Some standard content:
FL5840 Military Standard for Electronic Industry of the People's Republic of China
SJ20620-97
General Specification for Military Weather Radars
General Specification for Military Weather Radars1997-06-17 Issued
1997-10-01 Implementation
Approved by the Ministry of Electronic Industry of the People's Republic of China Military Standard for Electronic Industry of the People's Republic of China General Specification for Military Weather Radars
General Specification for Military Weather Radars1 Scope
1, 1 Topic Content
This specification specifies the requirements, quality assurance regulations, delivery preparation, etc. for military weather radars. 1.2 Scope of Application
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This specification applies to the development, production and inspection of military weather radars and is the basic basis for formulating product specifications for military weather radars (hereinafter referred to as radars).
2 cited documents
GB 3784—83
GR/T 12648—90
GB/T12649—90
GJR 74.2--85
GJB 74. 5—85
GFB 74. 6--85
GI 74. 8-85
GJB 74. 9—85
GJB 74,14--85
GJB 150. 1--86
GIB 15L.4--85
GJB 152—86
GJB 368.5-87
GJB 899—90
SI 3218—89
SI 3223—89
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3 Requirements
Ray Terminology
General Technical Conditions for Weather Radar
Meteorological Radar Parameter Test Methods
General Technical Conditions for Military Ground Radars Common Terminology General Technical Conditions for National Ground Radars Design and Manufacturing Requirements General Technical Conditions for Military Ground Radars Environmental Conditions Requirements and Test Methods General Technical Conditions for Military Ground Radars Flight Inspection Specifications for Air Intelligence Radars General Technical Conditions for Military Ground Radars Acceptance Rules General Technical Conditions for Military Ground Radars Marking, Packaging, Transportation, Storage General Rules for Environmental Test Methods for Military Equipment
Electromagnetic Emission and Sensitivity Requirements for Military Equipment and Subsystems Ground Installations (Fixed) and mobile, including tracked and wheeled vehicles) (Class A3) General specifications for the maintainability of military equipment and subsystems Electromagnetic emission and sensitivity measurement equipment Maintainability test and evaluation Reliability identification and acceptance test General technical conditions for ground radar receiving systems General technical conditions for radar transmitting systems Tactical performance test methods for military weather radars Ministry of Electronics Industry of the People's Republic of China Issued on June 17, 1997 Implementation on October 1, 1997 3.1 Qualification identification SI20620-97 Products submitted in accordance with this specification shall be qualified or approved products. 3.2 Design (see 4.7.1) 3.2.1 Radar design must ensure the tactical and technical performance of the product, implement the design principles of universalization, serialization, combination and modularization, and ensure convenient operation and maintenance, safe and reliable use. 3.2.2 Unless otherwise specified, the materials to be selected shall comply with the provisions of Article 4.9 of GJB74.5. 3.2.3 Unless otherwise specified, the design of parts and components shall comply with the provisions of Articles 4.1 to 4.8 of GJB74.5. 3.2.4 Unless otherwise specified, the design of volume, weight and transportability shall comply with the provisions of Article 1.1 of GJB74.5. 3.2.5 Unless otherwise specified, the standardization design shall comply with the provisions of Article 1.2 of GJB74.5. 3.2.6 Unless otherwise specified, the design of reliability and maintenance shall comply with the provisions of Articles 1.3, 3.4.3 and 3.4.4 of GJB74.5.
3.2.7 Unless otherwise specified, the design of man-machine-environment system engineering shall comply with the provisions of Article 1.4 of GJB74.5. 3.2.8 Unless otherwise specified, safety design shall comply with the provisions of 1.8.2, 1.8.3 and 1.9 of GJB74.5. 3.3 Dimensions and weights (see 4.7.2)
The dimensions and weights of the products shall be specified in the product specifications. 3.4 Surface condition and color (see 4.7.3) 3.4.1 Unless otherwise specified, surface coating and chemical treatment shall comply with the provisions of GJB74.5 and 4.11.1, 4.11.2, 4.11.3.3-4.11.3.6.
