Issue: 1 Rev: 00 )ATLID -...

Ref.: EC.RS.ASF.ATL.00057 Issue: 1 Rev: 00

) ATLID Date: 17/12/2010 of 36

Title

ATLID INSTRUMENT ACDM 1 BSME Electrical Interface Specification

CI CODE: ACDM DRL Refs : D-SA2

Name and Function Date Signature

Prepared by

Checked by:

D. Pibrac

Electrical and operations architect

L. Le Hors

System Engineering Manager

Approved by: P. Thoral

PA Manager

Authorised by: Y. Toulemont

Project Manager

Application Authorised by:

Document Autogenerated tram DOORS Module: IEarthCARE/L-4_SubCo Area/ATLID Equipment/1.6 Electrical Units/ACDM-BSME Electrical Interface

Specification

ACDM-BSME Is.01.doc


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The copyright in this document is the property of EADS ASTRIUM SAS and the contents may not be reproduced or revealed to third parties without prior permission of that company in writing. © EADS Astrium

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CONTENTS

1 INTRODUCTION AND SCOPE ............................................................................................................7 1.1 INTRODUCTION ...............................................................................................................................7 1.2 SCOPE ..............................................................................................................................................8

2 DOCUMENTS .......................................................................................................................................9

3 DEFINITIONS......................................................................................................................................10 3.1 Acronyms.........................................................................................................................................10 3.2 DATA numbering conventions.........................................................................................................11

4 INTERFACE CIRCUIT : DESIGN RULES .......................................................................................12

5 OVERVIEW .........................................................................................................................................13 5.1 OVERVIEW OF OPERATION .........................................................................................................13 5.2 OVERVIEW OF ELECTRICAL I/F...................................................................................................13 5.3 CROSS-STRAPPING PRINCIPLE..................................................................................................13 5.4 OVERVIEW OF ELECTRICAL I/F (with Cross-strapping) ..............................................................14

6 ELECTRICAL INTERFACE REQUIREMENTS...................................................................................16 6.1 Discrete TM/TC................................................................................................................................16

6.1.1 Relay Commands ................................................................................................................16 6.1.2 Direct Acquisitions ...............................................................................................................16

6.2 TM/TC SERIAL LINK DEFINITION .................................................................................................19 6.2.1 Serial link signal detailed definition......................................................................................19 6.2.2 Cross-strapping principle .....................................................................................................20 6.2.3 Circuit implementation .........................................................................................................21 6.2.4 PROTOCOL DEFINITION ..................................................................................................21

6.3 SPECIFIC SIGNALS........................................................................................................................24

7 MANAGEMENT OF DATA & SIGNALS BETWEEN ACDM AND BSA ...........................................25 7.1 MANAGEMENT OF DATA on SERIAL LINK ..................................................................................25

7.1.1 TM/TC management............................................................................................................25

8 ANNEX 1 : BASIC PROTOCOL..........................................................................................................26 8.1 BASIC PROTOCOL FOR Memory Load (ML) COMMANDS.........................................................26 8.2 BASIC PROTOCOL FOR Serial Digital 16 bits (DS16) Telemetry .................................................28

9 ANNEX 2 : TM/TC SERIAL LINK PROTOCOL BETWEEN ACDM & BSME ...................................31 9.1 DIGITAL COMMANDS ....................................................................................................................31

9.1.1 Calibration curve for BSME sub-mode parameter...............................................................32 9.2 DIGITAL TELEMETRIES.................................................................................................................32

10 ANNEX 3 : CONNECTORS & PIN FUNCTION ..................................................................................34 10.1 CONNECTORS AT ACDM..........................................................................................................34 10.2 CONNECTORS AT BSME ..........................................................................................................34


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TABLES Table 6.1-1: Temperature Acquisition Type 2 Source Specification ..............................................................18 Table 6.1-2: Temperature Acquisition Type 2 Receiver Specification ............................................................18 Table 6.2-1: Driver and receiver implementation at ACDM and BSME level. .................................................21 Table 8.1-1: MEMORY LOAD (ML) COMMAND SWITCHING TIMES..........................................................27 Table 8.2-1: DS16 (SERIAL 16 BIT ACQUISITION) SIGNAL DURATIONS AND SWITCHING TIMES........29

FIGURES Figure 1.1-1: EarthCARE Satellite Configuration ..............................................................................................7 Figure 5.3-1: Principle of Cross Strapping between ACDM and BSME (Drivers and Receiver names).........14 Figure 5.4-1: Overview of Electrical Interfaces between both ACDM and BSM-E Nominal ...........................14 Figure 6.2-1: Overview of TM/TC serial link between ACDM and BSME .......................................................20 Figure 6.2-2: Specific Protocol CMD for single COMMAND loading...............................................................22 Figure 6.2-3: Telemetry acquisition protocol between ACDM and BSME (for TM1block) ..............................23 Figure 6.3-1: Driver and receiver implementation at ACDM and BSME level.................................................24 Figure 8.1-1: MEMORY LOAD (ML) COMMAND : SIGNAL WAVEFORM DIAGRAM ...................................27 Figure 8.2-1: DS16 (SERIAL 16 BIT ACQUISITION) SIGNAL : SIGNAL WAVEFORM DIAGRAM...............30 Figure 9.1-1: Detailed list of BSME commands: TBC ...............................................................................32 Figure 9.2-1: Detailed list of TM_BSA block .............................................................................................33


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SUMMARY

In the frame of ATLID Instrument, this specification defines the Electrical Interface requirements for the BSA subassembly (through electronic management unit BSME) and ACDM.


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1 INTRODUCTION AND SCOPE

1.1 INTRODUCTION

This document establishes the electrical interfaces, the performances, the specific protocols of communication on serial links and the management requirements between ACDM (ATLID Control and Data Management) and BSME (Beam Steering Mechanism Electronics ) unit, whose Flight Models will be embarked for the ATLID Instrument onboard the EarthCARE Satellite.

Earth Explorer Core Missions are an element of the Earth Observation Envelope Programme. They are defined as major missions led by ESA to cover primary research objectives set out in the Living Planet Program (ESA, 1998). The Earth Clouds, Aerosols and Radiation Explorer Mission (EarthCARE) has been approved for implementation as the third Earth Explorer Core Mission.

EarthCARE is a cooperative mission between ESA and JAXA, where JAXA will provide a Cloud Profiling Radar. ESA is responsible for the entire system including the Spacecraft, three instruments, the Launcher and the Ground Segment.

