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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
REVISION HIGHLIGHTS
006-10536-0010 Rev. 10
Oct/2005
This is a full reprint of the KRA 405B Installation Manual. Discard the previous
manual revision in its entirety. Specific changes to content are denoted by
change bars.
Revision highlight(s) include the updating the environmental qualification forms
to revision AF.
This manual contains information relative to the physical, mechanical, and
electrical characteristics of the BENDIX/KING KRA 405B. Installation and
operating procedures are also included. Information relative to the
maintenance and procurement of replacement parts may be found in the KRA
405B Maintenance Manual Part Number 006-15536-00XX (XX = Highest
Revision).
NOTE:The KRA 405B System consists of four modules: the Radar Altim-
eter (Receiver/Transmitter), the Radar Altimeter Indicator, the
Radar Altimeter Antennas (2 each), and the CM 2000 Configuration
Module (optional). The system is positioned as a replacement
for the KRA 405 Radar Altimeter System.
The preferred configurations utilize the following components:
KRA 405B066-01153-0202ARINC 552A
KRA 405B066-01153-2001/-4001ENHANCED DIGITAL AC-
CURACY
CONTROLLER/DISPLAYKNI 415066-3031-00 5 VOLT BLK
KNI 415066-3031-0128 VOLT BLK
KNI 415066-3031-02 5 VOLT GRY
KNI 415066-3031-0328 VOLT GRY
KNI 415 066-3031-04 28 VOLT BLK NIGHT VI-
SION
KNI 416066-3044-00 5 VOLT BLK
KNI 416066-3044-0128 VOLT BLK
KNI 416066-3044-02 5 VOLT GRY
KNI 416066-3044-0328 VOLT GRY
KNI 416 066-3044-04 28 VOLT BLK NIGHT VI-
Some part numbers may not be currently available. Consult the current
Honeywell catalog or contact a Honeywell representative for equipment
availability. The KRA 405B System also may consist of previously TSO
certified components from the following list. However the use of any
configurations other than the preferred configuration will result in
reduced functionality of the system.
MODELKA 54
DESCRIPTIONRETROFIT ANTENNA
Upon use of the above antennas or any other configurations, the STC
certification will be the sole responsibility of the customer and/or the
installing agent. Please contact a field representative for additional
information.
1.1DESCRIPTION OF EQUIPMENT
N
The KRA 405B Radar Altimeter System provides the pilot with dependable,
accurate AGL (altitude above ground level) information during the approach
phase of a flight. The system has the capability of alerting the pilot
when a predetermined altitude (decision height) is reached. The system
also provides altitude information to the flight control system during the
approach.
The KRA 405B Radar Altimeter (P/N 066-01153-0202), in addition to
providing an ARINC 552A output for Auxiliary Out 2, has the ability to
take a DH input from an EFIS or KNI 415/416 and generate an audio signal
(refer to section 1.3. C. KRA 405B RECEIVER/TRANSMITTER for tone generator
circuit specifications).
The KRA 405B Radar Altimeter (P/N 066-01153-2001/-4001) provides enhanced
accuracy (± 2 feet) below 100 feet using the digital 429 Buss labels 164
and 165.
Both KRA 405B versions P/N 066-01153-0101 and P/N 066-01153-0202 with
software 01/04, 02/04 or higher will not report negative values of
altitude on the ARINC 429 digital bus unless expressly configured to do
so. This feature is required for installations with Honeywell EFIS 40/
50. One of these two unit versions (-0101 or -0202) must be used when
interfacing the digital output of the KRA 405B to equipment which expect
non-negative values.
The KRA 405B determines the altitude above ground level (AGL) by
transmitting a signal to the ground then processing the reflected signal.
The altimeter outputs the altitude information as analog voltages and in
ARINC 429 digital format.
Page 1-2
006-10536-0010 Rev. 10Oct/2005
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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
The KRA 405B Radar Altimeter System consists of the KRA 405B Receiver/
Transmitter, the KNI 415 or KNI 416 Indicator, and two (2) KA 54A Antennas.
