THALES Communications OPERATION AND INSTALLATION MANUAL AHV1600 Radar Altimeter System ORIGINAL ISSUE REF REVISION No : July 16/09 : 36719226-AA :0 TP Page 1/2 July 16/09
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OIM AHV1600-SYSTEM THALES COMMUNICATIONS TABLE OF CONTENTS PAGES INTRODUCTION .................................................................................................................................................1 1. GENERAL INFORMATION ......................................................................................................................1 2. BLOCK PAGE NUMBERS FOR SECTIONS ...........................................................................................1 3. UPDATING ...
OIM AHV1600-SYSTEM THALES Communications PAGES IN FLIGHT TESTS ........................................................................................................................... 205 4. FUNCTIONAL CONNECTIONS WITH RELATED EQUIPMENT........................................................ 205 A. INTERFACES CONNECTIONS....................................................................................................... 205 B. GROUNDING AND BONDING .....................................................
OIM AHV1600-SYSTEM THALES COMMUNICATIONS TABLE OF FIGURES PAGES Figure 1 – AHV1600 TRANSCEIVER SYSTEM ...........................................................................................4 Figure 101 – AHV1600 RADAR ALTIMETER SYSTEM BLOCK DIAGRAM............................................101 Figure 102 – AHV1600 TRANSCEIVER - GENERAL VIEW .............................................................102 Figure 103 – OVERALL DIMENSIONS..................................................................
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OIM AHV1600-SYSTEM THALES COMMUNICATIONS INTRODUCTION 1. GENERAL INFORMATION The manual contains the information for the installation and the operation of the AHV1600 Radar Altimeter P/N: AHV1600-01-01 00 A for Aircraft. 2.
OIM AHV1600-SYSTEM THALES Communications 4. ADVISORIES A. SAFETY INSTRUCTIONS / ELECTROSTATIC DISCHARGE PRECAUTIONS This graphic symbol showing a hand on a dark background (to IEC 747-1 standard) means that the equipment on which it appears (assembly or subassembly) contains components sensitive to electrostatic discharges.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS 5. UNCOMMON ABBREVIATIONS AND ACRONYMS The following abbreviations, acronyms, and symbols are used in this manual: Abbreviation/Acronym Identification A/D AGL AID ANT AU BIT CBIT CR CSCI CTZ CW D/A dB dBm DC DMB EMC Fb FM FT Fore HI HIRF IBIT IEC I/O LO LRU LSB MAX MIN MPC NCD NO PBIT PC P/N R/A or RA RET RF RL Rx S.I.
OIM AHV1600-SYSTEM THALES Communications Abbreviation/Acronym Identification ST SWR Tx USB VCO Saw Tooth Standing Wave Ratio Transmission Upper Significant Bit Voltage Controlled Oscillator INTRO Page 4 July 16/09
OIM AHV1600-SYSTEM THALES COMMUNICATIONS EQUIPMENT IDENTIFICATION SHEET AHV1600_RADAR ALTIMETER SYSTEM F0057 AHV1600 Transceiver Coaxial Antenna ANT-140A PHYSICAL CHARACTERISTICS MAIN COMPONENTS Qty DIMENSIONS (mm) Length Transceiver: AHV1600 1 Antenna: ANT140A 2 190 max WEIGHT P/N Width Height (kg) 90 max 95 max 2 kg AHV1600-01-01 00 A 33 max 0.130 ± 20 g 9599-607-12352 105.41 max 90.
OIM AHV1600-SYSTEM THALES Communications AHV1600 TRANSCEIVER TECHNICAL CHARACTERISTICS 1- Nominal power supply: 28 Vdc 2- Power consumption: 20 W max (18 W typical) 3- Power input interruption : 2 ms 4- Connection: MIL C 39012 (TNC / RF connectors), MIL C38999 (main connectors) 5- Performance: Transmission : FM/CW. Frequency Range : 4.2 GHz to 4.4 GHz. Frequency Deviation : 123 MHz typical. Transmitted Power : + 18 dBm max typical.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS GENERAL 1. AHV1600 RADAR ALTIMETER MAIN FUNCTION The main function of the AHV1600 Radar Altimeter is to provide the height information, via an ARINC 429 digital bus, to the aircraft navigation system, in a range from 0 ft up to 5000 ft. It uses the fact that the electromagnetic waves propagate through the air at a constant speed c, which is the speed of the light. The height information is defined as the shortest distance to the "terrain" (ground or sea). 2.
