SJ 20739-1999 General Specification for Battlefield Reconnaissance Radar
time:
2024-08-05 10:44:12
- SJ 20739-1999
- in force
Standard ID:
SJ 20739-1999
Standard Name:
General Specification for Battlefield Reconnaissance Radar
Chinese Name:
战场侦察雷达通用规范
Standard category:
Electronic Industry Standard (SJ)
-
Date of Release:
1999-11-10 -
Date of Implementation:
1999-12-01
Drafter:
Jiao Fang, Lu Yiping, Xia Zaixing, Lin HongDrafting Organization:
The 10th Research Institute of the Ministry of Electronics IndustryFocal point Organization:
China Electronics Standardization InstitutePublishing Department:
Ministry of Information Industry of the People's Republic of China
Description (Translated English) / downloadSkip to download
Summary:
This specification specifies the requirements, quality assurance regulations and delivery preparation for battlefield reconnaissance radars (hereinafter referred to as radars). This specification applies to various short-range, medium-range and long-range battlefield reconnaissance radars for reconnaissance and surveillance of ground moving targets. Shore-to-sea reconnaissance radars can also refer to this specification. This specification does not apply to reconnaissance radars with calibration functions. SJ 20739-1999 General Specification for Battlefield Reconnaissance Radars SJ20739-1999 Standard download decompression password: www.bzxz.net
Standard contentSome standard content:
Military Standard for Electronic Industry of the People's Republic of China FL5840
SJ20739-—1999
General specification for battlefield reconnaissance radar
General specification for battlefield reconnaissance radars1999-11-10Release
1999-12-01Implementation
Approved by the Ministry of Information Industry of the People's Republic of China1 Scope
1.1 Subject matter
1.2 Scope of application
2 Reference documents
3 Requirements
3.1 Qualification appraisal
Design and structure
Appearance quality
3.4 Size
Marking and code
3.7 Reliability
Maintainability
Man-machine-environment system engineering
Safety
Electromagnetic compatibility
Mobility||t t||3.13 Comprehensive guarantee capability
Performance characteristics
3.15 Environmental requirements
4 Quality assurance regulations
Inspection responsibilities
Inspection classification
Inspection conditions
Identification inspection
Quality consistency inspection
Packaging inspection
Test methods
5 Delivery preparation
5.1 Sealing and packaging
5.3 Transportation and storage
5.4 Marking
iKAoNrKAca-
（16)
6.1 Intended use
6.2 Contents of order documents
Appendix A Detection distance of battlefield reconnaissance radar (reference).........+..
1 Scope
General specification for battlefield reconnaissance radars, military standard of the People's Republic of China's electronics industry
General specification for battlefield reconnaissance radars
1. Subject content
SJ 20739--1999
This specification specifies the requirements, quality assurance regulations and delivery preparation for battlefield reconnaissance radars (hereinafter referred to as radars). 1.2 Scope of application
This specification applies to various short-range, medium-range and long-range battlefield reconnaissance radars for reconnaissance and monitoring of ground moving targets. Shore-to-sea reconnaissance radars can also refer to this specification. This specification does not apply to reconnaissance radars with calibration functions. 2 Reference Documents
GB/T14691--93 Technical Drawing Font
GJB74A--98 General Specification for Military Ground RadarGJB150.1~20-86 Environmental Test Methods for Military EquipmentGJB151A--96 Requirements for Electromagnetic Emission and Sensitivity of Military Equipment and SubsystemsGJB152A--96 Measurement of Electromagnetic Emission and Sensitivity of Military Equipment and SubsystemsGJB179A-96 Counting Sampling Inspection Procedures and TablesGJB181--86 Aircraft Power Supply Characteristics and Requirements for Electrical EquipmentGJB219A-94 General Specification for Military Communication VehiclesGJB425-88 General Technical Conditions for AC Power Frequency Gasoline Generator SetsGJB450-88 General Outline for Reliability of Equipment Development and ProductionGJB516-88 Technical Conditions for Lead-acid Batteries for Military VehiclesGJB613-88 Technical conditions for ground radar terminal equipment GJB1062-91 General requirements for ergonomic design of military visual displays GJB1289-91 Test methods for tactical performance of battlefield reconnaissance radars GJB1298-91 Maintainability evaluation and test methods for general radars and directors GJB1854-93 Model specification and numbering requirements for ordnance equipment GJB/Z9001-96 Quality system-Quality assurance model for design, development, production, installation and service SJ2811--87 General DC stabilized power supply
SJ20740-1999 Performance test methods for battlefield reconnaissance radars Issued by the Ministry of Information Industry of the People's Republic of China on November 10, 1999
Implementation on December 1, 1999
3 Requirements
3.1 Qualification appraisal
SJ 20739-1999
Products submitted in accordance with this specification shall be products that have passed the appraisal or have been approved for finalization. 3.2 Design and Structure
The design and structure of the radar shall comply with the provisions of Article 3.2 of GJB74A. The design and structural requirements of key parts and important parts shall be specified by the product specifications. 3.3 Appearance Quality
a. The appearance quality shall comply with the provisions of Article 3.3 of GIB74A: b. Switches, knobs, buttons, hand wheels, operating balls (rods), etc. shall be flexible, convenient, and have a good feel, and fasteners shall not be loose.