3.4.2 Unless otherwise specified, color shall comply with the provisions of 3.6.1 and 4.11.3.2 of GJB74.5. 3.5 Appearance quality (see 4.7.4)
The outer surface of the radar should be free of defects such as scratches, bumps, cracks and deformation; the coating should not bubble, crack or fall off; the metal parts should be free of rust, burrs and other mechanical damage. 3.6 Marks and codes (see 4.7.5)
3.6.1 All control components should be equipped with signs indicating their functions and uses. 3.6.2 Components, printed boards, etc. should be printed with signs in the corresponding positions that match the project codes in the circuit diagram. 3.6.3 Cabinets, chassis, plug-ins and relays should have unified numbered labels. 3.6.4 The words and letters of the labels should be complete, clear and firm. 3.6.5 The radar should have a nameplate, which generally includes the following contents: a. The name and model (code) of the radar; b. Production batch number:
Year and month of production!
d. Manufacturer's name.
3.7 Performance characteristics
3.7.1 Main tactical performance
3.7.1.1 Operating frequency range (see 4.7.6.1) The operating frequency band is selected within the S, C, X band, or a combination of S and X; the specific operating frequency is specified by the product specification. 3.7.1.2 Detection range (see 4.7.6.2)
The parameter values of the detection range are selected according to the following requirements: a. Detection distance: When measuring intensity, the detection distance: 0~600km; when measuring speed, the detection distance: 0~300km; 12
b. Detection altitude: 0~24km;
c Azimuth: 0~360;
d. Detection angle: 0~-90°.
3.7.1.3 Measurement performance
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3.7.1.3.1 Detection accuracy (RMS error) (see 4.7.6.3) The parameter values of detection accuracy are selected according to the following requirements: a. Azimuth error: not more than 0.3 (point surrounding mark); b. Elevation error: not more than 0.3 (point target); c. Distance error: not more than 500m (point target) l. Altitude error: not more than 500m (point moon mark); e. Velocity error (radial): not more than 1m/s (single frequency). 3.7.1.3.2 Resolution (point moon mark) (see 4, 7.6.4) Distance resolution: not more than 500m;
b. Angular resolution: not more than beam width: c. Strength resolution is not greater than 1dBZ;
d. Speed resolution: not greater than 1m/sa
3.7.1.4 Quick response (see 4.7.6.5)
F machine time: 3~5min
3.7.1.5 Mobility (see 4.7.6.6)
3.7.1.5.1 Loading type: mobile, fixed 3.71.5.2 Transportation method: land, water and air, 3.7.1.5.3 The number of transport units is specified by the product specifications. 3.7.1.5.4 The time for erection and dismantling is specified by the product specifications, 3.7.1.6 Reaching the terminal (see 4.7.6.7)
3.7.1.6.1 Signal processing subsystem
a. Multi-Pinghan signal processing;
h. Automatic fault monitoring.
3.7.1.6.2 Data processing subsystem
a. Host: general-purpose computer;
b. Display: color optical blue-ray disc;
color printer;
d. Communication interface;
e. Three remote functions (remote control, telemetry and teletransmission); Application software: fault monitoring, calibration, communication, target intensity, speed information, wind field inversion and graphics processing. 3.7.1.7 Other tactical performance
3.7.1.7.1 Continuous working time (see 4.7.6.8) Can work continuously.
3.7.1.7.2 Power supply mode and maximum power consumption of the whole machine (see 4.7.6.9) The radar power supply station or the mains supply provides a three-phase 380V.50Hz power supply, and its power consumption is specified by the product specification. 3.7.2 Main technical performance
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3.7.2.1 Antenna subsystem
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3.7.2.1.1 Antenna polarization mode (see 4.7.7.1.1) Antenna single polarization radar preferably adopts water polarization, and other antenna polarization modes are specified by the product specification. 3.7.2.1.2 Antenna beamwidth (see 4.7.7.1.2) Antenna beamwidth is specified by the product specification. 3.7.2.1.3 Antenna sidelobe level (see 4.7.7.1.3) Antenna sidelobe level is specified by the product specification. 3.7.2.1.4 Antenna gain (see 4.7.7.1.4) Antenna gain is specified by the product specification.
3.7.2.1.5 Beam pointing error (without radome) (see 4.7.7.1.5) a, azimuth pointing error: not more than 5\: b, elevation pointing error: not more than 5.