The EarthCARE Mission will help in determining the Earth radiation budget by providing global observations of vertical cloud and aerosol profiles. The mission is centred on the synergetic use of the data provided by an instrument suite consisting of an ATmospheric LIDar (ATLID), a Cloud Profiling Radar (CPR), a Multi-Spectral Imager (MSI) and a Broad Band Radiometer (BBR).

Figure 1.1-1: EarthCARE Satellite Configuration

•General Design and Interface Requirements are no more grouped in a specific document, but are directly included in the ACDM and BSA Requirements Documents


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1.2 SCOPE

The document in hand comprises the contractually relevant requirements and constraints for the ATLID ACDM-BSME Electrical Interfaces, including the performance as well as design and interface requirements of subject hardware,

•the testing and verification requirements are covered by the main unit specifications, RD-1 and RD-2

Requirements within this document are shown in an italic font. Each requirement is preceded by a summary line that contains the following fields, delimited by "/".

•Doors Requirement Number

•Intended Verification Method

•Created From

as shown here after

EIF1-11 / T,A / Upper links or Created

Requirement text

The Doors Requirement Number has the form Prefix-xxx where xxx is a unique number assigned consecutively

The Intended Verification Method codes are as follows:

•R - Review

•A - Analysis

•I - Inspection

•T - Test

The Created from information is used for upper link information (identify which customer requirement requirements are derived from ).

When a requirement has no straight upper link, Created from is filled with “created”.

The requirement text follows the summary line. If tables are considered as part of requirement they are referenced clearly in the text and inserted after and separated from the requirement and are managed as free text attached to the identifier requirement.

All document elements not presented in the format explained above are not requirements and will not be verified or tracked.


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2 DOCUMENTS

Refer to Documents listed in dedicated Statement Of Work (SOW).

Note : The applicable General Design and Interface Requirements (GDIR) are located inside the units requirements specification documents (chapter 7 for ACDM requirement specification, 24 for BSA specification).

RD-1 ACDM Technical Requirements EC.SP.ASF.ATL.00029

RD-2 Atlid Instrument BSA Specification EC.RS.ASF.ATL.00063


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3 DEFINITIONS

3.1 Acronyms


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ACDM ATLID Control and Data Management Unit AS16 Acquisition Serial 16-bit BNR Bus Non Regulated BSA Beam Steering Assembly (= BSM + BSE + BSH) BSCE Beam Steering Control Electronics (part of BSE) BSDE Beam Steering Drive Electronics (part of BSE) BSE Beam Steering Electronics BSFE Beam Steering Front End Electronics (part of BSE) BSFE-S BSFE-Support BSH Beam Steering Harness BSHe Beam Steering Harness : External BSHf Beam Steering Harness : Feedthrough BSHi Beam Steering Harness : Internal BSHp Beam Steering Harness : Proximity BSIE Beam Steering I/F Electronics (part of BSE) BSM Beam Steering Mechanism BSME Beam Steering Mechanism Electronics BSME-S BSME-Support BSM-S BSM-Support BSPE Beam Steering Power Electronics (part of BSE) BSSE Beam Steering Sensor Electronics (part of BSE) CS16 Command Serial 16-bit CTE Coefficient of Thermal Expansion DOF Degree Of Freedom ICD Interface Control Document IF Interface LAT Lot Acceptance Test LCL LID Laser Induced Damage LOS Line Of Sight LT Long Term LVDS Low Voltage Differential Signaling M-ANG Mechanical Angle at BSM level ML Memory Load MSB Most Significant Bit MT Mid Term NA or N/A Not Applicable O-ANG Optical Angle at BSM level O-ANG-EXT Optical Angle at PLH level OMG Opto-Mechanical Gain PFM Proto Flight Model PLH Power Laser Head PTV Peak To Valley (so-called ‘peak-to-peak’) QM Qualification Model SP Set Points SP Set-point ST Short Term TBC To Be Confirmed TBC To Be Confirmed TBD To Be Defined TBD To Be Determined TC Telecommand TM Telemetry TRP Temperature Reference Point TSB Telescope Support BasePlate WFE Wave Front Error ZTP Zero To peak

3.2 DATA numbering conventions

See GDIR


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4 INTERFACE CIRCUIT : DESIGN RULES

EIF1-27 / R /

The design of any signal interface shall ensure that the interface is not susceptible to noise specified and that the noise it generates is compatible with the emission requirements.

EIF1-28 / R /

TWO wire interface shall be used : all electrical links between the instrument units shall be performed by either differential, or galvanic insulation (relay, optocoupler,...) interfaces.

Use of a common return for several links is not allowed.

The reference point(s) for these lines will be defined in such a way to avoid interference loops. Moreover, a return line will not be connected to the mechanical ground at both ends but will be referenced to one point, generally at transmitter level.

EIF1-29 / R /

Signals outputs shall be referenced to box structure or ground plane :

- for single ended output, referencing to structure is via the secondary power / signal ground

- for differential output, referencing to structure is via the driver output impedance.

EIF1-30 / R /

Analogue and digital circuits shall be designed to respond only to intentional frequency bandwidths. Filtering shall be used at the receiver inputs to reject both differential and common mode unwanted signals.

EIF1-31 / R /

Transmission bandwidths shall be limited to the minimum necessary bandwidth.

EIF1-32 / R /

Interface circuit not powered :

When not powered, the receiver shall withstand any transmitter characteristics without damages and stress.

When not powered, the transmitter shall withstand any receiver characteristics without damages and stress.

EIF1-33 / T,R /

The users shall support without damages and stress, single failure cases leading to the following conditions :

- 1 or several signals are absent,

- frequency change.

EIF1-34 / T,R /

The implementation of the interface signals shall correspond to the types whose characteristics are described in the GDIR or in the present document


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5 OVERVIEW

5.1 OVERVIEW OF OPERATION

The BSA is part of the Laser Transmitter path, but it is managed by the ACDM. It will correct the line of sight of the transmitter in function of the orders generated by the Coalignment Loop in the ACDM software, that keeps the return optical signal inside the field of view of the instrument, as detected by the coalignment sensor.

When the instrument goes to INS-IDL or INS-OPE mode (TBC in the operation procedures), the BSME is powered by the ACDM discrete command. The mechanism is at its mechanical zero.