3.4 Dimensions
The dimensions of each radar unit shall be specified by the product specifications. 3.5 Weight
The weight of each radar unit shall be specified by the product specifications. 3.6 Marking and Code
The marking and code shall comply with the provisions of Article 3.7 of GJB74A. 3.7 Reliability
3.7.1 Mean Time Between Failures (MTBF): not less than 300h. 3.7.2 The success rate of one-time startup after marching: not less than 90%. 3.8 Maintainability
3.8.1 Automatic fault detection
The radar should be equipped with built-in self-test equipment (BITE) that can perform functional inspection, status test, fault detection, fault alarm indication and locate the field replaceable unit. Their working process and detection and positioning results should be automatically displayed by characters. 3.8.2 Basic-level maintenance
a. Fault detection method: BITE plus auxiliary monitoring: b. Fault detection rate: not less than 95%
C. Fault isolation rate: not less than 90%
d. Fault false alarm rate: not more than 2x10-2/h, 3.8.3 The mean time to repair (MTTR) of basic-level faults should not exceed 30 min.
3.8.4 Interchangeability
The random spare parts (units, modules, parts, components, complete parts and key components) of the radar with the same function should have complete physical interchangeability. Among them, after the field replaceable units are replaced, no adjustment should be required, and the tactical and technical performance will not be affected.
3.8.5 Preventive maintenance cycle
a. Grassroots level: 15d;
b. Relay level: 0.5a:
c. Base level: 2~4ai
d. Special maintenance requirements: specified by product specifications. - 2 -
3.9 Man-machine-environment system engineering
SJ 20739--1999
Specified by product specifications and shall comply with the provisions of Article 3.9 of GJB74A. 3.10 Safety
Specified by product specifications and shall comply with the provisions of Article 3.10 of GJB74A. 3.11 Electromagnetic compatibility
The electromagnetic emission and sensitivity requirements of the radar shall comply with the relevant provisions of item 5 in table 1 of GJB151A. The tailoring of the item is specified by the product specification.
3.12 Mobility
3.12.1 Transportability
The radar shall be suitable for land, sea and air transportation such as vehicles, ships and airplanes. For short-range and medium-range radars, it shall be possible to carry people on horseback into the position. The specific requirements are specified in the product specification. 3.12.2 Multi-platform installation
For short-range and medium-range radars, it shall be suitable for multiple platform installation methods such as tripods, lifting frames, roofs of light vehicles and unmanned reconnaissance aircrafts; for long-range radars, it shall be suitable for loading on multiple aerial platforms such as helicopters, balloons, airplanes and airships. The specific loading form is specified by the product specification.
3.12.3 Setting up and disassembling
a: Land-based battlefield reconnaissance radar
Setting up time: 3~20min;
Disassembling time: 2~15min:
b. Airborne battlefield reconnaissance radar
Specified by product specifications.
3.12.4 Raising frame
Structural form: lifting or folding type:
b. Lifting method: hydraulic automatic, semi-automatic or manual operationc. Lifting height and setting up and disassembling time:Specified by product specificationsd. Transportation method: horizontal trailer:
e. Others:Should meet the tactical requirements of the weapon system. 3.12.5 Radar carrier
a. General requirements
Should comply with the provisions of Chapter 3 of GJB 219A.
b. Special requirements
Specified by product specifications.
3.12.6 Lifting platform
3.12.6.1 Category Model
8: Tethered balloon:
b. Rotating remote control aircraft:
d. Helicopter:
e Fixed-wing aircraft:
f. Airship.
KAoNrKAca-
3.12.6.2 Selection Principles
SJ 20739—1999
a. Working altitude, endurance (hovering) time, and effective load are specified by product specifications. b. Good maneuverability and concealment
C. Strong combat survivability;
d. Economical.
3.13 Comprehensive Support Capability
3.13.1 Simulation Training
The radar should be equipped with a Japanese standard simulation training device. 3.13.2 Random accessories, tools and graphic materials The radar should be provided with random accessories, tools, graphic materials and a maintenance sheet, and they should be specified in the product specifications. 3.13.3 Graphic (text) consistency
The graphic (text) materials of the radar and its accessories should maintain the consistency of graphics (text). 3.14 Performance characteristics
3.14.1 Main tactical performance
3.14. 1.1 Range
3.14. 1. 1.1 Given conditions
a. The type of reconnaissance target, speed and radar reflection equivalent cross-sectional area of the target are shown in Table 1: Table 1 Monthly target characteristics
Daily target type
Crouching soldiers
Armed soldiers on foot
Jeeps, light vehicles
Medium tanks, heavy vehicles
Helicopters
150~-300
The given detection probability is 80%, 85%, 90%, and the false alarm probability is 1x106; b.
C. Wind below level 3, line of sight conditions, clear atmosphere. 3.14.1.1.2 Detection distance
Equivalent load area
The radar shall be able to detect the target and measure the distance between the target and the coordinates of the target when scanning in a given manner. The specific requirements are specified in the product specifications.
According to the requirements of tactical, campaign and strategic reconnaissance, the detection distance requirements for similar targets are also different. According to the distance of the detection distance, it can be divided into short-range, medium-range and long-range battlefield reconnaissance radars (hereinafter referred to as short-range, medium-range and long-range). The detection distance is shown in Appendix A (reference).