The entire system is solid state except for a servo mechanism and relay
in the Indicator.
The KRA 405B Radar Altimeter replaces the KRA 405 altimeter. The KRA 405B
is electrically compatible with the same indicators and antennas as the
KRA 405.
NOTE:The connectors for KRA 405 and KRA 405B are not compatible.
1.2ACRONYMS AND ABBREVIATIONS
ACRONYMMEANING
AGLAbove Ground Level
ARINCAeronautical Radio Incorporated
EUROCAEThe European Organization for Civil Aviation Electronics
FAAFederal Aviation Administration
FCCFederal Communications Commission
FTZFernmeldetechischeszentralamt (German)
HzHertz
IFIntermediate Frequency
kHzkilohertz
GHzGigahertz
MHzMegahertz
PEOPrecision Equipment Output
P/NPart Number
RTCARequirements and Technical Concepts for Aviation
R/TReceiver/Transmitter
TSOTechnical Standing Order
VSWRVoltage Standing Wave Ratio
XXPart numbers ending in XX denotes the highest revision available (Example: 006-
10536-00XX)
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006-10536-0010 Rev. 10Oct/2005
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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
1.3TECHNICAL CHARACTERISTICS
A.KRA 405B RADAR ALTIMETER SYSTEM
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:
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)
B.KRA 405B RECEIVER/TRANSMITTER TSO
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 FUNCTIONSNONE
See 1.5 ACCESSORIES REQUIRED BUT NOT SUPPLIED
C.KRA 405B RECEIVER/TRANSMITTER
PHYSICAL CHARACTERISTICS:
Length:
Width:
Height:
WEIGHT: KRA 405B
With Mtg rack (optional)
POWER REQUIREMENTS:
Nominal Current
Maximum Current
ALTITUDE RANGE:
Tracked:-20 to 2,500 feet (-6.1 to 762.0 m)
ALTITUDE TRIPS (selectable):
Adjustment Range #1, 2, and 3: (Configuration Module
Programmable)
Factory Settings:
ALTITUDE ACCURACY:
066-01153-0101,-0202,-2001/-4001
(All Analog and Digital Altitude Outputs except
066-01153-2001/-4001 Digital Outputs)
ALTITUDE ACCURACY:
066-01153-2001/-4001
ARINC 429 Outputs Labels 164 and 165
See FIGURE 2-6 KRA 405B INSTALLATION DRAWING
See FIGURE 2-6 KRA 405B INSTALLATION DRAWING
27.5 Vdc ± 20% at 850 mA
18 Vdc @ 1.2 Amperes (emergency)
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)
3 ft (0.91 m) or ± 3% (whichever is greater)
at 0 to 500 feet and ± 5% at 500 to 2,500 feet
± 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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006-10536-0010 Rev. 10Oct/2005
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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
C.KRA 405B RECEIVER/TRANSMITTER (cont.)
ALTITUDE OUTPUT:
Slope:
Precision Equipment: -20 to 2,500 ft (-6.1 to 762.0 m) -10 mV/ft (32.81 mV/m); Zero
ft = 0.000 volts
Auxiliary Out #1: -20 to 500 feet (-6.1 to 152.4 m) +20 mV/ft (+65.62 mV/m); 500
to 2,500 feet (152.4 to 762 m) +3 mV/ft (9.84 mV/m); Zero ft
= +0.400 volts
Auxiliary Out #2:
(-0101, -2001/-4001)
Auxiliary Out #2:
(-0202)
Analog Altitude: -20 to 500 feet (-6.1 to 152.4 m) +20 mV/ft (+65.62 mV/m); 500
Arinc 429 Out: Shall meet all ARINC 429 electrical
-20 to 2,500 feet (-6.1 to 762.0 m) -4 mV/ft (13.12 mV/m);
Zero feet = 0.000 volts
-20 to 480 feet (-6.1 to 146.3 m) +20 mV/ft (+65.62 mV/m); 480
to 2,500 feet (146.3 to 762 m) 10 x logn [e(h+20)/500](10 x
logn [e(h+6.1/152.4)]m); Zero ft = +0.400 volts
to 2,500 feet (152.4 to 762 m) +3 mV/ft (9.84 mV/m); Zero ft
= +0.400 volts
specifications.
