OPERATIONAL DESCRIPTION REV1

FCC ID: KVJAHV1600

Operational Description

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FCCID_1207479

COMPONENT MAINTENANCE MANUAL P/N 61778974AC DESCRIPTION AND OPERATION TASK 34-42-61-870-801-A01 1. DESCRIPTION A. Principle The purpose of a Radio Altimeter system is to provide the helicopter with accurate measurements of the minimal distance to the terrain (ground or sea). A Radio Altimeter is a kind of RADAR system, i.e. it uses the fact that the electromagnetic waves propagate through the air at a constant speed c , which is the speed of the light. B. General The AHV1600 Transceiver has 2 two mains sub-assembly: - Digital Chassis, - Radio Module. The Digital Chassis: - achieves 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. The Radio Module: - achieves the Radio Frequency (RF) signal emission, the Radio Frequency (RF) signal reception and the Beat Frequency (BF) signal extraction. C. Physical description The AHV1600 Transceiver is a metallic housing in the form of a parallelepiped protected by a black polyurethane painting. It is made of a chassis with a front panel equipped with: - an identification label, - an amendments label, - a main connector, - two coaxial connectors: • one receive connector “RX” (J1), • one transmit connector “TX” (J2). 34-42-61 Page 1 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC The AHV1600 Transceiver has: - a radio module (5), - a digital chassis which has: • a digital management board (2), • a power supply stage (1), • a mother I/O stage (3), • a HIRF module (6), • a mechanical chassis (4). All sockets are equipped with specials caps. Figure 1 – AHV1600 Transceiver GRAPHIC 34-42-61-991-001-A01 34-42-61 Page 2 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC (1) Main connector TABLE 34-42-61-992-018-A01 CONTACT N° SIGNAL NAME 1 RA_EMIS_CMD 2 M_GND 3 TMS 4 CALIB_TEST 5 FCT_TST 6 TST_INH 7 CTZ_SEL2 8 TCK 9 TX429_HI_1 10 TX429_LO_1 11 SPP1 12 CTZ_SEL_P 13 TX429_HI_2 14 RX429_LO_2 15 MAINT 16 AID2 17 P28V_1 18 P28V_2 19 RET28V_2 20 AID_P 21 RS232_RX 22 RS232_TX 23 AID0 24 AID1 25 TDI 26 CTZ_SEL1 27 TDO 34-42-61 Page 3 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC CONTACT N° SIGNAL NAME 28 SEARCH_TRACK 29 EXTRAPOL_TEST 30 RET28V_1 31 FB_TEST 32 VALDDS_TEST 33 E_GND 34 SDI_SEL 35 DDS_TEST 36 CTZ_1 37 CTZ_2 (2) Identification The identification label and the amendment label are stuck on the bottom of the transceiver. Figure 2 – Identification labels GRAPHIC 34-42-61-991-002-A01 34-42-61 Page 4 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC The specific label is stuck on the front panel. Figure 3 – Specific and amendment label GRAPHIC 34-42-61-991-003-A01 The identification labels have the information that follows: Figure 4 – Identification labels GRAPHIC 34-42-61-991-004-A01 34-42-61 Page 5 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC The amendment plate has the information that follows: Figure 5 – Amendment label GRAPHIC 34-42-61-991-005-A01 (3) Characteristics (a) Physical characteristics - Dimensions: 190 x 90 x 95 mm (7.48 x 3.54 x 3.74 in) - Weight < 2 kg (4.4 lb) (b) Functional characteristics - Transmission: FM/CW - Frequency range: 4.2 GHz to 4.4 GHz - Frequency Deviation: 123 MHz typical - Height accuracy: +/- [2 ft + 2%(h)] at 2 - Transmitted Power: + 18 18dBm dBm(63 mW) max max typical. typical - Power supply: 28 Vdc - Power consumption: 20 W max (18 W typical) - RS-232 maintenance line - Interface: ARINC429 low speed (4) Environmental conditions (a) Vibration 2 - 0.01g /Hz over the frequency range: 20 Hz to 2 kHz, during 45 minutes per axis (b) Shock - Operational shock and crash safety: 6 g/11 ms ; 15 g/11 ms (c) Temperature - Operating temperature: - 40°C to + 70 °C (- 40 °F to + 158 °F) - Power-up limited at: - 40°C (- 40°F) - Ground survival high temperature: + 85°C (+ 185 °F) - Ground survival low temperature: - 55°C (- 67 °F) - Temperature variation: 5°C/min (9°F/min) (minimum) (d) Humidity and water trickle 34-42-61 Page 6 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC - Relative humidity: 95% with temperature of 50°C (122 °F), during 48 hours (e) Electromagnetic environment compatibility MIL-STD-461E: - CE102 - CS101, CS114, CS116 - RE101, RE102 - RS101, RS103 TASK 34-42-61-870-802-A01 2. OPERATION A. Functional architecture of the AHV1600 The general architecture of the AHV1600 is the following: SRU RADIO Receive GVA Micro Digital signal Filter Amplifier ADC Processor processor HF Ampli BF Ampli FPGA Radio Video Control PROM BUS Delay 128 % Phase Loop TCXO RAM HF Ampli Power Transmit PWM VCO Synthetiser Control Filter Generator 4.2/4.4 GHz Peripheral Sawtooth PWM modulation control Power management control Radio module Digital/management board Mother_IO board Arinc Drivers Power supply stage Power central Discretes HIRF module +5V +15V -15V EEPROM PIN Prog SRU DIGITAL CHASSIS Figure 6 – General architecture of the AHV1600 GRAPHIC 34-42-61-991-006-A01 The AHV1600 transceiver has: 34-42-61 Page 7 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC - Radio module: regroups the microwave transmitter and receiver, and the analog treatment of the beating frequency. The Digital Management board commands and monitors the radio module. It provides the Digital