3.14.1.1.3 Tracking distance
When the radar works in tracking mode, the longest distance at which it can continue to track the target after discovering the target is the tracking distance of the radar. The specific requirements are specified in the product specifications.
3.14. 1. 1. 4 Minimum operating distance
a. Short range: not more than 50m;
b. Medium range: not more than 300m, if pulse pressure system is adopted, the product specification shall be stipulated;- 4 -
SJ 20739 --1999
c. Long range: not more than 2km, if pulse music system is adopted, the product specification shall be stipulated. 3.14.1.1.5 Angular search range
a Method: 00~360°;
b. Pitch: short-range, medium-range: -10°～25°; long-range: -35°～5°
3.14.1.2 Beam working mode
3. 14. 1. 2. 1 Azimuth
a: short-range, medium-range: automatic or manual implementation of sector scanning or circular scanning; b. Long-range: remote control or program control implementation of sector scanning or circular scanning. 3.14.1. 2. 2 Pitch
a. Short-range, medium-range: manual or key control adjustment; b. Long-range: remote control or program control adjustment.
3.14.1.2.3 Scanning speed
6~-36 (°) /s.
3.14.1.2.4 Pitch adjustment (program control) speed 1~-2 (°) /s.
3. t4.1.3 Measurement performance
3.14.1.3.1 Measurement dimensions
Distance, azimuth. If there are other special requirements, they should be specified in the product specifications. 3.14.1.3.2 Measurement accuracy
a. Short-range, medium-range
Distance accuracy: not more than 20m:
Azimuth accuracy: 1/3 to 1/2 of the beam width. b. Long-range
Distance accuracy: not more than 100m:
Azimuth accuracy: 1/3 to 1/2 of the beam width 3.14.1.3.3 Resolution
3.14.1.3.3.1 Distance resolution
a. Short-range, medium-range: 25 to 50 m;
b. Long range
MTD or MTI I. Working mode: 50~150 m: Imaging working mode: 3~30 m, or as specified by product specifications. 3.14.1.3.3.2 Azimuth resolution
Specified by product specifications.
3.14.1.4 Anti-interference capability
3.14.1.4.1 Anti-suppressive noise interference capability The radar's ability to resist suppressive noise interference is generally divided into three levels: Level 1 interference intensity is mild interference, and the interference area is about one horizontal beam width. Level 2 interference, the intensity is relatively severe interference, and the interference area reaches several horizontal beam widths. Level 3 interference, the intensity is severe interference, and the interference area is more than a dozen beam widths. Specific requirements are specified in the product specifications.
HKAoNrKAca
SJ 20739—1999
3.14.1.4.2 Anti-interference capability of asynchronous pulses at the same frequency The radar’s anti-interference capability of asynchronous pulses at the same frequency shall be specified in the product specifications. 3.14.1.4.3 Anti-interference capability of ground clutter
The suppression ratio of the radar to the clutter of fixed ground objects is: 20, 35, 40, 45, 50dB, and the specific value shall be specified in the product specifications.
3.14.1.4.4: Anti-interference capability of rain (snow) The radar’s anti-interference capability of rain (snow) shall be specified in the product specifications. 3.14.1.4.5 Frequency conversion capability
The radar shall have the ability to convert frequency, and the frequency conversion method and specific requirements shall be specified in the product specifications. 3.14.1.4.6 Polarization change capability
The radar shall have the ability to change polarization, and its polarization form and polarization change method shall be specified by the product specifications. 3.14.1.4.7 Other anti-interference capabilities
Specified by the product specifications.
3.14.1.5 Rapid response capability
It shall be required to meet the requirements of combat use when demonstrating and determining the combat technical indicators: the time from power-on to normal operation, radar installation time, system self-test time and other rapid response capability indicators shall be specified in the product specifications according to the combat use requirements. 3.14.1.6 Remote control capability
When the radar terminal and other subsystems of the radar work separately, it shall have remote control capability, and the remote control distance shall be: a. Short range, medium range: not less than 30 m;
b. Long range: specified by the product specifications.
3.14.1.7 Terminal display recording
3.14.1.7.1 Image display
The radar should be able to display images (dynamic national standard coordinates, motion trajectory, motion parameters and ground background), symbols and tables.
3.14.1.7.2 Display
a. Short-range and medium-range: select flat-panel or TV raster scanning system B-type display b. Long-range: select TV optical scanning system integrated display or other multiple displays. 3.14.1.7.3 The display screen (diagonal) size is preferably 13, 18, 23, 31, 37, 46, 51, 53cm. 3.14.1.7.4 Data recording mode
Flat automatic or automatic.
3.14.1.7.5 Other recording requirements
Other recording requirements such as capacity, rate, accuracy, input and output mode, etc., shall be specified by the product specifications. 3.14.1.7.6 Intelligence transmission capability
Wireless or wired, image transmission or digital transmission. Including the number of routes, speed, distance, bit error rate, etc. are specified by the product specifications. 3.14.1.8 Marking nature identification capability
The radar should have audio equipment such as headphones and speakers, and should also be equipped with automatic sound and light marking alarm devices. 3.14.1.9 Continuous working time
The radar should be turned on continuously for no less than 24 hours.
3.14.1.10 Power supply mode for the whole machine
a. Short range: battery.
b, Medium range: battery;
Gasoline generator set/DC regulated power supply:
Mains power/DC regulated power supply.