OIM AHV1600-SYSTEM THALES Communications The AHV1600 Transceiver performs FM/CW modulation transmissions that are beat against the received reflection. The variable slope modulation allows the beat frequency to be maintained in a given bandwidth (window of 60 kHz to 110 kHz around centre frequency of 80 kHz). The window is then analysed through the equivalent of a 1 kHz bandwidth filter sweeping from 15 kHz to 110 kHz.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS in the beat signal spectrum provides an accurate height measurement, and a TST for the feedback loop to keep fbo in its defined frequency range from one measurement to the other. Hence the relationship : Ho K . fbo where K c.TST 2.F 3. BUILT IN TEST FUNCTION The AHV1600 Transceiver implements an operational built-in test (BIT) in the following steps: A.
OIM AHV1600-SYSTEM THALES Communications AVH1600 TRANSCEIVER Digital/Management Board Mother Board (Including I/O) Radio Module Tx Emission Rx Reception ANT140A 4.2 /4.4 GHz Antenna ANT140A 4.2 /4.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS PRESENTATION 1. AHV1600 RADAR ALTIMETER SYSTEM GENERAL DESCRIPTION The Radar Altimeter System, named AHV1600, consists of three LRU (Line Replaceable Unit) and is composed of: one AHV1600 transceiver, one antenna ANT-140A to transmit radio frequency (RF) signal, one antenna ANT-140A to receive radio frequency (RF) signal.
OIM AHV1600-SYSTEM THALES Communications Two discrete inputs (“FCT_TST and TST_INH” signals). Configurable inputs (“AID<2..0>, AID_P and SDI_SEL” signals). 2. AHV1600 TRANSCEIVER The AHV1600 Transceiver is a compact and very light system. It is intended to fit the aircraft. It is fixed on the aircraft structure by means of four M6 screws. The unit is made up of a chassis with a front panel.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS A. EXTERNAL CHARACTERISTICS (1) PHYSICAL CHARACTERISTICS Dimensions (see figure 103): max. 190 x 90 x 95 mm. The weight of the unit is < 2 kg. Figure 103 – OVERALL DIMENSIONS Note: all dimensions are in mm (2) FRONT PANEL The front panel bears the antennae connectors, the main connectors , the specific label, the amendment label, the ESD label and the immunity label.
OIM AHV1600-SYSTEM THALES Communications (3) IDENTIFICATION (a) Manufacturing Serial Number Label The manufacturing serial number label is stuck on the left side (refer to Figure 102).
OIM AHV1600-SYSTEM THALES COMMUNICATIONS (c) Amendment label Figure 106 – AMENDMENT LABEL (d) Specific label The specific label is stuck on the front panel (refer to Figure 102).
OIM AHV1600-SYSTEM THALES Communications B. INTERNAL SUB-ASSEMBLIES The AHV1600 Transceiver contains the following sub-assemblies: – The Digital chassis: Performs the High Intensity Radiated Field (HIRF) protection, internal module interconnection, digital and management processor capacity and power supply distribution, Provides the helicopter with the mechanical and electrical interfaces, Provides the hardware support of the downloaded software’s.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS when measured to the “M_GND” reference signal.
OIM AHV1600-SYSTEM THALES Communications Height data field: Bits<29..13>Height value Height range from 0 ft up to + 5500 ft LSB value 0.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS Source Destination Identifier (SDI) data field : Bits<10..9> Discrete input “SDI_SEL” 00 Undefined 01 Discrete grounded 10 Discrete open 11 Not used Aircraft Installation delay (AID) data field : Bits<14..11> AID Value (fte) AID_P AID<2..
OIM AHV1600-SYSTEM THALES Communications Test inhibit data: Bits<18> Discrete input “TST_INH” 0 Discrete grounded 1 Discrete open Status Matrix data field (discrete data word): Not used 10 Not used 11 Failure warning (FW) 12 11 10 AID0 AID_P Reserved Reserved FCT_TST TST_INH Reserved 0 Reserved 0 Reserved Spare 0 Reserved Spare 0 Reserved Spare 0 Reserved Spare SM 13 9 SDI 8 7 1 Label data field: Bits<8..
OIM AHV1600-SYSTEM THALES COMMUNICATIONS 10 Discrete open 11 Not used AHV1600 Transceiver function data field : Bits<18..17> AU Transceiver function” 00 Search 01 Track 10 No function 11 Reserved PBIT / IBIT data : Bits<19> PBIT / IBIT 0 BIT in progress 1 BIT not required AHV1600 Transceiver mode data field: Bits<21..20> AU Transceiver mode 00 Reserved 01 Operational 10 Reserved 11 Reserved Failure data field: Logic state Bit<29..