Management board with the beating frequency signal. It receives its power from the Power Supply (PS) stage. The Field Programmable Gate Array (FPGA) commands the radio module. - Digital Management board: commands and monitors the transmission function of radio module and the height output function as well. It computes the height out of the beating frequency and the modulation shape of the effectively transmit frequency. - Power Supply (PS) stage: provides the system with its needed power and Digital Management board with a status containing the results of power supply stage internal monitoring. - Mother IO board: links the 4 other modules, the digital signals are adapted to their analog requirements and vice versa. It reads the discrete inputs and pin-programs status and communicates them to the Digital Management board. It also formats and sends the words on the height buses according to the information received from Digital Management functions. - HIRF module: The HIRF part is not controlled (only passive components), protect the system from electromagnetic interferences and lightning. B. Operation of the SRU Radio module The SRU Radio module corresponds to the radio module controlled by a FPGA (1) Radio module The Radio module has the functions that follow: (a) Reception filter provides protection from interferences received through the antennas by the unit. (b) Transmission filters transmits the FM/CW (Frequency Modulated/Continuous Wave) signal. (c) Demodulation: it is a mixer that provides the AHV1600 transceiver with the BF (Beat Frequency) from the received RF (Radio Frequency) signal and a part of the transmit signal. (d) BF calibration is used during calibration. It filters and amplifies the BF signal. (e) BF filter determines the BF observation bandwidth of the AHV1600 transceiver. (f) GVA amplifier ("Gain Variable avec l'Altitude" variable gain with the height) is piloted by the management function according to the theoretically expected signal level at the current height. It is followed by an AGC (Automatic Gain Control) to adapt the signal level to the A/D (Analog to Digital) converter. (g) BF filter is the FM/CW digital synthesizer that feeds the PLL (Phase Lock Loop) in the MW (MicroWave). The digital synthesis is performed according to the commands received from the management function. An external Digital to Analog Converter followed by a filter is used to effectively pilot the MW calibration function of the PLL. 34-42-61 Page 8 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC (h) BF calibration is the FM/CW digital synthesiser that feeds the PLL of transmitter function in the MW. The digital synthesis is performed according to the commands received from the management function. An external Digital to Analog Converter followed by a filter is used to effectively pilot's the transmitter function's PLL. (2) FPGA The radio module FPGA is the core of the radio module. The FPGA functions are time independent: operations are begun and ended by a clock front to enable a fully deterministic time analysis. To avoid interferences with the FPGA control function no programmable cell is used as a memory. The figure that follows presents the relationships between the FPGA and the others function of the radio module. 256 MHz MNV Osc Freq_Syn B CNA U F CPU Bus Freq_Cal F CNA E PWM_Cmd PWM FPGA Serial Comm Source Cmd Source Checks GVA & BF Selection Aux BF Digital Receiver BF MWV BF Out BF Amplifier BF Cal Figure 7 – General architecture of the FPGA GRAPHIC 34-42-61-991-007-A01 The radio module FPGA has the functions that follow: 34-42-61 Page 9 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC - Clock and Bus Control Unit allows the internal clock signals generation, the management of the both bidirectional buses, CPU bus and AD6620 bus. - CPU decoding unit performs the addresses decoding for the registers accesses in read and write mode. - FPGA Registers Unit contain all the internal registers and their various accesses. - Debug and Monitoring Unit allows a stand alone control of the radio module by the mean of a terminal for debugging and set-up. When the radio module is controlled by the CPU, a monitoring mode is allowed. - EEPROM Control Unit performs the NVM (Non Volatile Memory) control in read and write mode. - Frequency Synthesis Unit includes: Reference frequency Freq_Syn samples generation Delayed frequency Freq_Cal samples generation Sawtooth modulation control providing the logical signals reflecting the modulation duration and BF samples validation Modulation duration computation - Transmit and Receive Configuration Unit controls the transmission sequencing in the different modes, the signals to the microwave part. - PWM Control Unit generates the Power Management voltage - GVA Control Unit controls the GVA A/D convertor. C. Operation of the SRU Digital chassis The SRU Digital chassis has the modules that follow: - Mechanical chassis, - Mother I/O stage, - HIRF module, - Power Supply (PS) stage, - Digital Management board. (1) Mechanical chassis It is the mechanical host of the AHV1600 transceiver. (2) Mother I/O board It has the functions that follow: - Discrete inputs/outputs, pin programming - Height buses. 34-42-61 Page 10 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