3.7.2.1.6 Radome attenuation (see 4.7.7.1.6) a. The cumulative attenuation of the large line is not more than 0.5dB (two-way);. The beam pointing deviation introduced by the large line radome is not more than 0.1°3.7.2.1.7 Antenna type, size and installation requirements (see 4.7.7.1.7) a. The antenna type is a parabola;
b, antenna diameter: 1.5, 2.5, 4, 6, 9m; c. Antennas not less than 2.5m should be installed in the radome; Large line radome diameter: 4, 5.68.12m. 3.7.2.2 Feeder subsystem
3.7.2.2.1 Electric standing wave ratio (see 4.7.7.2.1) The input standing wave ratio of the feeder system shall not be greater than 1.3.3.7.2.2.2 Power capacity (see 4.7.7.2.2) When the transmitter operates at rated power, the feeder system shall operate normally in the specified operating environment. 3.7.2.2.3 Loss (see 4.7.7.2.3)
The loss of the transmitting branch and the receiving branch shall be specified in the product specification. 3.7.2.3 Transmitter subsystem
3.7.2.3.1 Transmitter operating frequency (see 4.7.7.3.1) The transmitter operating frequency shall meet the requirements of the radar operating frequency. 3.7.2.3.2 Output power (see 4.7.7.3.2) The output power of the operating frequency shall be specified in the product specification. 3.7.2.3.3 Transmit pulse envelope (see 4.7, 7.3.3) Transmit pulse envelope is specified by product specifications. 3.7.2.3.4 Pulse repetition frequency (see 4.7.7.3.4) Pulse repetition frequency is specified by product specifications. 3.7.2.3.5 RF pulse harmonic spectrum (see 4.7.7.3.5) RF pulse spectrum width and main-to-sub ratio are specified by product specifications. 3.7.2.3.6 Cooling (see 4, 7.7.3.6)
Cooling equipment should ensure normal operation of the transmitter. 3.7.2.3.7 Control and indication (see 4.7.7.3.7) 4
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Control, indication requirements and automatic detection points are specified by product specifications. 3.7.2.3.8 Safety protection (see 4, 7.7.3.8) There should be human-machine safety protection measures, and its specific measures are specified by product specifications. 3.7.2.3.9 Efficiency (see 4.7.7.3.9)
Efficiency is specified by the product specification.
3.7.2.3.10 Noise (see 4.7.7.3.10) Noise is specified by the product specification.
3.7.2.4 Receiving subsystem
3.7.2.4.1 Receiver operating frequency (see 4.7.7.4.1) The receiver operating frequency shall meet the requirements of the transmitter operating frequency. 3.7.2.4.2 Receiver sensitivity (see 4.7.7.4.2) S-band: better than -109dBmW;
C-band: better than ~-108dBmW;
X-band: better than =105dBmW.
3.7.2.4.3 Receiver gain control (see 4.7.7.4.3) Receiver sensitivity time gain control (short-range gain control): distance 0-150km, attenuation 0-48dB Control accuracy is specified by product specifications.
3.7.2.4.4 Intermediate frequency and bandwidth (see 4.7.7.4.4) Intermediate frequency and bandwidth are specified by product specifications. 3.7.2.4.5 Linear and logarithmic branch dynamic range (see 4.7.7.4.5) Linear branch dynamic range is not less than 80dB; logarithmic branch dynamic range is not less than 70dB. 3.7.2.4.6 Fault detection (see 4.7.7.4.6) Automatic detection point is specified by product specifications.
3.7.2.5 Signal processing subsystem (see 4.7.7.5) Input signal: logarithmic video; IQ quadrature video; a.
A/D converter: word length and sampling period are specified by product specifications: h.
Number of distance bins: specified by product specifications;
Length of distance bins: specified by product specifications;
Range processing range: specified by product specifications; Integration method: distance integration and azimuth integration, specified by product specifications; f.
Integration accuracy: not more than 1dB (tool error); h
Maximum unambiguous velocity: specified by product specifications; i.