Then the BSA is put (via a serial command from ACDM) in Closed Loop Mode, that is its operational mode, ready to receive the 2 absolute angular setpoints. The local loop aligns the actual position of the mechanism to the position defined by the angular setpoints. Until the reception of the first angular commands it stays at its electrical zero.

After a calibration phase where the BSA is pointed step by step to fixed positions, the coalignment algorithm will send regularly new pointing setpoints to the BSME.

Note: a specific BSA open loop mode is also available for ground operation purpose (or in flight investigations via direct commanding). In this mode, we may send the current or voltage setpoints directly in open loop to the actuators. This local open loop is different from the "Coalignment loop" that may be started or stopped and that is localised in the ACDM.

5.2 OVERVIEW OF ELECTRICAL I/F

The Electrical I/F between ACDM and BSME are shown in Figure 5.4-1

The BSME interfaces (wrt ACDM) may be summarised as follows:

•TM/TC serial links : Serial links for digital TM/TC

•On / Off commands :

- ACDM will generate discrete ON/OFF commands for Power Bus switching.

•Discrete telemetries :

- ACDM will acquire 6 discrete telemetries : 1 primary current, 1 secondary voltage, 1 ON/OFF status for LPB, and 3 temperatures.

•Status signals :

- ACDM will acquire 1 status signal generated by BSME : FAIL_BSA

•Power: the BSME is connected directly on the satellite Non Regulated Bus

5.3 CROSS-STRAPPING PRINCIPLE

Cross-strapping is used for some functions between the ACDM and BSME. It is based on the principle given in Figure 5.3-1.

Note that there is no cross-strapping between BSME and TXA. The selection of a TXA N or R implies the use of the attached mechanism, with its own electronics. So that the redundancy of BSME is the same as for TXA.


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A A

A B

1 1

1 2

A C D MA

B S M E1

B A

B B

2 1

2 2

A C D MB 2

A C D M

B S M E

Figure 5.3-1: Principle of Cross Strapping between ACDM and BSME (Drivers and Receiver names)

This principle concerns the SBDL I/F (TM/TC serial link, synchro signals, clocks) for which Drivers and Receiver names are given for ACDM and BSME)

5.4 OVERVIEW OF ELECTRICAL I/F (with Cross-strapping)

An overview of Electrical I/F between BSME Nominal and both ACDM is depicted in Figure 5.4-1. The same scheme applies for BSME redundant.

FAIL_BSME STATUS signals

ON / OFF Commands(Power Pulses)BSME Nom

O N commandBSME Nom

OFF comma nd

Pri mary CurrentDirect Telemetries

Se condary Volta ge Temperature

BSME On/Off Status

STATUS signals

ON / OFF Commands(Power Pulses) BSME N om

ON command BSME N om

OFF c ommand

Pri mary CurrentDirect Telemetries

Secondary Volta ge

Tempera ture BSME On/Off Status

FAIL_BSME

BSM-E

Power Bus (BNR)

ML / DS16

HS16MCS16MAS16DCS16

Address

ACDM NOMINAL

ML / DS16

HS16 DCS16

ACDM

Address

Serial link

DA S16

NOMINAL

Serial link

REDUNDANTMCS16MAS16 DAS16

Figure 5.4-1: Overview of Electrical Interfaces between both ACDM and BSM-E Nominal


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6 ELECTRICAL INTERFACE REQUIREMENTS

6.1 Discrete TM/TC

6.1.1 Relay Commands

EIF1-59 / R /

The ACDM Nominal shall deliver 4 commands towards BSA:

•1 command to Switch ON the Nominal BSME

•1 command to Switch OFF the Nominal BSME

•1 command to Switch ON the Redundant BSME

•1 command to Switch OFF the Redundant BSME

EIF1-60 / R /

The ACDM Redundant shall deliver 4 commands towards BSA :

•1 command to Switch ON the Nominal BSME

•1 command to Switch OFF the Nominal BSME

•1 command to Switch ON the Redundant BSME

•1 command to Switch OFF the Redundant BSME

EIF1-61 / T,R /

At ACDM level, the Electrical Interface of the driver shall be the one specified for “SHP” in GDIR.

EIF1-62 / T,R /

At BSME level, the Electrical Interface of the receiver shall be the one specified for “SHP” in GDIR

EIF1-63 / R /

At BSME level, the OR between commands arriving from ACDM Nominal and ACDM redundant shall be as defined in GDIR § "Redundancy and Cross-Strapping"

6.1.2 Direct Acquisitions

6.1.2.1 Relay Status (RS)

EIF1-66 / R /

The ACDM Nominal shall receive 2 relay status from BSME

•1 status from Nominal BSME for On/Off observ.

•1 status from Redundant BSME for On/Off observ

EIF1-67 / R /

The ACDM Redundant shall receive 2 relay status from BSME

•1 status from Nominal BSME for On/Off observ.

•1 status from Redundant BSME for On/Off observ

EIF1-68 / T,R /

At ACDM level, the Electrical Interface of the receiver shall be the one specified for “RELAY STATUS (RSA)” in GDIR.


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EIF1-69 / T,R /

At BSME level, the Electrical Interface of the driver shall be the one specified for “RELAY STATUS (RSA)” in GDIR

6.1.2.2 Temperature Acquisition (TA)

EIF1-71 / R /

The ACDM Nominal shall receive 6 Temperature acquisitions (TA) from BSME

•1 from Nominal BSME for temperature observability

•1 from Nominal BSFE for temperature observability

•1 from Nominal BSM for temperature observability

•1 from Redundant BSME for temperature observability

•1 from Redundant BSFE for temperature observability

•1 from Redundant BSM for temperature observability

EIF1-72 / R /

The ACDM Redundant shall receive 6 Temperature acquisitions (TA) from BSME

•1 from Nominal BSME for temperature observability

•1 from Nominal BSFE for temperature observability

•1 from Nominal BSM for temperature observability

•1 from Redundant BSME for temperature observability

•1 from Redundant BSFE for temperature observability

•1 from Redundant BSM for temperature observability

EIF1-73 / T,R /

At ACDM level, the Electrical Interface of the receiver shall be the one specified for “TEMPERATURE ACQUISITION type 2” in GDIR,

Option 2 ANP (PT 1000 sensor conditioning)

for [ -50°C ; 100 °C ] observability

EIF1-74 / T,R /

At BSME level, the Electrical Interface of the driver shall be the one specified for “TEMPERATURE” in GDIR, Option 2 (PT 1000 sensor)

6.1.2.2.1.1 Temperature Acquisition Type 2: PT-1000 (ANP) Interface

EIF1-76 / T,R /

The contractor shall design his side of the interface to be compliant to the characteristics as defined in Interface Datasheet "ANP", Table 6.1-1 and Table 6.1-2 below.