COMPONENT MAINTENANCE MANUAL P/N 61778974AC - The I/O interface function reads the discrete inputs and pin-programs status and communicates them to the Digital Management board. It also formats and sends the words on the height buses according to the information received from Digital Management functions. (3) HIRF module It has the EMI (Electro Magnetic Interference) filter function. The EMI filters protect the others modules, from all the specified EMI and especially vs. HIRF (High Intensity Radiated Field) and the indirect effects of lightning. This module has only passive components. (4) Power supply (PS) stage It has the functions that follow: - 28 V function: it is mainly an integrated converter, which supplies, on isolated wires, the other modules of the SRU with 5 V and 15 V voltage - Power Supply control function: it controls the converter. The results of this monitoring are sent to the Digital Management board. (5) Digital management board It is the core of the AHV1600 transceiver and its processing channel. It has one 68340 processor and one DSP 320C50 processor. It has the functions that follow: (a) Management function It computes the height from the data received of the signal treatment function. It realizes BIT (Built In Test) of the whole unit. It manages the search/track stage of the AHV1600 transceiver. It manages the operational/test/calibration modes of the AHV1600 transceiver. It pilots the synthesiser and GVA (Gain variable with the height) functions. (b) Signal treatment function It performs the basic signal treatment on the BF samples, extracts from the obtained BF spectrum the relevant parameters and sends them to the management function. It is mainly a software component embedded in DSP (Digital Signal Processor). (c) A/D conversion function It is an A/D converter. From the BF signal it obtains its samples and sends them to the signal treatment function. 34-42-61 Page 11 2009/06/25 ©THALES Communications S.A. This document and any data included are the property of THALES Communications. They cannot be reproduced, disclosed or utilised without the company's prior written approval. Temporary revision

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Document Created: 2009-12-01 17:47:16
Document Modified: 2009-12-01 17:47:16
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