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190-00728-04 Rev. A
Embraer Prodigy
®
Flight Deck 100 Pilot’s Guide
616
APPENDIX A
COMPARATOR ANNUNCIATIONS
The Comparator monitors critical values generated by redundant sensors. If differences in the sensors
exceed a specified amount, this discrepancy will be annunciated in the Comparator Window as a ‘MISCOMP’
(miscompare) as seen in Figure A-1. Note that operating the system in the vicinity of metal buildings or other
metal structures can cause sensor differences that may result in nuisance miscompare annunciations during
start up, shut down, or while taxiing. If one or both of the sensed values are unavailable, it will be annunciated
as a ‘NO COMP’ (no compare). The following is a list of the possible annunciations:
Figure A-1 Sensor Comparator Window
Comparator
Window
Comparator Window Text Condition
ALT MISCOMP
Difference in altitude sensors is > 200 ft.
IAS MISCOMP
If both airspeed sensors detect < 35 kts, this is inhibited.
If either airspeed sensor detects > 35 kts, and the difference in sensors is > 15 kts.
If either airspeed sensor detects > 80 kts, and the difference in sensors is > 10 kts.
HDG MISCOMP
Difference in heading sensors is > 10º.
PIT MISCOMP
Difference in pitch sensors is > 5º.
ROL MISCOMP
Difference in roll sensors is > 6º.
ALT NO COMP
No data from one or both altitude sensors.
IAS NO COMP
No data from one or both airspeed sensors.
HDG NO COMP
No data from one or both heading sensors.
PIT NO COMP
No data from one or both pitch sensors.
ROL NO COMP
No data from one or both roll sensors..