLL ANGLE setting.
2.9.9.2.2.5 Pitch Gain
1. Set the tilt table for 10 pitch up.
2. Use the GAIN + and GAIN – keys to set the GAIN to between -24.5 and -26.5. The AZIMUTH
ANGLE field should also display 02. Note that the pitch gain value is displayed in the PITCH
ANGLE field.
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and TILT keys to adjust the TILT SETTING. A TILT SETTING between 5
and TILT keys to adjust the TILT SETTING. A TILT SETTING between 5
and TILT keys to adjust the TILT SETTING. A TILT SETTING between 5
560-1025-09 Rev E MX20 Installation Manual