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INTERFACE DATA SHEET Page 1 / 2

IF Designation: Temperature Acquisition Type 2: PT-1000 IF-Code: ANP Req Driver Circuit Specification Ver. Iss.

-1 Circuit Type Thermistor PT1000 (1KOhm @ 0°C), two wire connection

-2 Transfer DC coupled -3 Operating temp range -160°C to +150 deg C -4 Fault voltage tolerance -16.5V to +16.5V A -5 Fault voltage emission Not applicable A

Table 6.1-1: Temperature Acquisition Type 2 Source Specification

INTERFACE DATA SHEET Page 2 / 2

IF Designation: Temperature Acquisition Type 2: PT-1000 IF-Code: ANP Req Receiver Circuit Specification Ver. Iss.

-6 Circuit Type Conditioning circuitry -7 Transfer DC coupled -8 Measurement range -160°C to +140°C (equivalent to 344.6 Ohm to 1542.6

Ohm)

-9 Resolution at least 0.2 K / LSB -10 Measurement chain accuracy better than +/-3 K -11 Measurement current ≤ 300 µA (permanent) -12 Acquisition rate consecutive and different acquisitions every 128 µsec

with full performance

-13 Receiver bandwidth: ≤ 350 Hz @ 3dB -14 Fault voltage tolerance: -14V to +14V A -15 Fault voltage emission: -16 V to +16 V (through 1.5 KOhms) A Harness Specification -16 Wiring Type: Twisted Shielded Pair (TSP) R -17 Shielding: Shield at backshell on driver and receiver side R Notes:

Fault Voltages shall be verified by Worst Case Analysis.

Table 6.1-2: Temperature Acquisition Type 2 Receiver Specification

6.1.2.3 Housekeeping Analogue Acquisition (ANA)

EIF1-82 / R /

The ACDM Nominal shall receive 4 Housekeeping Analogue Acquisition from BSME

•1 from Nominal BSME for primary current observ.

•1 from Nominal BSME for secondary voltage observ.


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•1 from Redundant BSME for primary current observ.

•1 from Redundant BSME for secondary voltage observ

EIF1-83 / R /

The ACDM Redundant shall receive 4 Housekeeping Analogue Acquisition from BSME

•1 from Nominal BSME for primary current observ.

•1 from Nominal BSME for secondary voltage observ.

•1 from Redundant BSME for primary current observ.

•1 from Redundant BSME for secondary voltage observ

EIF1-84 / T,R /

At ACDM level, the Electrical Interface of the receiver shall be the one specified for “ANALOG acquisition” in GDIR, Specification n° AN2 (“0” to “5V” conditioning)

EIF1-85 / T,R /

At ACDM level, the Electrical Interface of the driver shall be the one specified for “Housekeeping ANALOG acquisition” in GDIR, Specification n° AN2 (“0” to “5V” signal)

EIF1-86 / T,R /

At BSME level, the calibration curve shall insure that the maximum value (Voltage, current) can be observed without any saturation.

6.2 TM/TC SERIAL LINK DEFINITION

A serial link is used between ACDM and BSME for TM/TC exchanges : 16-bit words can be exchanged through this link.

It is used to send the angular commands from the ACDM coalignment algorithm to the BSM-E, and to acquire the angular telemetry from the BSM sensors, and also all the available internal telemetries of the system.

ACDM is MASTER on this serial link and BSM-E is the SLAVE. Serial link is half duplex

Telecommands are transmitted from ACDM to BSM-E using the following signals : HS16, MCS16, DCS16, ADDRESS

Telemetries are transmitted from BSM-E to ACDM using the following signals : HS16, MAS16, DAS16

6.2.1 Serial link signal detailed definition

EIF1-94 / T,R /

Clock line (HS16) :

For each 16-bit word transfer (ML or AS16), 16 pulses are generated on this line.

When there is no transfer, this signal shall be in the logical state "1".

The frequency of this clock is defined in annex 1

EIF1-95 / T,R /

Sampling for CS16 (MCS16) :

This line defines the time when a 16-bit data word from MASTER to SLAVE is transmitted.

When there is no data transfer, this signal shall be in the logical state "1".

When active, this signal shall be in the logical state "0".


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EIF1-96 / T,R /

Data for CS16 (DCS16) :

This line is used to transfer 16-bit data words from MASTER to SLAVE.


EIF1-97 / T,R /

Sampling for AS16 (MAS16) :

This line defines the time when a 16-bit word from SLAVE to MASTER is transmitted.


When active, this signal shall be in the logical state "0".

EIF1-98 / T,R /

Data for AS16 (DAS16) :

This line is used to transfer 16-bit data words from SLAVE to MASTER.

When there is no data transfer, this signal shall be in the logical state "0".

EIF1-99 / T,R /

Address (ADDRESS) :

This line is used during a 2 consecutive 16-bit transfer from master to slave. It indicates to slave if the data transmitted is a 16-bit register address (signal shall be at “1” level during first word transmission) or a 16-bit data (signal shall be at “0” level during second word transmission)

ACDM BSME

ADDRESS

MCS16

DCS16

HS16

DAS16

MAS16

Commandloading

Telemetryreading

D R

D DRIVER R RECEIVERLEGEND

D

D

D

D

R

R

R

R

R

D

Figure 6.2-1: Overview of TM/TC serial link between ACDM and BSME

6.2.2 Cross-strapping principle

EIF1-103 / R /

ACDM and BSME shall fulfil the cross-strapping principle defined in Section 5.3.

Protection & Immunity shall comply with GDIR.


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6.2.3 Circuit implementation

EIF1-105 / R /

The circuit implemented in the MASTER unit (ACDM) or in the SLAVE unit (BSME) shall be as defined in the Table 6.2-1

INTERFACE Type at MASTER level

(ACDM) at SLAVE level

(BSME) Clock line

(HS16) DRIVER

(see unit spec § GDIR “SBDL Link”)

RECEIVER (see unit spec § GDIR

“SBDL Link”) Sampling for

CS16 (MCS16)

DRIVER (see unit spec § GDIR

“SBDL Link”)


“SBDL Link”) Data for CS16

(DCS16) DRIVER



“SBDL Link”) SIGNAL Sampling for

AS16 (MAS16)


“SBDL Link”)


“SBDL Link”) Data for AS16

(DAS16) RECEIVER



“SBDL Link”) Address line

(ADDRESS) DRIVER



“SBDL Link”)

Table 6.2-1: Driver and receiver implementation at ACDM and BSME level.