The following are serial digital outputs from the KRA 405B:
LABELINFORMATION CONTAINED IN LABELFORMATSPEED
164Radio HeightBNRLow Speed
165Radio HeightBCDLow Speed
371GA Equipment CodeBCDLow Speed
377Equipment Identifier WordBCDLow Speed
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006-10536-0010 Rev. 10Oct/2005
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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
C.KRA 405B RECEIVER/TRANSMITTER (cont.)
Load Capability:4 loads, @ 2 kΩ per load
Off Scale Voltage:
Precision Equipment Output:-28.0 ± 1.5 Vdc
Auxiliary Out #1:+17.3 ± 0.5 Vdc
Auxiliary Out #2:-11.2 ± 0.6 Vdc (-0101)
Auxiliary Out #2:27.5 ± 1.5 Vdc (-0202)
Time Constant:
Precision Equipment Output:0.1 second maximum
TRANSMITTER OUTPUT:
Power:160 mW nominal, FMCW
Center Frequency:4300 ± 15 MHz
Modulation Frequency:
Primary:100 Hz nominal
Secondary:105 Hz nominal (in dual installation)
TRANSMITTER OUTPUT: (cont.)
FM Deviation P-P:100 MHz
Type of Service:Continuous
WARNING SYSTEM:
FCS Warn:
Normal Operation:+18 to +32 Vdc at less than 250 mA
Warn Condition:Less than 10 μA
Altimeter Valid:
Normal Operation:+18 to +32 Vdc at less than 250 mA
Warn Condition:Less than 10 μA
Rad_Alt Valid:
Normal Operation:+18 to +32 Vdc at less than 250 mA
Warn Condition:Less than 10 μA
ALTITUDE TRIPS:
Tripped (Locked R/T):+0.5 Vdc maximum at less than 250 mA
Untripped (Unlocked R/T):10 μA maximum at less than +30 Vdc
TONE GENERATOR CIRCUIT:
DH Tone Enable Active Level:Low: < 3.5 Vdc
Inactive Level:High: > 17 Vdc
Tone Active Time:2.5 seconds ± .5 seconds
Output Frequency:587 HZ ± 20 Hz (music tone D)
Output Level (-0202):30mW ± 10 mW into a 500 Ω load
Noise Level:60 dB min below rated level
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006-10536-0010 Rev. 10Oct/2005
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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
D.KNI 415/416 INDICATOR
TSO COMPLIANCE:C87/ETSO-2C87 DO-138
Env. Cat GAPAAAXXXXXX
PHYSICAL DIMENSIONS:See FIGURE 2-5 KNI 415/416 INSTALLATION DRAWING
Length:
Width:
Height:
WEIGHT:See FIGURE 2-5 KNI 415/416 INSTALLATION DRAWING
ALTITUDE:55,000 feet (16,764 m)
OPERATIONAL TEMPERATURE RANGE:-20° C to +70° C
POWER REQUIREMENTS:
Primary Power:27.5 Vdc ± 20% @ 850 mA
Panel Lamp Power: (28 volt units)28 Vdc ± 10% or 26 Vac ± 10% @ 120 mA
Panel Lamp Power: (5 volt units)+5 Vdc ± 10% or 5 Vac ± 10% @ 575 mA
ALTITUDE RANGE DISPLAYED:-20 to 2,000 feet (-6.1 to 609.60 m)
ALTITUDE ACCURACY:
0 to 500 ft: ± 4 feet (1.22 m) or ± 4% (whichever is great-
er)
500 to 2,000 ft:± 5%
DECISION HEIGHT:
Altitude Range:
(pilot adjustable)
Accuracy: ± 5 feet (1.27 m) or 5%, whichever is greater
EXTERNAL DECISION HEIGHT OUTPUT: Isolated pair of relay contacts for switching
VISUAL WARNING SYSTEM:
Pilot Display Warning Flag:
Normal Operation:Flag hidden from view
Flag Condition:Power failure or altitude error
Indicator Needle:
Over Altitude:Needle hidden from view
0 to 2,000 feet (0 to 609.60 m)
external circuit. 110 mA at 28 Vdc, 3 watts
maximum continuous contact load.