SJ 20739--1999
c Long range: should comply with the relevant provisions of GJB181. 3.14.1.10.1 Battery
a. Voltage and level: High energy, small size and light weight batteries should be selected. The specific value is specified by the product specification. b. Maintenance requirements: Maintenance-free.
G, Others: Should comply with the provisions of GJB516. 3.14.1.10.2 DC regulated power supply
a, Input: gasoline generator set or mains, 220V/50Hz or 110V/400Hz (air-based) single phase: b, Output level and capacity: Specified by product specifications: Function: Power supply for radar, charge battery, or charge while powering: c.
d, Volume and weight: Specified by product specifications: e. Others: Should comply with the provisions of SJ2811. 3.14.1.10.3 Gasoline generator set
Should comply with the provisions of GJB425.
3.14.1.11 Total power consumption
Specified by product specifications.
3.14.2 Main technical performance
3.14.2.1 Working frequency band and bandwidth
3. 14. 2. 1. 1 Working frequency band
Selected from A, I, J, K, M bands, the specific requirements are specified in the product specifications. 3.14.2.1.2 Working bandwidth
Selected from 200, 300, 400, 500, 600, 800 MHz, the specific value is specified in the product specifications. 3.14.2.2 Antenna subsystem
3. 14. 2.2. 1T The working bandwidth
should be at least 20% greater than the working bandwidth given in the radar product specifications, the specific requirements are specified in the product specifications. 3.14.2.2.2 Gain
a. Long-range, medium-range: 18~32dB:
b, long-range: not less than 38 dB
3.14.2.2.3 Beamwidth
a. Azimuth
Short-range, medium-range: not more than -20 dB:
Long-range: not less than -35 dB.
b. Elevation
Short-range, medium-range: not more than -18 dB
Long-range: not more than -30dB.
3.14.2.2.4 Beamwidth
a.: Short-range: 4°~6°
TTKAoNrKAca-
b. Medium-range, long-range
Azimuth: 19~3°
Elevation: 4°~6°.
3.14.2.2.5 Polarization mode
SJ 20739—1999
Vertical linear polarization, horizontal linear polarization (sea), circular polarization, artificial change. If there are special requirements, they shall be specified by the product specifications.
3. 14.2.2. 6 Others
Should comply with the provisions of Article 3.12.2.1 of GJB 74A 3.14.2.3 Transmitter subsystem
3.14.2.3.1 Transmitter type and operating frequency range a. Transmitter type: master oscillator or master oscillator amplifier, specified by the product specifications: b. Operating frequency range: specified by the product specifications. 3.14.2.3.2 Operating frequency range and output power shall be specified by the product specifications.
3.14.2.3.3 Transmitter waveform
a. Short-range: FM continuous wave, PN continuous wave, S-Pulse wave, specific requirements are specified by product specifications b. Medium-range, long-range: RF pulse wave, specific requirements are specified by product specifications. 3.14.2.3.4 Transmitted signal quality
Frequency (phase) stability of the transmitted signal: the time, frequency, amplitude jitter, and transmission noise of the transmitted waveform are specified by product specifications.
3. t4.2.3.5 Others
Other requirements such as security and enterprise protection of the transmitting subsystem shall comply with the provisions of Article 3.12.2.3 of GJB74A. 3.14.2.4 Receiving subsystem
3.14.2.4.1 Noise coefficient
a Short-range, medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Select from 30, 60, 90, 120MHz, or as specified by product specifications. 3.14.2.4.3 Intermediate frequency bandwidth and amplitude-frequency and phase-frequency characteristics shall be specified by product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements shall be specified by product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) Oscillator phase noise spectral density, output power, phasing backwidth (compensation range) and amplitude and other requirements shall be specified by product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the working bandwidth)8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (agile) time and frequency change (agile) interval are specified by product specifications. And it should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor of moving targets is preferably 25, 40, 50, 60 dB, or as specified by the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified by the product specification. 3. 14.2.5. 4 Others
Clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation requirements are specified by the product specification. And should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca1T operating bandwidth
Should be at least 20% greater than the operating bandwidth given in the radar product specification. The specific requirements are specified in the product specification. 3.14.2.2.2 Gain
a. Long-range, medium-range: 18~32dB:
b, long-range: not less than 38 dB
3.14.2.2.3 Flap current bZxz.net
a. Azimuth plane
Short-range, medium-range: not more than -20 dB:
Long-range: not more than -35 dB.
b. Elevation plane
Short-range, medium-range: not more than -18 dB
Long-range: not more than -30dB.
3.14.2.2.4 Beam width
a.: Short range: 4°~6°
TTKAoNrKAca-
b. Medium range, long range
Azimuth: 19～3°
Elevation: 4°～6°.
3.14.2.2.5 Polarization mode
SJ 20739—1999
Vertical linear polarization, horizontal linear polarization (towards the sea), circular polarization, artificial change. If there are special requirements, they shall be specified by the product specifications.
3. 14.2.2. 6 Others
Should comply with the provisions of Article 3.12.2.1 of GJB 74A 3.14.2.3 Transmitter subsystem
3.14.2.3.1 Transmitter type and operating frequency range a. Transmitter type: master oscillator or master oscillator amplifier, specified by product specifications: b. Operating frequency range: specified by product specifications. 3.14.2.3.2 Operating frequency range and output power are specified by product specifications.