6.2.4 PROTOCOL DEFINITION

EIF1-109 / T,R /

The following specific protocol shall be used between ACDM and BSME :

- Specific Protocol “CMD” (COMMAND loading) :

To load a single data, there will be 2 consecutive ML commands :

• First ML : it indicates the register address to be loaded (BASIC ML protocol in EIF1-150) during which the ADDRESS line is at High level

• Second ML : it contains the data to be loaded in the register. (BASIC ML protocol in Annex 1)

- Specific protocol for Telemetry reading :

To sample a block data of “N” data, the following protocol shall be applied

• a CMD protocol with a given Address in the first ML word (Specific CMD protocol)

• a set of “N” DS16 consecutive acquisition (BASIC DS16 protocol in EIF1-150)

EIF1-110 / T,R /

Protocol and timings for BASIC protocols : ACDM and BSME shall fullfill the timings as defined in Annex 1.


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EIF1-111 / T,R /

During a basic ML command protocol, ACDM shall insure that it shall not be possible to have simultaneous emissions on the lines dedicated to DS16 protocol (MAS16 and DAS16).

EIF1-112 / T,R /

During a basic DS16 protocol, ACDM shall insure that it shall not be possible to have simultaneous emissions on the lines dedicated to ML protocol (MCS16 and DCS16).

6.2.4.1 Protocol for Command loading (CMD)

The principle of the protocol consist in 2 ML commands :

1 ML (called "C1") which contains the ADDRESS of the register to be loaded

1 ML (called "C2") which contains the DATA for the register to be loaded

EIF1-117 / T,R /

Specific Protocol CMD :

ACDM and BSME shall fulfil the protocols defined in Figure 6.2-2

Where “t3” represents a timing defined in BASIC protocols for ML commands (Refer to EIF1-150)

EIF1-118 / /

ACDM and BSME shall fulfil the following timing constraints :

2 µsec < T1 : < 4 µsec

T2 = 0

40 µsec < T3 < 50 µsec

HS16

MCS16

DCS16

MAS16

DAS16

ADDRESS

T1 T3

t3t3

ML commandBasic

Protocol

T2

ML commandBasic

Protocol

"0"

"1"

"1"

"1""0"

"0"

"1""0"

NOT USEDfor

CMD protocol

Figure 6.2-2: Specific Protocol CMD for single COMMAND loading


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6.2.4.2 Protocol for TELEMETRY acquisition

One protocol with max 40 acquisition is foreseen . It is called :

•Protocol TM1 (40 DS16 acquisitions)

EIF1-293 / /

This protocol shall be activated at 1Hz

6.2.4.2.1 Protocol TM1

EIF1-125 / T,R /

Telemetry acquisitions shall be acquired according to the protocol defined in Figure 6.2-3 :

A CMD specific protocol is followed by 40 DS16 basic protocols

Where : ta = Time between CMD and 1rst DS16 protocol

tb = Time between 2 DS16 protocols

10 µsec ≤ ta ≤ 40 µsec

10 µsec ≤ tb ≤ 20 µsec

EIF1-126 / A,R /

When a Telemetry acquisition protocol is initiated, it is performed up to the last Telemetry

The total duration shall then lower than 5,6 msec.

[ T1+T3+2*t1 (CMD) + ta + 40 DS16 (2*t1 + tb) ]

Note : « t1 » is defined in Section 8_

MCS16

HS16

MAS16

DAS16

SD1

ta tb tb tb tb tb tb tb tb tb tb

BasicSD

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Figure 6.2-3: Telemetry acquisition protocol between ACDM and BSME (for TM1block)

6.2.4.3 TM/TC conflict management :

EIF1-130 / R /

ACDM shall manage the Serial link traffic with BSME in order to avoid conflict between “Command loading” (CMD specific protocol) and “telemetry acquisition” (block TM1)

EIF1-131 / T,R /

BSME and ACDM availability : Between 2 consecutive activities (among Command loading & telemetry acquisition), when 1 activity is elapsed,

ACDM shall be able to perform a new activity after a minimum gap of ΔT1 [(≥ 40 µsec (= ΔT1 _min) ]


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BSME shall be able to accept a new activity after a minimum gap of ΔT2 (≥ 20 µsec)

6.3 SPECIFIC SIGNALS

EIF1-133 / R /

The BSME shall send 1 CHECK signal towards ACDM

•1 signal called “FAIL_BSA” (for Failure indication)

EIF1-134 / T,R /

The “FAIL_BSA” signal characteristics shall transmit the following information :

•The LOW level shall indicate there is no detected failure

•The HIGH level shall indicate that a failure has been detected by BSME.

EIF1-135 / T,R /

When ACDM detects a HIGH level in the “FAIL_BSA” signal it shall send the command to set the BSA in STAND-BY mode.

EIF1-136 / T,R /

The circuit implemented in the ACDM and in the BSME shall be compliant to electrical characteristics of Figure 6.3-1

EIF1-137 / T,R /

ACDM and BSME shall fulfil the cross-strapping principle defined in Section 5.3.

Protection & Immunity shall comply with GDIR.

INTERFACE Type at ACDM level at BSME level

FAIL_BSA RECEIVER (see unit spec § GDIR

“SBDL Link”)


“SBDL Link”)

Figure 6.3-1: Driver and receiver implementation at ACDM and BSME level


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7 MANAGEMENT OF DATA & SIGNALS BETWEEN ACDM AND BSA

7.1 MANAGEMENT OF DATA on SERIAL LINK

EIF1-142 / T,R /

Two angular position commands shall be sent asynchronously from ACDM to BSM-E through the command loading (CMD) protocol.

Four additional commands are implemented for open loop commanding.

EIF1-143 / T,R /

Two position aquisitions shall be acquired by ACDM on BSM-E through DS16 acquisitions. The complete list of acquisitions is given at EIF1-200. The raw values from the position sensors are included in the acquisitions.

