Miscompare Annunciations - Garmin G500H Pilot's Manual

2.8.6

Miscompare Annunciations

Miscompare annunciations are capable of being displayed on the PFD if the
miscompare Monitor is enabled during the installation configuration.
Messages will appear in the MFD alerts window if monitors are enabled and
required data is not present.
A miscompare condition is triggered if the difference between the data
reported by GDU 1 and GDU 2 exceeds the threshold described in the following
table for at least one second:
Parameter
Altitude
Indicated Airspeed
Indicated Airspeed
Indicated Airspeed
Pitch
Roll
A "MISCOMP" annunciation is displayed on the airspeed tape if a miscompare
condition exists for indicated airspeed. A "MISCOMP" annunciation is displayed
on the altitude tape if a miscompare condition exists for altitude. A "PITCH
MISCOMP" annunciation is displayed over the pitch ladder if a miscompare
condition exists for pitch and not roll. A "ROLL MISCOMP" annunciation is
displayed over the pitch ladder if a miscompare condition exists for roll and
not pitch. An "ATTITUDE MISCOMP" annunciation is displayed over the pitch
ladder if a miscompare condition exists for both pitch and roll.
190-01150-02 Rev. J
Range of Trigger
ALL
Both IAS < 35 kts
Either IAS >= 35 kts
Either IAS >= 80 kts
ALL
ALL
Table 2-2 Miscompare Conditions
Garmin G500H Pilot's Guide
Threshold
200 ft
Inhibited
10 kts
7 kts
5 degrees
6 degrees
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