Grs 77 Attitude, Heading, And Reference Unit (Ahrs); Gmu 44 Magnetometer - Garmin CIRRUS PERSPECTIVE SR20 Line Maintenance Manual

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2.8 GRS 77 ATTITUDE, HEADING, AND REFERENCE UNIT (AHRS)
The Garmin GRS 77 is an attitude and heading reference systems (AHRS) that provides aircraft
attitude (roll, pitch, and heading), angular rate, and acceleration information to the GIAs, and
GDU 1240A LRUs.
2.9 GMU 44 MAGNETOMETER
The GMU 44 is a three‐axis magnetometer providing the following:
• Measurement of three axes of magnetic field strength.
• Measurement of two axes of tilt.
• Measurement of GMU44 internal temperature.
• Output of the above information in digital form to the GRS 77 through RS‐485.
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Rev. E
Figure 2‐9. GRS 77 AHRS Unit
Figure 2‐10. GMU 44 Magnetometer
Cirrus Perspective™ Line Maintenance Manual
190-00920-00