Maximum estimation standard deviation: specified by product specifications; j. Ground clutter suppression ratio:
Full coherence: not less than 45dB (almost mean) Non-full coherence: not less than 27dB (average value): k, Output signal: specified by product specifications; 1. Fault detection: Automatic detection points out product specifications. 3.7.2.6 Monitoring subsystem
3.7.2.6.1 Main performance monitoring (see 4.7.7.6.1)5
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It should have the function of main performance monitoring.
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3.7.2.6.2 Main fault monitoring (see 4.7.7.6.2) The main fault monitoring should be isolated to the replaceable unit. The fault detection rate and accuracy rate are not less than 90%. 3.7.2.7 Data processing subsystem (see 4.7.7.7)3.7.2.7.1 Computer
General-purpose computer.
3.7.2.7.2 Display
Color raster monitor.
3.7.2.7.3 Basic functions
3.7.2.7.3.1 Real-time processing
Real-time PPI: The antenna rotates continuously in azimuth, with a rotation speed of not less than 2r/min. The elevation angle can be arbitrarily selected within the range of 0-90°. It can switch to this azimuth for real-time RHI according to the azimuth determined by the cursor; b. Real-time R[: The antenna scans continuously in elevation, with a scanning speed of not less than 2\/min. The azimuth angle can be arbitrarily selected within the range of 0-88°. It can switch to this elevation angle for real-time PPI according to the elevation angle determined by the cursor; c. Stereo scanning: The antenna rotates continuously in azimuth, and the elevation angle is stepped within the range of 0--45\; d. PPI acquisition: within the range of 0~90° elevation angle, the azimuth angle rotates one circle to collect all data; e. RHI acquisition: within the range of 0~360° azimuth angle and 0~88\ elevation angle, all data are collected. Except for item C, which only includes intensity, the other monthly averages include intensity, speed and spectrum width. 3.7.2.7.3.2 Precipitation analysis
NRTPPI: non-real-time PPI display;
REPPI: re-display PPI;
Multi-layer CAPPI: equal height plane position display: c.
Any altitude layer CAPPI display;
ETPPI: cloud top high plane position display; EBPPI: cloud bottom high position display:
0~70dBZ arbitrary intensity value EBPPI display ;NRTRHI: non-real-time RHI display:
XSECT: vertical profile at any position;
j.VIU: water content accumulation chart;
RANI: one-hour precipitation accumulation chart;
RANN: any hour precipitation accumulation chart (time optional): 1
ZPPI: zero elevation angle PPI;
Layered display: echo attenuation chart; n.
Creative wave wheel display.
3.7.2.7.3.3 Wind field data analysis
a. NRTPPI of Doppler velocity;
b. NRTRHI of Doppler velocity;
c.1. Radial shear diagram in one-dimensional horizontal wind shear; d. Azimuth shear diagram in one-dimensional horizontal wind shear; e. Two-dimensional horizontal shear diagram;
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f. Radial shear diagram in one-dimensional vertical wind shear: g. Azimuth shear diagram in one-dimensional vertical wind shear; h. Two-dimensional vertical shear diagram;
Full scale diagram: Displays the vortex image of the echo; i.
J: Wind field display diagram: Displays the wind field image of the echo: Divergence diagram: Displays the divergence image of the echo; k.
[.TVAD diagram: Simultaneously displays the VAD diagram of divergence, velocity and vortex in the radar action area and wind field inversion: and can simultaneously display the PPI diagram of wind field, divergence and vorticity; m. Multi-moment display: Simultaneously displays the intensity and velocity in the selected area. 3.7.2.7.3.4 Graphics processing
Coverage maps at three different altitudes at the same time; Coverage maps at the same altitude at three different times; h.
Multi-layer display:
Echo evolution analysis: Automatically match the extrapolation of the fall point of the convective weather; d.
Multi-screen: Display up to four graphics on the same screen at the same time; Animation: Variable speed of movement, manual animation, the number of moving pictures is specified by the product specification: Graphic smoothing;
Geometric filtering;
Graphics statistics;
Graphics zoom and roaming;
Graphics storage and map loading:
1. The cursor of the graphics records azimuth, elevation, intensity, speed and time. 3.7.2.7.3.5 Other software
a. Radar data management software;
b. Need to reach the calibration procedure.