7.1.1 TM/TC management

7.1.1.1 Main principle

EIF1-146 / T,A,R /

TC generation :

As soon as the BSME is switched ON by the discrete command, any CMD command protocol (see section 6.2.4.1) can be generated at any time by ACDM (according to section 6.2.4.3) towards BSME and shall be accepted by BSME

EIF1-147 / T,A,R /

TM acquisition :

As soon as the BSME is switched ON the by discrete command, any TM block acquisition protocol (see section 6.2.4.2 & 6.2.4.2.2) can be requested at any time by ACDM (according to section 6.2.4.3) from BSME and shall be accepted by BSME

7.1.1.2 TM/TC Definition

EIF1-149 / T,A,R /

The digital TM/TC implementation shall be as proposed in Annex 2. Definition of new commands and acquisitions will be possible to comply to operation and observability requirements.


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8 ANNEX 1 : BASIC PROTOCOL

8.1 BASIC PROTOCOL FOR Memory Load (ML) COMMANDS

The purpose of the Memory Load command (or 16 bits serial load command) link is to transfer a 16 bits data word, in serial form, from a command distribution unit (MASTER) to a particular unit (SLAVE) in which the 16 bit information is needed.

EIF1-153 / R /

A serial link for ML commands between MASTER and SLAVE shall be composed with the 3 following lines :

Sample (called MCS16)

The SLAVE will be provided with a dedicated sample line managed by the MASTER. It is set to “0” level when the MASTER want to transmit a 16 bit information.

Clock (called HS16) (*)

One clock line is provided to the SLAVE. 16 of these clocks pulses are gated during the MC16 signal interval, together with 16 bits data, thus enabling the user to read the data after detection of one of its addresses. The clock pulses have a known and reliable phase relationship with the data transitions, thus ensuring reliable data read by the SLAVE.

Data (called DCS16)

MASTER delivers the data to the SLAVE.

(*) Note that, in case the serial link contains also a Digital serial telemetry, the HS16 clock can be common to both needs (ML transfer or DS16 request).

EIF1-154 / T,R /

These commands shall be delivered by MASTER and shall follow the Timings and waveforms as indicated :

•in Figure 8.1-1 for signal waveform

•in Table 8.1-1 for Timings / Switching times

Any undefined DCS16 bit pattern (bit pattern having no predefined interpretation or decoding sense at user level) shall be ignored by the addressed USER.

EIF1-155 / R /

Data transfer principle :

At USER level, the data shall be read on the DATA line on the Falling edge of the HS16 line when the USER has been addressed by the MCS16 line.

At MASTER level, the transient between 2 consecutive bits shall be done on a rising edge of the Clock.


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ACQUISITION RATE 125 Kbps (1) t1 54 t (+ t) t2 4 t (+ t) t3 104 t (+ t) t4 18 t (+ t) t5 4 t (+ 0.1 t) t6 2 t (+ 0.6t) t7 < 4 t t8 1 µsec to 2 µsec t9 > 1.5 t

A tr (rise time) 10 ns < t < 0.8 µs tf (fall time) 10 ns < t < 0.3 µs

B tr (rise time) 10 ns < t < 0.8 µs tf (fall time) 10 ns < t < 0.3 µs

C tr (rise time) 10 ns < t < 0.8 µs tf (fall time) 10 ns < t < 0.3 µs

Where : A : Sampling signal B : Acquisition clock signal C : data bit t = 2-20 s ∼ 0.98 µs Notes : (1) 125 kbps is the nominal rate (+10% setting) (2) Signals are measured when the user's interface is fully and properly connected to the memory load output (3) Pulse widths and propagation delays are measured at 50 % of full amplitude (4) Rise (tr) and fall (tf) times are measured between 10 % and 90 % of full amplitude.

Table 8.1-1: MEMORY LOAD (ML) COMMAND SWITCHING TIMES

(3)HS16

(2)MCS16

(4)DCS16

t3

t4 t9t2

t4

t5t6

t7 t8 t8

B15 B14 B13 B12 B11 B10 B9B8B7B6B5B4B3B2B1B0

BASIC ML Protocol

t9t2

t1 t1

Note (1) : Time interval corresponds to the interrogation bus interval

Note (2) : Memory load address signals to user. It corresponds to the MCS16 signal

Note (3) : Memory load transfer clock signal : acquisition clock signal. It corresponds to the HS16 signal

Note (4) : Memory load 16 bit serial data (B0 is the MSB and is transmitted first). Logical ONE corresponds to open state of switch closure interface (i.e. a positive voltage at the user’s input). It corresponds to the DCS16 signal

Figure 8.1-1: MEMORY LOAD (ML) COMMAND : SIGNAL WAVEFORM DIAGRAM


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8.2 BASIC PROTOCOL FOR Serial Digital 16 bits (DS16) Telemetry

The purpose of the serial digital acquisition link is to transfer a 16 bit data word, in serial form, from a particular user's location on-board the satellite to a command distribution unit (MASTER).

EIF1-166 / R /

A serial link for DS16 acquisition from SLAVE to MASTER shall be composed with the 3 following lines :

Sample (called MAS16)

The SLAVE will be provided with a dedicated sample line managed by the MASTER. It is generally set to “0” level when the MASTER want to receive a 16 bit information.

Clock (called HS16) (*)

One clock line is provided to the SLAVE. 16 of these clocks pulses are gated during the MC16 signal interval, together with 16 bits data, thus enabling the user to read the data after detection of one of its addresses. The clock pulses have a known and reliable phase relationship with the data transitions, thus ensuring reliable data read by the SLAVE.

Data (called DAS16)

SLAVE delivers the data to the MASTER.

(*) Note that, in case the serial link contains also a Digital serial telemetry, the HS16 clock can be common to both needs (ML transfer or DS16 request).