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006-10536-0010 Rev. 10Oct/2005
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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
E.KA 54A ANTENNA
TSO COMPLIANCE:C87/ETSO-2C87 DO-160A
Env. Cat. D2AJXWFD
PHYSICAL CHARACTERISTICS:See FIGURE 2-11 KA 54A ANTENNA
Length:
Width:
Height:
WEIGHT: (2 required)See FIGURE 2-11 KA 54A ANTENNA
ALTITUDE:60,000 ft (18,281 m)
OPERATIONAL TEMPERATURE RANGE:-54° C TO +85° C
BEAMWIDTH:
E-Plane:45° min.
H-Plane:40° min.
SIDELOBES:Greater than -40 dB down
VSWR:4240 - 4360 MHz: 1.5:1 Maximum
GAIN:10 dBi (above isotopic)
POLARIZATION:Linear
POWER HANDLING:1 watt average, 10 watts peak
CROSS COUPLING: 20 in spacing - 88 dB max
36 in spacing - 95 dB max
INPUT IMPEDANCE:50 ohms nominal
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006-10536-0010 Rev. 10Oct/2005
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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
F.KA 54 ANTENNA (RETROFIT ONLY)
TSO COMPLIANCE:C87/ETSO-2C87 DO-138
Env. Cat. AAAAAX
PHYSICAL CHARACTERISTICS:See FIGURE 2-8 KA 54 ANTENNA OUTLINE AND MOUNT-
ING DRAWING
Length:
Width:
Height:
WEIGHT: (2 required)See FIGURE 2-8 KA 54 ANTENNA OUTLINE AND MOUNT-
ING DRAWING
ALTITUDE:55,000 feet (16,764 m)
OPERATIONAL TEMPERATURE RANGE:-54° C to +71° C
BEAMWIDTH:
E-Plane:50° ± 5°
H-Plane:40° ± 4°
SIDELOBES:Greater than 25 dB down
VSWR:4240 - 4360 MHz: 1.3:1 Maximum
GAIN:11.5 dBi (above isotopic)
POLARIZATION:Linear
POWER HANDLING:100 watts average, 1 kW peak
CROSS COUPLING:20 in spacing - 80 dB max
36 in spacing - 95 dB max
INPUT IMPEDANCE:50 ohms nominal
1.4UNITS AND ACCESSORIES SUPPLIED (KRA 405B SYSTEM COMPONENTS)
NOTE:Some part numbers may not be currently available. Consult the
current Honeywell catalog or contact a Honeywell representative
for equipment availability.
B.RADAR ALTIMETER INDICATOR - Honeywell KNI 415 or KNI 416
UNITPART NUMBERFACEPLATEPANEL LIGHTING
KNI 415066-3031-00BLACK 5 VOLT
KNI 415066-3031-01BLACK28 VOLT
KNI 415066-3031-02GRAY 5 VOLT
KNI 415066-3031-03GRAY28 VOLT
KNI 415066-3031-04BLACKNIGHT VISION
KNI 416066-3044-00BLACK 5 VOLT
KNI 416066-3044-01BLACK28 VOLT
KNI 416066-3044-02GRAY 5 VOLT
KNI 416066-3044-03GRAY28 VOLT
KNI 416066-3044-04BLACKNIGHT VISION
TABLE 1-1 KNI 415/416 INDICATOR AVAILABILITY
C.RADAR ALTIMETER ANTENNAS (2 each)
Honeywell KA 54A, Part Number 071-1501-00 (White)
Part Number 071-01501-0100 (Black)
Gaskets are included with a new antenna. They may be ordered
separately as P/N 187-01753-0000.