3.14.2.3.3 Transmitter waveform
a. Short range: frequency modulated continuous wave, pseudo code continuous wave, radio pulse wave, specific requirements are specified by product specifications b. Medium range, long range: radio frequency pulse wave, specific requirements are specified by product specifications. 3.14.2.3.4 Quality of transmitted signal
Frequency (phase) stability of transmitted signal: Time, frequency, amplitude jitter, and transmission noise of the transmitted waveform are specified by the product specifications.
3. t4.2.3.5 Others
Other requirements of the transmission subsystem such as safety and enterprise protection shall comply with the provisions of Article 3.12.2.3 of GJB74A. 3.14.2.4 Receiving subsystem
3.14.2.4.1 Noise coefficient
a Short-range and medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Select from 30, 60, 90, and 120MHz, or as specified by the product specifications. 3.14.2.4.3 Intermediate video bandwidth and amplitude-frequency and phase-frequency characteristics are specified by the product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements are specified by the product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) The phase noise spectral density, output power, phase backwidth (compensation range) and amplitude of the oscillator are specified by the product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression degree
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the operating bandwidth) 8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (abrupt) time and frequency change (abrupt) interval are specified by product specifications. And should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor for moving targets is preferably 25, 40, 50, 60 dB, or as specified in the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified in the product specification. 3. 14.2.5. 4 Others
The requirements for clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation are specified in the product specification. And they should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca1T operating bandwidth
Should be at least 20% greater than the operating bandwidth given in the radar product specification. The specific requirements are specified in the product specification. 3.14.2.2.2 Gain
a. Long-range, medium-range: 18~32dB:
b, long-range: not less than 38 dB
3.14.2.2.3 Flap current
a. Azimuth plane
Short-range, medium-range: not more than -20 dB:
Long-range: not more than -35 dB.
b. Elevation plane
Short-range, medium-range: not more than -18 dB
Long-range: not more than -30dB.
3.14.2.2.4 Beam width
a.: Short range: 4°~6°
TTKAoNrKAca-
b. Medium range, long range
Azimuth: 19～3°
Elevation: 4°～6°.
3.14.2.2.5 Polarization mode
SJ 20739—1999
Vertical linear polarization, horizontal linear polarization (towards the sea), circular polarization, artificial change. If there are special requirements, they shall be specified by the product specifications.
3. 14.2.2. 6 Others
Should comply with the provisions of Article 3.12.2.1 of GJB 74A 3.14.2.3 Transmitter subsystem
3.14.2.3.1 Transmitter type and operating frequency range a. Transmitter type: master oscillator or master oscillator amplifier, specified by product specifications: b. Operating frequency range: specified by product specifications. 3.14.2.3.2 Operating frequency range and output power are specified by product specifications.
3.14.2.3.3 Transmitter waveform
a. Short range: frequency modulated continuous wave, pseudo code continuous wave, radio pulse wave, specific requirements are specified by product specifications b. Medium range, long range: radio frequency pulse wave, specific requirements are specified by product specifications. 3.14.2.3.4 Quality of transmitted signal
Frequency (phase) stability of transmitted signal: Time, frequency, amplitude jitter, and transmission noise of the transmitted waveform are specified by the product specifications.
3. t4.2.3.5 Others
Other requirements of the transmission subsystem such as safety and enterprise protection shall comply with the provisions of Article 3.12.2.3 of GJB74A. 3.14.2.4 Receiving subsystem
3.14.2.4.1 Noise coefficient
a Short-range and medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Select from 30, 60, 90, and 120MHz, or as specified by the product specifications. 3.14.2.4.3 Intermediate video bandwidth and amplitude-frequency and phase-frequency characteristics are specified by the product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements are specified by the product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) The phase noise spectral density, output power, phase backwidth (compensation range) and amplitude of the oscillator are specified by the product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression degree
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the operating bandwidth) 8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (abrupt) time and frequency change (abrupt) interval are specified by product specifications. And should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor for moving targets is preferably 25, 40, 50, 60 dB, or as specified in the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified in the product specification. 3. 14.2.5. 4 Others
The requirements for clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation are specified in the product specification. And they should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca1 Noise coefficient
a Short-range, medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Selected from 30, 60, 90, 120MHz, or specified by product specifications. 3.14.2.4.3 Intermediate frequency bandwidth and amplitude-frequency and phase-frequency characteristics shall be specified by product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements shall be specified by product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) Oscillator phase noise spectral density, output power, phase backwidth (compensation range) and amplitude and other requirements shall be specified by product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the working bandwidth)8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (agile) time and frequency change (agile) interval are specified by product specifications. And it should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor of moving targets is preferably 25, 40, 50, 60 dB, or as specified by the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified by the product specification. 3. 14.2.5. 4 Others
Clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation requirements are specified by the product specification. And should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca1 Noise coefficient
a Short-range, medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Selected from 30, 60, 90, 120MHz, or specified by product specifications. 3.14.2.4.3 Intermediate frequency bandwidth and amplitude-frequency and phase-frequency characteristics shall be specified by product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements shall be specified by product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) Oscillator phase noise spectral density, output power, phase backwidth (compensation range) and amplitude and other requirements shall be specified by product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the working bandwidth)8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (agile) time and frequency change (agile) interval are specified by product specifications. And it should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor of moving targets is preferably 25, 40, 50, 60 dB, or as specified by the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified by the product specification. 3. 14.2.5. 4 Others
Clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation requirements are specified by the product specification. And should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.
