REPRODUCTION OF THIS PUBLICATION OR ANY PORTION THEREOF BY ANY MEANS
WITHOUT THE EXPRESS WRITTEN PERMISSION OF HONEYWELL IS PROHIBITED. FOR
FURTHER INFORMATION CONTACT THE MANAGER, TECHNICAL PUBLICATIONS,
HONEYWELL, ONE TECHNOLOGY CENTER, 23500 WEST 105TH STREET OLATHE KS
66061 TELEPHONE: (913) 782-0400.
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System Installation Manual
P/N 006-10640-0000
KHF 1050
HF Communication System
(Also known as Primus HF 1050)
KAC 1052 Antenna Coupler
KPA 1052 Power Amplifier
KRX 1053 Receiver/Exciter
Compatible HF Control Units
Testing and1001Mar/2003
Faul t Isolation1002Mar/2003
F INDICATES FOLDOUT PAGES - PRINT ONE SIDE ONLY
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LIST OF EFFECTIVE PAGES
SUBJECTPAGEDATESUBJECTPAGEDATE
F 2125Mar/2003
2126Blank
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TABLE OF CONTENTS
INTRODUCTION
SECTIONPAGE
1.GeneralINTRO-1
2.Layout of MaterialINTRO-1
3.Revision ServiceINTRO-1
DESCRIPTION AND OPERATION
SECTIONPAGE
1.System Description 1
A. System Overview 3
B. System Component Descriptions 4
C. Component Installation Kits 5
D. Equipment Required But Not Supplied 6
E. Optional (Non-Essential) Aircraft Equipment 8
F. Related Publications 8
2.Component Configurations 9
A. KAC 1052 Antenna Coupler Configurations 9
B. KPA 1052 Power Amplifier Configurations 9
C. KRX 1053 Receiver/Exciter Configurations 9
D. RM-855 Radio Management Unit Configurations 9
E. MCDU Multifunction Control and Display Unit Configurations 9
F. PS440 Control Display Unit Configurations 9
G. ???? Antenna Configurations 9
H. Long Wire HF Antenna Configurations 9
3.System Leading Particulars10
A. General Specifications10
B. System Operating Modes10
C. Component Leading Particulars13
4.System Function15
A. System Functional Overview15
B. Dual System16
5.Component Functions16
A. RM-855 Radio Management Unit Function16
B. MCDU Multfunction Control and Display Unit Function16
C. PS440 Control Display Unit Function16
6.System Inputs/Outputs17
A. Input/Output Signals17
TABLE
COMMENTARY: ALL SECTION TABLES TO BE LISTED HERE AS THEY ARE INSERTED.
FIGURE
COMMENTARY: ALL SECTION FIGURES TO BE LISTED HERE AS THEY ARE INSERTED
PAGE
PAGE
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TABLE OF CONTENTS
TESTING AND FAULT ISOLATION
SECTIONPAGE
1.Fault Isolation1001
2.System Performance Check1002
A. Preliminary Check1002
B. Receiver Performance Check1002
C. Transmitter Performance Check1002
INSTALLATION AND MAINTENANCE
SECTIONPAGE
1.General Coverage2001
2.Unpacking2001
3.Pre-installation Testing2001
4.Equipment Changes and Markings2002
5.Installation Planning2002
A. General Considerations2002
B. Location of Equipment2002
C. Interwiring and Cable Fabrication2017
D. Strapping Options2052
6.Equipment Installation2055
A. Bonding Connections2055
B. KCU 951 Control Unit Installation2056
C. KFS 594 Miniature Control Unit Installation2056
D. KA 594 Bus Adapter Installation2056
E. KCU 1051 Control Display Unit Installation2056
F. KAC 952 Power Amplifier/Antenna Coupler Installation2057
G. KTR 953 Receiver/Exciter Installation2061
H. Antenna Installation2062
I. KA 161 External Capacitor Installation2063
J. KA 158 Bridging Amplifier Installation2064
K. KA 160 Dual Antenna Adapter Installation2064
L. KA 162 Dual External Capacitor Installation2065
7.Inspection, System Checkout, and Flight Test Procedures2065
A. Inspection2065
B. System Checkout2068
C. Flight Test2068
8.Removal and Re-installation2069
A. KCU 951 Control Unit Removal and Re-installation2069
B. KFS 594 Miniature Control Unit Removal and Re-installation2069
C. KA 594 Bus Adapter Removal and Re-installation2069
D. KCU 1051 Control Display Unit Removal and Re-installation 2069
E. KAC 952 Power Amplifier/Antenna Coupler Removal2070
F. KTR 953 Receiver/Exciter Removal and Re-installation2070
G. KA 98 Antenna Removal and Re-installation2071
H. KA 161 External Capacitor Removal and Re-installation2072
I. KA 158 Bridging Amplifier Removal and Re-installation2073
J. KA 160 Dual Antenna Adapter Removal and Re-installation2074
K. KA 162 Dual External Capacitor Removal and Re-installation2074
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TABLE OF CONTENTS
9.Maintenance Procedures2075
A. In-Aircraft Adjustments2075
B. System Protection2075
C. Lubrication2076
D. Cleaning2076
10. System Maintenance Programs2076
A. System Maintenance Recommendations2076
B. Field Alignment of KTR 953 Receiver/Exciter (-51, -53)2076
TABLE
COMMENTARY: ALL SECTION TABLES TO BE LISTED HERE AS THEY ARE INSERTED.