OIM AHV1600-SYSTEM THALES Communications Status Matrix data field (discrete data word): 19 18 17 16 15 14 13 12 11 10 9 SDI 0 8 7 6 0 5 4 3 2 1 0 Label « 272 » 1 0 1 1 1 MSB 0 20 LSB 0 21 Spare 22 Reserved 23 Reserved 24 Reserved 25 Reserved 26 AU Transceiver function 27 PBIT / IBIT 28 AU Transceiver mode 29 Reserved Failure warning (FW) Spare 11 Spare Not used Radio failure 10 CPU failure Not used I/O failure 01 PSU failure SM Normal Operat
OIM AHV1600-SYSTEM THALES COMMUNICATIONS RA Undefined RA1 Discrete grounded RA2 Discrete open “Part Number” data field defined as per ten characters. e.g. “61778974AC” 8 1 7 6 5 4 3 2 Label « 371 » 0 0 1 1 1 1 MSB Character = 1 9 LSB MSB Character = 2 Spare LSB MSB Character = 3 Spare LSB MSB Parity 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 LSB “Serial Number” data field defined as all characters from Part Number plus five number characters.
OIM AHV1600-SYSTEM THALES Communications (e) Height data word label 377 description Label data field: Bits<8..1> Label value 111 111 11 377OCT Source Destination Identifier (SDI) data field : Bits<10..9> Discrete input “SDI_SEL” 00 Undefined 01 Discrete grounded 10 Discrete open 11 Not used Equipment identification data field: Bits<22..
OIM AHV1600-SYSTEM THALES COMMUNICATIONS (f) Height data word label 165 description Label data field: Bits<8..1> Label value 101 011 10 165OCT Source Destination Identifier (SDI) data field : Bits<10..9> Discrete input “SDI_SEL” 00 Undefined 01 Discrete grounded 10 Discrete open 11 Not used Height data field: Bits<29..11>Height value Height range from 0 ft up to + 5500 ft LSB value 0.
OIM AHV1600-SYSTEM THALES Communications 0 Height data value in BCD format 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 9 SDI 1 8 7 1 6 5 4 3 2 Label « 165 » 0 1 0 1 1 1 Figure 115 – ORGANIZATION OF HEIGHT DATA WORD LABEL “165" (3) DISCRETE INPUT SIGNAL (a) Discrete input signal “FCT_TST” The AHV1600 transceiver receives the discrete input signal “FCT_TST” from the navigation and guidance systems to activate its “Built In Test (BIT)” function.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS Initiated Built In Test (IBIT) function inhibited when it is set to low level voltage (discrete grounded). Initiated Built In Test (IBIT) function enabled when it is set to high level voltage (discrete open). In the AHV1600 transceiver, the discrete input signal “TST_INH” shall be in accordance with the following electrical characteristics: Low level voltage + 3.5 VDC with sink current < 2mA (discrete grounded). High level voltage +15.
OIM AHV1600-SYSTEM THALES Communications - differential null level voltage differential output impedance : 0 Vdc 0.5 Vdc : 75 5 (b) When measured to the AID ground reference signal in loaded circuit - differential low level voltage differential high level voltage differential null level voltage : between - 11 Vdc and - 7.25 Vdc : between + 7.25 Vdc and + 11 Vdc : between - 0.5 Vdc and + 0.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS (5) PERFORMANCE Altitude: 5000 ft Height accuracy: ( 2 ft + 2% of the true height) D. ENVIRONMENTAL CONDITIONS DO160E Cat.
OIM AHV1600-SYSTEM THALES Communications E.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS Longitudinal Axle Figure 116 – ANT-140A INNER SIDE The outside bears the inscription “DO NOT PAINT”, as well as an antenna-positioning symbol.
OIM AHV1600-SYSTEM THALES Communications C. FUNCTIONAL CHARACTERISTICS – Operating frequency band: 4.2 GHz – 4.4 GHz. – Match: The return loss on 50 ohms complies with the following diagram Isotropic gain: ≥ 7 dBi from 4.2 GHz to 4.4 GHz Radiation pattern: Half-power beamwidth (- 3 dB): Roll (E-Plane) : 60° 7° Pitch (H-Plane) : 50° 5° NOTE: The E-plane is perpendicular to the direction of the straight line painted on the external antenna front face.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS (2) AID DEFINITION Installation Delay (AID) is the total electrical length from the transceiver transmitting output port to the aircraft skin, via the transmitting antenna the add to the distance from the antenna to the ground, add to the distance from ground to receive antenna and back to the transceiver receiving output via the receiving antenna.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS INSTALLATION 1. GENERAL CONDITIONS A. POWER SUPPLY A nominal voltage of 28 Vdc powers the equipment. It can nevertheless operate within a DC power supply range of 22 V to 30.3 V. The absorbed power at 28 V is less than 20 W. It is typically 18 W. The primary power supply circuit is isolated from the secondary circuit. B.