SJ20739-—1999
General specification for battlefield reconnaissance radar
General specification for battlefield reconnaissance radars1999-11-10Release
1999-12-01Implementation
Approved by the Ministry of Information Industry of the People's Republic of China1 Scope
1.1 Subject matter
1.2 Scope of application
2 Reference documents
3 Requirements
3.1 Qualification appraisal
Design and structure
Appearance quality
3.4 Size
Marking and code
3.7 Reliability
Maintainability
Man-machine-environment system engineering
Safety
Electromagnetic compatibility
Mobility||t t||3.13 Comprehensive guarantee capability
Performance characteristics
3.15 Environmental requirements
4 Quality assurance regulations
Inspection responsibilities
Inspection classification
Inspection conditions
Identification inspection
Quality consistency inspection
Packaging inspection
Test methods
5 Delivery preparation
5.1 Sealing and packaging
5.3 Transportation and storage
5.4 Marking
iKAoNrKAca-
（16)
6.1 Intended use
6.2 Contents of order documents
Appendix A Detection distance of battlefield reconnaissance radar (reference).........+..
1 Scope
General specification for battlefield reconnaissance radars, military standard of the People's Republic of China's electronics industry
General specification for battlefield reconnaissance radars
1. Subject content
SJ 20739--1999
This specification specifies the requirements, quality assurance regulations and delivery preparation for battlefield reconnaissance radars (hereinafter referred to as radars). 1.2 Scope of application
This specification applies to various short-range, medium-range and long-range battlefield reconnaissance radars for reconnaissance and monitoring of ground moving targets. Shore-to-sea reconnaissance radars can also refer to this specification. This specification does not apply to reconnaissance radars with calibration functions. 2 Reference Documents
GB/T14691--93 Technical Drawing Font
GJB74A--98 General Specification for Military Ground RadarGJB150.1~20-86 Environmental Test Methods for Military EquipmentGJB151A--96 Requirements for Electromagnetic Emission and Sensitivity of Military Equipment and SubsystemsGJB152A--96 Measurement of Electromagnetic Emission and Sensitivity of Military Equipment and SubsystemsGJB179A-96 Counting Sampling Inspection Procedures and TablesGJB181--86 Aircraft Power Supply Characteristics and Requirements for Electrical EquipmentGJB219A-94 General Specification for Military Communication VehiclesGJB425-88 General Technical Conditions for AC Power Frequency Gasoline Generator SetsGJB450-88 General Outline for Reliability of Equipment Development and ProductionGJB516-88 Technical Conditions for Lead-acid Batteries for Military VehiclesGJB613-88 Technical conditions for ground radar terminal equipment GJB1062-91 General requirements for ergonomic design of military visual displays GJB1289-91 Test methods for tactical performance of battlefield reconnaissance radars GJB1298-91 Maintainability evaluation and test methods for general radars and directors GJB1854-93 Model specification and numbering requirements for ordnance equipment GJB/Z9001-96 Quality system-Quality assurance model for design, development, production, installation and service SJ2811--87 General DC stabilized power supply
SJ20740-1999 Performance test methods for battlefield reconnaissance radars Issued by the Ministry of Information Industry of the People's Republic of China on November 10, 1999
Implementation on December 1, 1999
3 Requirements
3.1 Qualification appraisal
SJ 20739-1999
Products submitted in accordance with this specification shall be products that have passed the appraisal or have been approved for finalization. 3.2 Design and Structure
The design and structure of the radar shall comply with the provisions of Article 3.2 of GJB74A. The design and structural requirements of key parts and important parts shall be specified by the product specifications. 3.3 Appearance Quality
a. The appearance quality shall comply with the provisions of Article 3.3 of GIB74A: b. Switches, knobs, buttons, hand wheels, operating balls (rods), etc. shall be flexible, convenient, and have a good feel, and fasteners shall not be loose.
3.4 Dimensions
The dimensions of each radar unit shall be specified by the product specifications. 3.5 Weight
The weight of each radar unit shall be specified by the product specifications. 3.6 Marking and Code
The marking and code shall comply with the provisions of Article 3.7 of GJB74A. 3.7 Reliability
3.7.1 Mean Time Between Failures (MTBF): not less than 300h. 3.7.2 The success rate of one-time startup after marching: not less than 90%. 3.8 Maintainability
3.8.1 Automatic fault detection
The radar should be equipped with built-in self-test equipment (BITE) that can perform functional inspection, status test, fault detection, fault alarm indication and locate the field replaceable unit. Their working process and detection and positioning results should be automatically displayed by characters. 3.8.2 Basic-level maintenance
a. Fault detection method: BITE plus auxiliary monitoring: b. Fault detection rate: not less than 95%
C. Fault isolation rate: not less than 90%
d. Fault false alarm rate: not more than 2x10-2/h, 3.8.3 The mean time to repair (MTTR) of basic-level faults should not exceed 30 min.
3.8.4 Interchangeability
The random spare parts (units, modules, parts, components, complete parts and key components) of the radar with the same function should have complete physical interchangeability. Among them, after the field replaceable units are replaced, no adjustment should be required, and the tactical and technical performance will not be affected.