NOTE:The KA 54 Radar Altimeter Antenna is compatible with the
KRA 405B and may be used in retrofit situations. However,
this antenna is no longer available from the factory.
D.KRA 405B INSTALLATION KIT
P/N 050-03365-00XX which includes the following:
PART NUMBERDESCRIPTIONUM-00-01-02-03VENDOR PART NUMBER
030-02077-000041 Pin Conn SolderEA1100CANNON KPT06B2041S
030-02077-000441 Pin Conn CrimpEA0011CANNON KPSE06F20-41S
057-05944-0017TSO KIT LABELEA1000N.A.
057-05944-0018TSO KIT LABELEA0100N.A.
057-05944-0019TSO KIT LABELEA0010N.A.
057-05944-0020TSO KIT LABELEA0001N.A.
071-04003-0000Mounting RackEA1010
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006-10536-0010 Rev. 10Oct/2005
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KRA 405B RADAR ALTIMETER INSTALLATION MANUAL
E.KNI 415/416 INDICATOR INSTALLATION KIT
P/N 050-01401-0002 which includes the following:
PART NUMBERDESCRIPTIONUM-02VENDOR PART NUMBER
030-02210-0012ConnectorEA1ITT CANNON KPS306F14-19SY
057-02029-0008Connector LabelEA1
057-02029-0009Connector LabelEA1
073-00044-0001Plate, MooringEA1
073-00045-0000Plate, Adapter BlkEA1
073-00045-0001Plate, Adapter GryEA1
089-05115-0012FHP 6-32x3/4, Blk ScrEA4
089-06461-0012FHP 6-32x3/4, Gry ScrEA4
F.KA 54A RADAR ALTIMETER ANTENNA INSTALLATION KIT
P/N 050-02960-0000 which includes the following:
PART NUMBERDESCRIPTIONUMQTYVENDOR PART NUMBER
030-00108-0000Conn RG 214-TNCEA4TED 5-10-43
*See TABLE 1-2 CABLE INSTALLATIONS for alternate cable
installations.
1.5 ACCESSORIES REQUIRED BUT NOT SUPPLIED
A.RG 393 Cable (preferred cable) Part Number 024-00075-0000 (see
TABLE 1-2 CABLE INSTALLATIONS for minimum and maximum lengths).
B.For other cable installations, see TABLE 1-2 CABLE INSTALLATIONS.
Cable TypePart NumberAttenuation/Min totalMax TotalMin Bend
TED = TED Manufacturing Corporation
ECS = Electronic Cable Specialists, Inc.
PIC = PIC Wire And Cable
TABLE 1-2 CABLE INSTALLATIONS
C.To allow for a valid on-ground calibration, the total installed ca-
ble length plus twice the antenna height above ground must not exceed 200 feet. This will only be a practical consideration for antennas mounted above 30 feet.
1.6OPTIONAL ACCESSORIES RECOMMENDED BUT NOT SUPPLIED
PART NUMBERDESCRIPTIONUMQTYVENDOR PART NUMBER
030-01157-0011SOCKET CRIMP 20GEA10POSITRONIC FC6020D-14
030-01171-0000CONN SUB-D HSG 9SEA1POSITRONIC RD09F00000-782.0
030-02351-0000HOOD AND LEVER ASSYEA1POSITRONIC D9000JVL0-476
071-00097-0100CM 2000 CONFIG MODEA1HONEYWELL
155-06016-0000INSTALL DWG.RF1N.A.
Page 1-12
006-10536-0010 Rev. 10Oct/2005
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