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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
Page 1-4
006-10536-0010 Rev. 10 Oct/2005
1.3 TECHNICAL CHARACTERISTICS
A. KRA 405B RADAR ALTIMETER SYSTEM
B. KRA 405B RECEIVER/TRANSMITTER TSO
C. KRA 405B RECEIVER/TRANSMITTER
SYSTEM ALTITUDE ACCURACY: ± 5 ft (1.5 m) or ± 5% (whichever is greater)
at 0 to 500 feet and ± 7% at 500 to 2,500 feet
SYSTEM ANTENNA CABLES (2 Required):
Length:
See 1.5 ACCESSORIES REQUIRED BUT NOT SUPPLIED
Cable Type: See TABLE 1-2 CABLE INSTALLATIONS
SYSTEM POWER REQUIREMENTS: 27.5 Vdc ± 20% at 2 Amperes maximum
SYSTEM WEIGHT (less cables): 5.1 lbs (2.31 kg)
TSO COMPLIANCE: C87/ETSO-2C87 (See TSO APPENDIX)
ALTITUDE: 55,000 ft (16,764 m)
OPERATIONAL TEMPERATURE RANGE: -55° C to +70° C
NON TSO’D FUNCTIONS NONE
PHYSICAL CHARACTERISTICS:
Length:
Width:
Height:
See FIGURE 2-6 KRA 405B INSTALLATION DRAWING
WEIGHT: KRA 405B
With Mtg rack (optional)
See FIGURE 2-6 KRA 405B INSTALLATION DRAWING
POWER REQUIREMENTS:
Nominal Current
Maximum Current
27.5 Vdc ± 20% at 850 mA
18 Vdc @ 1.2 Amperes (emergency)
ALTITUDE RANGE:
Tracked: -20 to 2,500 feet (-6.1 to 762.0 m)
ALTITUDE TRIPS (selectable):
Adjustment Range #1, 2, and 3: (Con-
figuration Module
Programmable)
Factory Settings:
0-2500 feet (0-762.00 m)
Trip #1 200 feet (60.90 m)
Trip #2 500 feet (152.40 m)
Trip #3 1200 feet (365.76 m)
ALTITUDE ACCURACY:
066-01153-0101,-0202,-2001/-4001
(All Analog and Digital Altitude Outputs except
066-01153-2001/-4001 Digital Outputs)
3 ft (0.91 m) or ± 3% (whichever is greater)
at 0 to 500 feet and ± 5% at 500 to 2,500 feet
ALTITUDE ACCURACY:
066-01153-2001/-4001
ARINC 429 Outputs Labels 164 and 165
± 2 ft (0.61 m) below 100 feet,
± 3% at 100 feet to 500 feet, and
± 5% at 500 to 2,500 feet
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