OIM AHV1600-SYSTEM THALES Communications VSWR 3 to 1 of each antenna (return loss of - 6 dB or less) over the frequency range 4.2 GHz to 4.4 GHz. All sides lobes of each antenna must be down 40 dB or better. Coax cable 50 ohms double shielded type RG400 or equivalent. Losses in both the transmission and reception coaxial cables are of 4 dB minimum and 7 dB maximum. Each antenna shall be grounded on the aircraft frame, on a common metallic grounded structure for both antennae.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS A. CHOICE OF ANTENNAE LOCATION Choose the location of the antennae carefully. On it will depend the operation of the Transceiver in all flight configurations. Antennae are generally mounted: Under the fuselage. Such that the H fields are collinear - this configuration corresponds to maximum decoupling between antennae. The antennae centre line should be preferably parallel to the aircraft Fore and AFT axis.
OIM AHV1600-SYSTEM THALES Communications Figure 201 – ANT-140A – ANTENNAE SEPARATION AND ORIENTATION B. ANTENNA MOUNTING Antennae must be flush-mounted, from below, in the lower part of the aircraft fuselage. Antennae connectors must imperatively face: forwards for the front antenna, rearwards for the rear antenna. Each antenna bears a red ink marking to indicate assembly orientation into aircraft.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS C. CONNECTION The electrical connection for operational use of each antenna is made by means of a single coaxial connector. Type of connector mounted on antenna: 50 ohm female coaxial type TNC connector conforming to specification MIL-C-39012. 3. VERIFICATION When the AHV1600 Transceiver is installed, a verification of the operation must be done using the PBIT. This verification must be done in operational conditions. A.
OIM AHV1600-SYSTEM THALES Communications CONNECTOR LABEL FUNCTION CONNECTOR REFERENCE MATING CONNECTOR REFERENCE J1 Main connector MIL C- 38999 / MS27468 T 15 B-35 PN (*) MT934-T15B35PM112 J2 To Antenna TX MIL C 39012 34MMBX-TNC-501/1-2-NE J3 To Antenna RX MIL C 39012 34MMBX-TNC-501/1-2-NE (*) Note: The MIL reference designates a connector including the main external characteristics: - 37 pins, - Shell size 15, - Drab olive green finish, - Male contacts, - Normal polarization. B.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS C. COOLING OF THE EQUIPMENT The AHV1600 on platform installation must take into account that heat dissipation for the Transceiver is partially accomplished through natural convection requiring a minimum space between the Transceiver and the next equipment of 10 mm. The remained part of the heat is dissipated by conduction between the bottom part of the Transceiver chassis and the platform frame. The maximum heat dissipation is 20 watts. D.
OIM AHV1600-SYSTEM THALES Communications Contact Gauge 12 22D 13 22D O TX429_HI_2 Twisted/Shielded see note 2&3 Differential output serial line 14 22D O TX429_HI_2 Twisted/Shielded see note 2&3 Differential output serial line 15 22D 16 22D I AID2 Simple (as short as possible) see note 4 Configurable input signal 17 22D I P28V_1 Twisted see note 1 Power supply input 1 18 22D I P28V_2 Twisted see note 1 Power supply input 2 19 22D I RET28V_2 Twisted see note 1 Power su
OIM AHV1600-SYSTEM THALES COMMUNICATIONS Input (I) / Output (O) Installation Requirements Socket Contact Contact Gauge 31 22D Reserved 32 22D Reserved 33 22D O E_GND 34 22D I SDI_SEL 35 22D Reserved 36 22D Reserved 37 22D Reserved Signal Name Wire Type Electrical reference ground Simple (as short as possible) see note 4 Configurable input signal Note 1 :Twisted wire type Note 2 : Twisted + Shielded wire type (shield shall be terminated at the connector EMI backshell) Note 3
OIM AHV1600-SYSTEM THALES Communications A2 Note 4 : Simple wire type Note 5: The M_GND reference signal must be connected to the mechanical reference ground of the carrier B.
OIM AHV1600-SYSTEM THALES COMMUNICATIONS FCT_TST TST_INH TX429_HI_1 TX429_LO_1 ARINC 429 LINE TX429_HI_2 TX429_LO_2 ARINC 429 LINES AID2 P28V_1 P28V_2 RET28V_2 AID_P AHV1600 TRANSCEIVER INTERNAL DEVICES +28Vdc (first) +28Vdc (second) 28Vdc RETURN (second) AID0 AID1 RET28V_1 28Vdc RETURN (first) E_GND SDI_SEL Figure 203 – INTERCONNECTIONS Page 211 July 16/09
OIM AHV1600-SYSTEM THALES COMMUNICATIONS OPERATION 1. RADAR ALTIMETER ENERGIZATION The AHV1600 radar altimeter is not provided with an “ON-OFF” switch. The equipment starts operating as soon as the + 28 VDC power supply is applied by a circuit breaker or other mean located on the helicopter front panel. 2. FUNCTIONNAL TEST When the functional test is requested, the system shall outputs a 100 ft test height and functional test is indicated in the status matrix of word labels 164 and 165. 3.
OIM AHV1600-SYSTEM THALES Communications 6.