3.8.5 Preventive maintenance cycle
a. Grassroots level: 15d;
b. Relay level: 0.5a:
c. Base level: 2~4ai
d. Special maintenance requirements: specified by product specifications. - 2 -
3.9 Man-machine-environment system engineering
SJ 20739--1999
Specified by product specifications and shall comply with the provisions of Article 3.9 of GJB74A. 3.10 Safety
Specified by product specifications and shall comply with the provisions of Article 3.10 of GJB74A. 3.11 Electromagnetic compatibility
The electromagnetic emission and sensitivity requirements of the radar shall comply with the relevant provisions of item 5 in table 1 of GJB151A. The tailoring of the item is specified by the product specification.
3.12 Mobility
3.12.1 Transportability
The radar shall be suitable for land, sea and air transportation such as vehicles, ships and airplanes. For short-range and medium-range radars, it shall be possible to carry people on horseback into the position. The specific requirements are specified in the product specification. 3.12.2 Multi-platform installation
For short-range and medium-range radars, it shall be suitable for multiple platform installation methods such as tripods, lifting frames, roofs of light vehicles and unmanned reconnaissance aircrafts; for long-range radars, it shall be suitable for loading on multiple aerial platforms such as helicopters, balloons, airplanes and airships. The specific loading form is specified by the product specification.
3.12.3 Setting up and disassembling
a: Land-based battlefield reconnaissance radar
Setting up time: 3~20min;
Disassembling time: 2~15min:
b. Airborne battlefield reconnaissance radar
Specified by product specifications.
3.12.4 Raising frame
Structural form: lifting or folding type:
b. Lifting method: hydraulic automatic, semi-automatic or manual operationc. Lifting height and setting up and disassembling time:Specified by product specificationsd. Transportation method: horizontal trailer:
e. Others:Should meet the tactical requirements of the weapon system. 3.12.5 Radar carrier
a. General requirements
Should comply with the provisions of Chapter 3 of GJB 219A.
b. Special requirements
Specified by product specifications.
3.12.6 Lifting platform
3.12.6.1 Category Model
8: Tethered balloon:
b. Rotating remote control aircraft:
d. Helicopter:
e Fixed-wing aircraft:
f. Airship.
KAoNrKAca-
3.12.6.2 Selection Principles
SJ 20739—1999
a. Working altitude, endurance (hovering) time, and effective load are specified by product specifications. b. Good maneuverability and concealment
C. Strong combat survivability;
d. Economical.
3.13 Comprehensive Support Capability
3.13.1 Simulation Training
The radar should be equipped with a Japanese standard simulation training device. 3.13.2 Random accessories, tools and graphic materials The radar should be provided with random accessories, tools, graphic materials and a maintenance sheet, and they should be specified in the product specifications. 3.13.3 Graphic (text) consistency
The graphic (text) materials of the radar and its accessories should maintain the consistency of graphics (text). 3.14 Performance characteristics
3.14.1 Main tactical performance
3.14. 1.1 Range
3.14. 1. 1.1 Given conditions
a. The type of reconnaissance target, speed and radar reflection equivalent cross-sectional area of the target are shown in Table 1: Table 1 Monthly target characteristics
Daily target type
Crouching soldiers
Armed soldiers on foot
Jeeps, light vehicles
Medium tanks, heavy vehicles
Helicopters
150~-300
The given detection probability is 80%, 85%, 90%, and the false alarm probability is 1x106; b.
C. Wind below level 3, line of sight conditions, clear atmosphere. 3.14.1.1.2 Detection distance
Equivalent load area
The radar shall be able to detect the target and measure the distance between the target and the coordinates of the target when scanning in a given manner. The specific requirements are specified in the product specifications.
According to the requirements of tactical, campaign and strategic reconnaissance, the detection distance requirements for similar targets are also different. According to the distance of the detection distance, it can be divided into short-range, medium-range and long-range battlefield reconnaissance radars (hereinafter referred to as short-range, medium-range and long-range). The detection distance is shown in Appendix A (reference).
3.14.1.1.3 Tracking distance
When the radar works in tracking mode, the longest distance at which it can continue to track the target after discovering the target is the tracking distance of the radar. The specific requirements are specified in the product specifications.
3.14. 1. 1. 4 Minimum operating distance
a. Short range: not more than 50m;
b. Medium range: not more than 300m, if pulse pressure system is adopted, the product specification shall be stipulated;- 4 -
SJ 20739 --1999
c. Long range: not more than 2km, if pulse music system is adopted, the product specification shall be stipulated. 3.14.1.1.5 Angular search range
a Method: 00~360°;
b. Pitch: short-range, medium-range: -10°～25°; long-range: -35°～5°
3.14.1.2 Beam working mode
3. 14. 1. 2. 1 Azimuth
a: short-range, medium-range: automatic or manual implementation of sector scanning or circular scanning; b. Long-range: remote control or program control implementation of sector scanning or circular scanning. 3.14.1. 2. 2 Pitch
a. Short-range, medium-range: manual or key control adjustment; b. Long-range: remote control or program control adjustment.
3.14.1.2.3 Scanning speed
6~-36 (°) /s.