FIGURE
COMMENTARY: ALL SECTION FIGURES TO BE LISTED HERE AS THEY ARE INSERTED
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TABLE OF CONTENTS
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KHF 1050 SYSTEM INSTALLATION MANUAL
Preliminary - Subject to Change Without Notice
1. General
This manual provides description and operation, testing,
fault isolation, installation, maintenance, and flightline
checkout procedures for the KHF 1050 HF Communication System.
2. Layout of Manual
Section 1Description and Operation
Section 1000Testing and Fault Isolation
Section 2000Installation and Maintenance
Refer to the Table of Contents for the location of applicable
information.
Weights and measurements in the manual are in English units,
unless otherwise stated.
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INTRODUCTION
3. Revision Service
The manual will be revised as necessary to reflect current
information. Service Bulletins may be issued separately, and
will be incorporated in the manual as appropriate.
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Glossary of Terms and Abbreviations
A/CAircraft
AGCAutomatic Gain Control
AMEAmplitude Modulation Equivalent
ARMThe ready to operate status of a function/device.
CFRClarifier
CLKClock
COMPCompatible
CPLRCoupler
GNDGround
HFHigh Frequency
LCDLiquid Crystal Display
LSBLower Side Band
MCDUMultifunction Control and Display Unit
MICMicrophone
NVGNight Vision Goggles
ORTHOGONALIntersecting at right angles.
PAPower Amplifier
PROCProcessing, Processor
PEPPeak Envelope Power
PTTPush To Talk
PWRPower
RCReduced Carrier
RCVRReceiver
RDYReady
REFReference
RFRadio Frequency
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Glossary of Terms and Abbreviations
RMURadio Management Unit
RTCARadio Technical Commission for Aeronautics
RTNReturn
RXReceive
SELCALSELective CALling
SELECTIVITYThe ability of a receiver to differentiate desired
RF signals from undesired signals and other
disturbances within specified frequency and dB
limits.
SENSITIVITYThe ability of a receiver to detect and demodulate
desired signals at specified minimum RF levels.
SIDETONEThe small portion of the transmitter signal that is
fed back to the receiver’s audio circuit.
SIGSignal
SQUELCHThe ability to disable the demodulated output of a
radio receiver until a preset level of RF input is
received. The level of received RF signal required
to break squelch is determined by the squelch
control setting.
SSBSingle Side Band
SYNSynthesize(r), Synchronize(r)
TCXOTemperature compensated crystal oscillator
TRANLINETransmission Line
TXTransmit
USBUpper Side Band
VOLVolume
VSWRVoltage Standing Wave Ratio
XCTRExciter (low level signal source that drives power
amplified transmitted signal).
XMTTransmit
XMTRTransmitter
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DESCRIPTION AND OPERATION
1. System Description
A basic KHF 1050 HF Communication System consists of three
individual units: KAC 1052 Antenna Coupler, KPA 1052 Power
Amplifier, and KRX 1053 Receiver/Exciter. A compatible control
unit is also required. Control units compatible with the system
include the Gables PS440, Honeywell MCDU Multifunction Control
and Display Unit and Honeywell RM-855 Radio Management Unit.
NOTE:For complete installation information on the Gables
PS440 refer to the PS440 Control Display Unit
Installation Manual P/N 006-10655-0000.
For complete installation information on the MCDU
Multfuntion Control and Display Unit refer to the MCDU
Installation Manual P/N XXXX.
For complete installation information on the RM-855
Radio Management Unit refer to the RM-855 Installation
Manual P/N XXXX.
Typical System
Figure 1
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PS440 Control Display Unit
Figure 2
MCDU Multfunction Control and Display Unit
Figure 3
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RM-855 Radio Management Unit
1.A. System Overview
The KHF 1050 HF voice and data communication system is a solid
state design with 200 watts (PEP) of output power, operating
at 28 Vdc. Frequency of operaton ranges between 2.0 and
29.9999 MHz with 100 Hz resolution. Systems may be strapped
to set the upper frequency limit to 22.9999 MHz.
NOTE:Operations are limited to 25 MHz for aircraft
installation by aeronautical mobile band frequency
limits.
A configuration is called a “dual system” when two KHF 1050
HF systems are installed in the same aircraft to share one
antenna. Both systems may receive simultaneously, but only one
system is chosen to transmit at any one time. An auto select
transmit scheme determines which system is selected to
transmit.
Figure 4
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In an auto select configuration, the first system (System 1
or System 2) to be keyed is selected to transmit, and
transmission from the other system is inhibited until the
first system has stopped transmitting.
The RM-855 Radio Management Unit, the MDCU Multifunction
Control Display Unit, or the PS440 Stand-Alone HF Controller
determines the frequency and mode of operation of the system
and displays that information to the pilot.
