BendixKing KPA 900 System RDR-2000 - Manual (Page 45)

BENDIX/KING® KPA 900
Page 4-3
Revision 2
©Honeywell International Inc. Do not print without express permission of Honeywell.
Dec/2007
4.1.12 AUTO STEP SCAN (ART 2100 ONLY)
When enabled and selected, the Auto Step Scan feature adjusts the tilt by 4 degrees at
the edge of a scan. The Auto Step Scan does a volumetric scan of the airspace ahead of
the aircraft. Auto Step Scan is only available for EFIS systems with certain versions of the
Radar Control Panel.
4.1.13 SECTOR SCAN (ART 2100 ONLY)
When enabled and selected, the Sector Scan feature limits the sweep to a narrower
sector, centered on the track line. Sector Scan permits a faster update rate of a smaller
area of interest. Sector scan is only available for EFIS systems with certain versions of the
Radar Control Panel.
4.1.14 AUTO TILT (ART 2100 ONLY)
The Auto Tilt feature adjusts the antenna tilt to an angle that provides a consistent ground
clutter presentation when range or altitude changes.
4.1.15 TARGET ALERT
When enabled, the Target Alert feature warns the operator of significant weather activity
that is occurring beyond the selected range.
4.2 KRA 405B PARAMETERS
The use of the CM 2000 is optional on a KRA05B. The default parameters are stored in
the KRA 405B and are applied when there is no CM 2000 attached to the system. The CM
Fault is only issued for a reading of a corrupted module, and not for a missing module.
4.2.1 ZERO FOOT OFFSET
The Zero Foot Offset permits the KRA 405B to display zero feet when the aircraft is in a
position higher than it was at the zero foot calibration. The Zero Foot Offset is a constant
value that is subtracted from the measured altitude. Use of a Zero Foot Offset allows an
aircraft with the radar altimeter antennas located ahead of the landing gear to report zero
feet altitude when the gear touches ground. An offset that allows an altitude reading of
less than -20 feet produces a failure.
4.2.2 TRIP POINT #1, TRIP POINT #2, AND TRIP POINT #3
All trip points are used to toggle their states to an external device when a specified altitude
threshold is achieved. There are three independently programmable trip points available.
Each one corresponds to a unique discrete output from the KRA 405B.