3.7.2.7.3.6 Radar working status monitoring and control 3.7.2.7.3.6.1 Radar working status monitoring Automatically monitor the fault monitoring points of each radar subsystem and display the fault location. The number of fault monitoring points is specified by the product specification. 3.7.2.7.3.6.2 Radar working status control The computer controls the on and off of the radar voltage power supply, controls the on and off of the radar transmitter high voltage, controls the antenna working status, and controls the signal processing working status.
3.7.2.7.3.7 Interface
It has corresponding data recording equipment and communication interfaces, and the interface requirements are specified by the product specification. 3.7.2.8 Antenna control subsystem
3.7.2.8.1 Antenna scanning mode (see 4.7.7.8.1) a: CAPPI scanning;
.PPI cat:
RHI JIemi;
Other scanning modes are specified by product specifications, d.
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3.7.2.8.2 Antenna control speed (see 4.7.7.8.2) a, Azimuth control speed: 1, 2.3.4, 5, 6r/min, 2~3 of them can be selected; b. Azimuth control speed 1~6/s.
3.7.2.8.3 Antenna angle control accuracy (RMS value) (see 4.7.7.8.3) Antenna angle control accuracy is less than 0.2°
3.7.2.8.4 Angle data display resolution (see 4.7.7.8.4) Angle data display resolution is 0.1°.
3.7.2.8.5 Protection and safety measures (see 4.7.7.8.5) Circuit and machine protection and safety measures should be provided. The specific measures shall be specified by the product specifications. 3.7.2.9 Timing subsystem (see 4.7.7.9.1) Timing pulse requirements shall be specified by the product specifications. 3.7.2.10 Power supply subsystem (see 4.7.7.10) When the power supply voltage deviates by ±10% and the frequency deviates by ±1Hz, the radar shall operate normally; when the power supply voltage deviates by ±15% instantaneously, the radar shall not have a fault that damages the device. 3.8 Safety (see 4.7.8)
3.8.1 Safety value of harmful radiation
Safety value of harmful radiation shall be in accordance with the provisions of 1.9.2.13~1.9.2.16 of GJB74.5. 3.8.2 Fire prevention measures
Fire prevention measures shall be taken, and the specific measures shall be specified by the product specifications. 3.8.3 Safety signs
Various safety signs shall be clear and eye-catching.
3.9 Environmental conditions
3.9.1 High temperature (see 4,7.9.1)
High temperature environmental conditions shall be in accordance with the provisions of Table 1 and specified by the product specifications. Table 1
Operating temperature
Outdoor equipment
Equipment outside the vehicle
Indoor equipment (with air conditioning)
Equipment inside the vehicle
3.9.2 Constant damp heat (except terminals, see 4.7.9.2) Constant damp heat environmental conditions shall comply with the provisions of 6.1 of GIB 74.6. 3.9. 3 Low temperature (see 4.7.9.3)
Low temperature environmental conditions shall comply with the provisions of Table 2.
Storage temperature
Outdoor equipment
Equipment outside the vehicle
3.9.4 Impact (see 4.7.9.4)
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Working temperature
Indoor equipment (with air conditioning)
Equipment inside the vehicle
Storage temperature
Impact environmental conditions shall be selected in accordance with the provisions of Article 8.1.2 of GJB74.6 and specified by the product specifications. 3.9.5 Collision (see 4.7.9.5)
Collision environmental conditions shall be selected in accordance with the provisions of Article 8.1.3 of GJB74.6 and specified by the product specifications. 3.9.6 Vibration (see 4.7.9.6)
Vibration environment conditions shall be selected in accordance with the provisions of Article 9.1 of GIB 74.6 and specified by the product specification. 3.9.7 Sports car (see 4.7.9.7)
Sports car environment conditions shall be selected in accordance with the provisions of Article 10.1 of GJB 74.6 and specified by the product specification. 3.9.8 Mold growth (see 4.7.9.8)
Mold growth environment conditions shall be selected in accordance with Article 11.1 of GJB 74.6. 3.9.9 Salt spray (see 4.7.9.9)
Salt spray environment conditions shall be selected in accordance with Article 12.1 of GJB 74.6. 3.9.10 Dust (see 4.7.9.10)
Dust environment conditions shall be selected in accordance with Article 13.1 of GJB 74.6. 3.9.11 Rainfall (see 4.7.9.11)
Rainfall environment conditions shall comply with the provisions of Article 14.1 of GJB74.6. 3.9.12 Wind environment (see 4.7.9.12)
The wind environment conditions shall be selected according to the following provisions:
a. Without antenna cover: Steady wind speed shall comply with the provisions of Article 16.1 of GJB74.6b. With antenna cover: Steady wind speed is 45m/s, gust speed is 67.5m/s (gust duration is 2 to 3s)3.10 Electromagnetic compatibility (see 4,7,10)
Electromagnetic compatibility shall comply with the relevant provisions of GIB 151.4. 3.11 Reliability (see 4.7.11)
The lower limit of mean time between failures (MTBF) shall not be less than 200h3.12 Maintainability (see 4.7.12)
The mean time to repair (MTTR) shall not be greater than 30mina3.13 Radar work site (see 4.7.13)
The radar work site requirements shall comply with the provisions of Article 3.4 of GJB74.8. Others
The connection between the radar and the ground shall be safe and reliable, and there shall be equipment ground wire, power grid ground wire and lightning protection ground wire. Lightning rods and radar public ground wires are not allowed to share the same grounding network. 4 Quality Assurance Provisions
4.1 Inspection Responsibility
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Unless otherwise specified in the contract or order, the contractor shall be responsible for completing all inspections specified in this specification. When necessary, the ordering party or the superior appraisal agency has the right to inspect any inspection item described in the specification. 4.1.1 Qualifications
All products must meet all requirements of Chapter 3 and Chapter 5 of this specification. All inspections specified in this specification shall become an integral part of the contractor's entire inspection system or quality outline. If the contract includes inspection requirements not specified in this specification. The contractor shall also ensure that the products submitted for acceptance meet the contract requirements, and quality consistency sampling is not allowed to submit products that are known to be defective, nor can the ordering party be required to accept defective products. 4.2 Inspection classification
The inspections specified in this specification are divided into:
a. Appraisal inspection;
b. Quality consistency inspection.
4.3 Inspection conditions
Unless otherwise specified, all inspections shall be carried out under the conditions specified in Article 3.1.1 of GJB150.1. 4.4 Identification and Inspection
Identification and inspection shall generally be carried out in any of the following circumstances: a. When the design or production is finalized;
b. When the product is resumed after a long period of suspension; c. When there are major changes in product design, manufacturing process, key components and materials that may affect product performance. 4.4.1 Inspection Samples
Unless otherwise specified, the contractor shall provide at least one (set) of radars for identification and inspection. 4.4.2 Inspection Items and Sequence
Unless otherwise specified, identification and inspection shall be carried out in accordance with the items and sequence listed in Table 3. Table 3
Test items
Dimensions and weight
Surface condition and color
Appearance quality
Mark and code
Working frequency range
Detection range
Detection accuracy
Resolution
Quick response
Mobility
Radar terminal
Consistency inspection of quality disk
Inspection Group A Group B Group C
Required
Chapter number
3.7.1.3.1
3.7.1.3.2
Test method
Chapter number
Test items
Continuous working time
Power supply mode and power consumption of the whole machine
Antenna polarization mode
Antenna lobe width
Off-line sub-discrimination level
Antenna gain|| tt||Beam finger error
Radome attenuation
Antenna type, size and installation requirements
Voltage standing still ratio
Power capacity
Transmitter operating frequency
Output power
Transmit pulse envelope
Pulse repetition frequency
Radio pulse spectrum
Control and indication
Safety protection
Receiver operating frequency|| tt||Connection modification degree
Receiver gain control
Intermediate frequency and bandwidth
Linear and logarithmic branch dynamic range
Fault detection
Signal processing subsystem
Main performance monitoring
Main fault monitoring
Data processing subsystem
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Quality consistency inspection
Group A Group B Group C! Group D
required
Article number
3.7.1.7.1
3.7.1.7.2
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3.7.2.1.3
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3.7.2.3.10
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3.7.2.4.2
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Testing method
Chapter number
4. 7.6. 9
4.7.7.1.1
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4.7.7.0.2
TTKAONTKACa-
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