Receiver and low level transmitter signals are located in the
KRX 1053 Receiver/Exciter. The KRX 1053 Receiver/Exciter
employs an oven controlled oscillator, which requires a short
warm-up period to generate the frequency reference required
for the synthesizer.
The KAC 1052 Power Amplifier amplifies the excitation signal
from the KRX 1053 Receiver/Exciter to 200 watts PEP, or 50
watts of carrier power in AM. The amplified signal is routed
to the KAC 1052 Antenna Coupler, which matches the various
impedances of the antenna to the 50 ohm output of the
transmitter. In receive function, signals from the antenna
pass through the KAC 1052 Antenna Coupler to the KRX 1053
Receiver/Exciter.
The KHF 1050 can be installed as a single or dual HF system.
In a dual system when one system is transmitting, receive on
the other system is disbled. The single antenna in a dual
system can be tuned to only one frequency at any given time.
If the two systems are tuned to different frequencies, the
strongest reception is realized on the primary system, which
is tuned to the same frequency as the antenna. The primary
system is defined as the system that was last used for
transmission in auto-select configuration. The secondary
system would employ an internal bridging amplifier to improve
reception. No external accessories ae required for dual system
operation for the KHF 1050.
When two independent HF systems employing two separate
antennas are used on one aircraft, it is important to maximize
separation between the antennas. A minimum of 6 ft. (2 m.)
separation is recommended and the antennas should be
configured as orthogonally as possible.
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WARNING:IN A DUAL KHF 1050 INSTALLATION, PERMANENT DAMAGE
WILL OCCUR TO THE SYSTEM IF EITHER THE RF OR DC
CABLES ARE NOT CONNECTED PROPERLY BETWEEN HF1 AND
HF2. IT IS RECOMMENDED THAT HF1 CABLES BE COLOR
CODED RED AND HF2 CABLES BE COLOR CODED GREEN.
Several operating mode options are available for the KHF 1050
HF system to meet particular operational needs.
USB (upper sideband A3J) AME (amplitude modulation equivalent
A3H) are standard modes of operation permitted on all system
configurations.
LSB (lower sideband A3J) operation is not permitted for
stations operating under Part 87 FCC (USA) regulations. LSB
may be enabled for use in regions or applications where its
use is authorized.
A seldom used mode A3A (USB reduced carrier) if available for
use in locations that may utilize the mode.
Table 23, Modes of Operation, lists the modes of operation
applicable to the PS440, MCDU, and RM-855 controllers.
The system is capable of operating in a channel (frequency
preset) mode or a direct frequency mode. A microcomputer
within the system provides the following functions:
•controls the non-volatile storage of frequency, mode and
channel data
•controls a multiplexed eight-digit frequency display
•provides synthesizer serial data tuning information
•provides tune and transmit mode control logic
•provides band switching information
•preset antenna tune
•built-in test with fault display
Dashed lines and shaded boxes in the block diagram, Figure 5,
indicate for future use.
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Typical System Block Diagram
Figure 5
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This version of the block diagram does not attempt to show
the interconnectins between the receiver/exciter, the power
amplifier, and the antenna coupler.
This version of the block diagram corresponds to the content
of Technical Specification Rev C, January, 2002.
1.B. System Component Descriptions
The required and optional equipment of a KHF 1050 HF
Communication System is listed below:
Under microprocessor control, the KAC 1052 antenna coupler
selects tuning network configurations, impedance
transformations and binary capacitance and inductance to
produce a VSWR of 2.5:1 or less upon initial tune. The
VSWR may then deteriorate to 3:1 before the coupler will
retune when transmit is next initiated.
1.B.(2)KPA 1052 Power Amplifier
(P/N 064-01072-0101)
The KPA 1052 is a high frequency power amplifier. From 2.0
to 29.999MHz, the power amplifier is capable of linear
amplification of a 0dBm signal to a 200 Watt output level
at 50 ohms input and output impedance.
The KRX 1053 is a high frequency receiver/exciter that is
designed to operate from 2.0 to 29.999MHz synthesized in
100Hz steps. The unit will operate Amplitude Modulation
Equivalent, Upper and Lower Sideband modes and
Required-Carrier mode.
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1.B.(4)Gables PS440 Control Display Unit
(P/N 071-01605-0101, -0201, -1101, -1201, -2101)
The PS440 stand-alone HF COMM Control Panel is designed
to provide control of a single or dual HF COMM radio
system. Full operational control of the HF system is
accomplished via a dedicated low speed, digital ARINC 429
bus.
1.B.(5)MCDU Multfunction Control and Display Unit
(P/N 7025725-901, -910, -920, -930, -940)
This multi-function radio controller provides control of
all the functions of the KHF 1050 system via ARINC 429.
Frequency, channel, squelch type and level, emission type
and power level are selected from the MCDU.
1.B.(6)RM-855 Radio Management Unit
(P/N 7013270-967/968)
The RM-855 displays frequency, mode and maintenance
information. Via the ARINC 429 bus it provides frequency,
channel, transmitter power and squelch level selection.
It also has fault monitoring and fault annunciation.
1.C. Component Installation Kits
COMMENTARY: THE FOLLOWING INSTALLATION KIT INFORMATION IS