EIF1-167 / T,R /

These commands shall be exchanged between MASTER and USER and shall follow the Timing and waveforms as indicated :

•in Figure 8.2-1 for signal waveform

•in Table 8.2-1 for Timings / Switching times

EIF1-168 / R /

Data transfer principle :

- At USER level (BSME), transient between 2 consecutive bits can be done on the falling edge of the clock (this implies that "t8" timing can be close to "0")

- at MASTER level (ACDM), data could be read on the rising edge (note that "B0" bit information should be read before the first falling edge) or on the current falling edge (thanks to delays of circuits, available data should be read first by ACDM prior the data is changed by the BSME)


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ACQUISITION RATE 125 Kbps (1) t1 54 t t2 4 t (+ t) t3 104 t (+ t) t4 18 t (+ t) t5 4 t (+ 0.1 t) t6 2 t (+ 0.6 t) t7 < 16 t t8 0,1 t (*) < t8 < 1.2 t t9 > 1.5 t

A tr (rise time) 10 ns < t < 0.8 µs tf (fall time) 10ns < t < 0.3 µs

B tr (rise time) 10 ns < t < 0.8 µs tf (fall time) 10 ns < t < 0.3 µs

C tr (rise time) 10 ns < t < 0.8 µs tf (fall time) 10 ns < t < 0.3 µs

(*) Minimum timing has been implemented in order to avoid any ambiguity on the DS16 transfer. W here : A : Sampling signal B : Acquisition clock signal C : data bit t = 2-20 s ∼ 0.98 µs (∼ 1 µs) Notes : (1) 125 kbps is the nominal rate (+10% setting) (2) Signals are measured when the user's interface is fully and properly connected to the memory load output (3) Pulse widths and propagation delays are measured at 50 % of full amplitude (4) Rise (tr) and fall (tf) times are measured between 10 % and 90 % of full amplitude.

Table 8.2-1: DS16 (SERIAL 16 BIT ACQUISITION) SIGNAL DURATIONS AND SWITCHING TIMES

t3

t4 t9t2 t4

t5t6

BASIC SDC protocol

t9

t8 t8

B15 B14 B13 B12 B11 B10 B9B8B7B6B5B4B3B2B1B0

t7

t2

t1 t1

(3)HS16

(2)MAS16

(4)DAS16

Note (1) : Time interval corresponds to the interrogation bus interval

Note (2) : Sampling signal at the user’s input. It corresponds to the MAS16 signal

Note (3) : Acquisition clock signal at the user’s input. It corresponds to the HS16 signal


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Note (4) : User’s serial input to encoder (B0 is the MSB and is transmitted first). Logical ONE is a positive voltage and logical “zero” is a zero voltage. It corresponds to the DAS16 signal

Figure 8.2-1: DS16 (SERIAL 16 BIT ACQUISITION) SIGNAL : SIGNAL WAVEFORM DIAGRAM


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9 ANNEX 2 : TM/TC SERIAL LINK PROTOCOL BETWEEN ACDM & BSME

EIF1-178 / T,R /

ACDM and BSME shall comply with all requirements listed in the current Annex.

9.1 DIGITAL COMMANDS

A specific protocol “CMD_BSA” has been defined between ACDM and BSME. This protocol considers the use of 2 consecutive 16 bit words :

• the first one contains the address of the register inside the BSME or if it represents a TM request,

• the second one contains the data to be loaded at this address. This specific protocol uses the ADDRESS signal.

EIF1-181 / T,R /

ACDM and BSME shall comply with the detailed list of commands as given in Figure 9.1-1.

EIF1-182 / T,R /

Differenciated commands are defined for closed loop mode (angular commands) and open loop mode (setpoint commands), in order to have the possibility of using different transfer functions. The number of necessary commands and the kind of transfer functions for open loop shall be defined by subcontractor

EIF1-183 / T,R /

The first 16 bit word is used to identify the type of information to be up-loaded or the address :

When BSME receive the command with values :

- between “0000” and “FFF0”, the next word contains the data to be loaded at this address

- “FFFF”, the BSME knows that Telemetries of block TM_BSME are requested by ACDM

Command protocol

using the 2 16b words Command

name Parameter designation Channel Address

(A) Data (B) Length

(bit) CM_1_BSA BSA Mode - 0000 4 CM_2_BSA COM_BSA_X : angular command - 0001 16 CM_3_BSA COM_BSA_Y : angular command 0002 16 CM_4_BSA COM_BSA_S1 : set point command 1 0003 16 CM_5_BSA COM_BSA_S2 : set point command 2 0004 16 CM_6_BSA COM_BSA_S3 : set point command 3 0005 16 CM_7_BSA COM_BSA_S4 : set point command 4 0006 16 CM_8_BSA Spare 0007 16 CM_9_BSA Spare 0008 16

CM_10_BSA Spare 0009 16 CM_11_BSA Spare 000A 16 CM_12_BSA Spare 000B 16 CM_13_BSA Spare 000C 16 CM_14_BSA Spare 000D 16 CM_15_BSA Spare 000E 16 CM_16_BSA Spare 000F 16

(A) First 16-bit word which represents the ADDRESS : the value is expressed in Hexadecimal (values TBC)


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(B) The Second 16-bit word represents the DATA and the content is expressed in number of bits necessary for this data

Figure 9.1-1: Detailed list of BSME commands: TBC

9.1.1 Calibration curve for BSME sub-mode parameter

EIF1-189 / T,R /

ACDM and BSME shall comply with the BSME sub-mode calibration listed below.

MSB LSB B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 X X X X X X X X X X X X

MSB LSB B12 B13 B14 B15

SUB-MODE

MODE (B12, B13, B14, B15) :

0000 (For STAND-BY mode)

0101 (For Closed Loop mode)

1010 (for Open Loop mode)

DEFAULT VALUE : 0000

9.2 DIGITAL TELEMETRIES

The BSME will send 1 set of telemetries TM_BSA through the Serial link

EIF1-198 / T,R /

Differenciated telemetries are defined for closed loop mode (angular position) and open loop mode (setpoint values), in order to have the possibility of using different transfer functions. The number of necessary telemetries and the kind of transfer functions for open loop shall be defined by subcontractor

EIF1-199 / T,R /

ACDM and BSME shall comply with the detailed list of telemetries from BSA as given in Figure 9.2-1.


