COMPARISON MONITOR
Selected pilot and copilot input data are compared in the symbol generator. If the difference between
the data exceeds predetermined levels, the out-of-tolerance symbol will be displayed in amber. A list
of the compared signals and the displayed cautionary symbols is given below. When the compared
pitch and roll attitude or glideslope and localizer signals are out of tolerance, a combined level (ATT
or ILS) will be displayed.
* If the compared heading sources are not the same (both MAG or TRU) the comparison monitor is
disabled. 12° triggering difference if roll attitude is greater than 6°.
** These comparisons are only active during flight director, localizer, and glideslope capture with both
NAV receivers tuned to a LOC frequency.
*** Airspeed and altitude displays will flash for ten seconds and then go steady.
Compared Parameter Annunciation Triggering Difference
1. Pitch Attitude
“PIT” 5°
2. Roll Attitude “ROL” 6°
3. Heading “HDG”* 6°
4. Localizer “LOC”** Approximately dot
5. Glideslope “GS”** Approximately dot
6. Pitch and Roll Attitude “ATT” 5° & 6° respectively
7. Localizer and Glideslope “ILS”** & dot respectively
8. Indicated Airspeed “IAS”*** 5 Knots
9. Altitude “ALT”*** 200 Feet
Cessna Citation XLS - Instrumentation & Avionics
To Next Page