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Nber parameter Name Size 1 Status word of the current BSA Mode : copy of

the loaded mode. POS_MODE_BSA 16 bit

2 Status word for detailed status of BSA internal functions, and errors detected in sequencing

FAIL_BSA_STATUS 16 bit

3 Position X POS_BSA_X 16 bit 4 Position Y POS_BSA_Y 16 bit 5 POS_BSA_S1 POS_BSA_S1 16 bit 6 POS_BSA_S2 POS_BSA_S2 16 bit 7 POS_BSA_S3 POS_BSA_S3 16 bit 8 POS_BSA_S4 POS_BSA_S4 16 bit 9 BSA_parameter_spare_1 BSA_12_TM 16 bit

10 BSA_parameter_spare_2 BSA_13_TM 16 bit 11 BSA_parameter_spare_3 BSA_14_TM 16 bit 12 BSA_parameter_spare_4 BSA_15_TM 16 bit 13 BSA_parameter_spare_5 BSA_16_TM 16 bit 14 BSA_parameter_spare_6 BSA_17_TM 16 bit 15 BSA_parameter_spare_7 BSA_18_TM 16 bit 16 BSA_parameter_spare_8 BSA_19_TM 16 bit 17 BSA_parameter_spare_9 BSA_20_TM 16 bit 18 BSA_parameter_spare_10 BSA_21_TM 16 bit 19 BSA_parameter_spare_11 BSA_22_TM 16 bit 20 BSA_parameter_spare_12 BSA_23_TM 16 bit 21 BSA_parameter_spare_13 BSA_24_TM 16 bit 22 BSA_parameter_spare_14 BSA_22_TM 16 bit 23 BSA_parameter_spare_15 BSA_23_TM 16 bit 24 BSA_parameter_spare_16 BSA_24_TM 16 bit 25 Copy of CM_1_BSA BSA_25_TM 16 bit 26 Copy of CM_2_BSA BSA_26_TM 16 bit 27 Copy of CM_3_BSA BSA_27_TM 16 bit 28 Copy of CM_4_BSA BSA_28_TM 16 bit 29 Copy of CM_5_BSA BSA_29_TM 16 bit 30 Copy of CM_6_BSA BSA_30_TM 16 bit 31 Copy of CM_7_BSA BSA_31_TM 16 bit 32 Copy of CM_8_BSA BSA_32_TM 16 bit 33 Copy of CM_9_BSA BSA_33_TM 16 bit 34 Copy of CM_10_BSA BSA_34_TM 16 bit 35 Copy of CM_11_BSA BSA_35_TM 16 bit 36 Copy of CM_12_BSA BSA_36_TM 16 bit 37 Copy of CM_13_BSA BSA_37_TM 16 bit 38 Copy of CM_14_BSA BSA_38_TM 16 bit 39 Copy of CM_15_BSA BSA_39_TM 16 bit 40 Copy of CM_16_BSA BSA_40_TM 16 bit

Figure 9.2-1: Detailed list of TM_BSA block

Note : TM_BSA block contains 40 informations. The content of the TMs not defined in TM_BSA block are “TBC by BSA contractor. All these informations shall reflect the real setting of the BSA.


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10 ANNEX 3 : CONNECTORS & PIN FUNCTION

10.1 CONNECTORS AT ACDM

To be defined.

10.2 CONNECTORS AT BSME

To be defined.


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Requirement/Section Cross Reference Page numbers are the pages where the sections start

EIF1-11............... 1.2....................8 EIF1-27............... 4.......................12 EIF1-28............... 4.......................12 EIF1-29............... 4.......................12 EIF1-30............... 4.......................12 EIF1-31............... 4.......................12 EIF1-32............... 4.......................12 EIF1-33............... 4.......................12 EIF1-34............... 4.......................12 EIF1-59............... 6.1.1.................16 EIF1-60............... 6.1.1.................16 EIF1-61............... 6.1.1.................16 EIF1-62............... 6.1.1.................16 EIF1-63............... 6.1.1.................16 EIF1-66............... 6.1.2.1..............16 EIF1-67............... 6.1.2.1..............16 EIF1-68............... 6.1.2.1..............16 EIF1-69............... 6.1.2.1..............16 EIF1-71............... 6.1.2.2..............17 EIF1-72............... 6.1.2.2..............17 EIF1-73............... 6.1.2.2..............17 EIF1-74............... 6.1.2.2..............17 EIF1-76............... 6.1.2.2.1.1........17 EIF1-82............... 6.1.2.3..............18 EIF1-83............... 6.1.2.3..............18 EIF1-84............... 6.1.2.3..............18 EIF1-85............... 6.1.2.3..............18 EIF1-86............... 6.1.2.3..............18 EIF1-94............... 6.2.1.................19 EIF1-95............... 6.2.1.................19 EIF1-96............... 6.2.1.................19 EIF1-97............... 6.2.1.................19 EIF1-98............... 6.2.1.................19 EIF1-99............... 6.2.1.................19 EIF1-103............. 6.2.2.................20 EIF1-105............. 6.2.3.................21 EIF1-109............. 6.2.4.................21 EIF1-110............. 6.2.4.................21 EIF1-111............. 6.2.4.................21 EIF1-112............. 6.2.4.................21 EIF1-117............. 6.2.4.1..............22 EIF1-118............. 6.2.4.1..............22 EIF1-125............. 6.2.4.2.1...........23 EIF1-126............. 6.2.4.2.1...........23 EIF1-130............. 6.2.4.3..............23 EIF1-131............. 6.2.4.3..............23 EIF1-133............. 6.3....................24 EIF1-134............. 6.3....................24 EIF1-135............. 6.3....................24 EIF1-136............. 6.3....................24 EIF1-137............. 6.3....................24 EIF1-142............. 7.1....................25 EIF1-143............. 7.1....................25 EIF1-146............. 7.1.1.1..............25

EIF1-147 .............7.1.1.1 ............. 25 EIF1-149 .............7.1.1.2 ............. 25 EIF1-153 .............8.1 ................... 26 EIF1-154 .............8.1 ................... 26 EIF1-155 .............8.1 ................... 26 EIF1-166 .............8.2 ................... 28 EIF1-167 .............8.2 ................... 28 EIF1-168 .............8.2 ................... 28 EIF1-178 .............9 ...................... 31 EIF1-181 .............9.1 ................... 31 EIF1-182 .............9.1 ................... 31 EIF1-183 .............9.1 ................... 31 EIF1-189 .............9.1.1 ................ 32 EIF1-198 .............9.2 ................... 32 EIF1-199 .............9.2 ................... 32 EIF1-293 .............6.2.4.2 ............. 23


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DOCUMENT CHANGE DETAILS

ISSUE CHANGE AUTHORITY CLASS RELEVANT INFORMATION/INSTRUCTIONS

01

DISTRIBUTION LIST

INTERNAL EXTERNAL

C. DELETTREZ ASD :

L. LE HORS U. SLANSKY

L. MAZURAY R. MÜNZENMAYER

D. PIBRAC J. PILLER

P. THORAL

Y. TOULEMONT ESA :

T. SALAÜN A. HELIERE

R. TARDIVIER

L. SOREDA SEA :

F. QUINTAIROS S. CHALKLEY

Configuration Management

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