3.14.1.2.4 Pitch adjustment (program control) speed 1~-2 (°) /s.
3. t4.1.3 Measurement performance
3.14.1.3.1 Measurement dimensions
Distance, azimuth. If there are other special requirements, they should be specified in the product specifications. 3.14.1.3.2 Measurement accuracy
a. Short-range, medium-range
Distance accuracy: not more than 20m:
Azimuth accuracy: 1/3 to 1/2 of the beam width. b. Long-range
Distance accuracy: not more than 100m:
Azimuth accuracy: 1/3 to 1/2 of the beam width 3.14.1.3.3 Resolution
3.14.1.3.3.1 Distance resolution
a. Short-range, medium-range: 25 to 50 m;
b. Long range
MTD or MTI I. Working mode: 50~150 m: Imaging working mode: 3~30 m, or as specified by product specifications. 3.14.1.3.3.2 Azimuth resolution
Specified by product specifications.
3.14.1.4 Anti-interference capability
3.14.1.4.1 Anti-suppressive noise interference capability The radar's ability to resist suppressive noise interference is generally divided into three levels: Level 1 interference intensity is mild interference, and the interference area is about one horizontal beam width. Level 2 interference, the intensity is relatively severe interference, and the interference area reaches several horizontal beam widths. Level 3 interference, the intensity is severe interference, and the interference area is more than a dozen beam widths. Specific requirements are specified in the product specifications.
HKAoNrKAca
SJ 20739—1999
3.14.1.4.2 Anti-interference capability of asynchronous pulses at the same frequency The radar’s anti-interference capability of asynchronous pulses at the same frequency shall be specified in the product specifications. 3.14.1.4.3 Anti-interference capability of ground clutter
The suppression ratio of the radar to the clutter of fixed ground objects is: 20, 35, 40, 45, 50dB, and the specific value shall be specified in the product specifications.
3.14.1.4.4: Anti-interference capability of rain (snow) The radar’s anti-interference capability of rain (snow) shall be specified in the product specifications. 3.14.1.4.5 Frequency conversion capability
The radar shall have the ability to convert frequency, and the frequency conversion method and specific requirements shall be specified in the product specifications. 3.14.1.4.6 Polarization change capability
The radar shall have the ability to change polarization, and its polarization form and polarization change method shall be specified by the product specifications. 3.14.1.4.7 Other anti-interference capabilities
Specified by the product specifications.
3.14.1.5 Rapid response capability
It shall be required to meet the requirements of combat use when demonstrating and determining the combat technical indicators: the time from power-on to normal operation, radar installation time, system self-test time and other rapid response capability indicators shall be specified in the product specifications according to the combat use requirements. 3.14.1.6 Remote control capability
When the radar terminal and other subsystems of the radar work separately, it shall have remote control capability, and the remote control distance shall be: a. Short range, medium range: not less than 30 m;
b. Long range: specified by the product specifications.
3.14.1.7 Terminal display recording
3.14.1.7.1 Image display
The radar should be able to display images (dynamic national standard coordinates, motion trajectory, motion parameters and ground background), symbols and tables.
3.14.1.7.2 Display
a. Short-range and medium-range: select flat-panel or TV raster scanning system B-type display b. Long-range: select TV optical scanning system integrated display or other multiple displays. 3.14.1.7.3 The display screen (diagonal) size is preferably 13, 18, 23, 31, 37, 46, 51, 53cm. 3.14.1.7.4 Data recording mode
Flat automatic or automatic.
3.14.1.7.5 Other recording requirements
Other recording requirements such as capacity, rate, accuracy, input and output mode, etc., shall be specified by the product specifications. 3.14.1.7.6 Intelligence transmission capability
Wireless or wired, image transmission or digital transmission. Including the number of routes, speed, distance, bit error rate, etc. are specified by the product specifications. 3.14.1.8 Marking nature identification capability
The radar should have audio equipment such as headphones and speakers, and should also be equipped with automatic sound and light marking alarm devices. 3.14.1.9 Continuous working time
The radar should be turned on continuously for no less than 24 hours.
3.14.1.10 Power supply mode for the whole machine
a. Short range: battery.
b, Medium range: battery;
Gasoline generator set/DC regulated power supply:
Mains power/DC regulated power supply.
SJ 20739--1999
c Long range: should comply with the relevant provisions of GJB181. 3.14.1.10.1 Battery
a. Voltage and level: High energy, small size and light weight batteries should be selected. The specific value is specified by the product specification. b. Maintenance requirements: Maintenance-free.
G, Others: Should comply with the provisions of GJB516. 3.14.1.10.2 DC regulated power supply
a, Input: gasoline generator set or mains, 220V/50Hz or 110V/400Hz (air-based) single phase: b, Output level and capacity: Specified by product specifications: Function: Power supply for radar, charge battery, or charge while powering: c.
d, Volume and weight: Specified by product specifications: e. Others: Should comply with the provisions of SJ2811. 3.14.1.10.3 Gasoline generator set
Should comply with the provisions of GJB425.
3.14.1.11 Total power consumption
Specified by product specifications.
3.14.2 Main technical performance
3.14.2.1 Working frequency band and bandwidth
3. 14. 2. 1. 1 Working frequency band
Selected from A, I, J, K, M bands, the specific requirements are specified in the product specifications. 3.14.2.1.2 Working bandwidth
Selected from 200, 300, 400, 500, 600, 800 MHz, the specific value is specified in the product specifications. 3.14.2.2 Antenna subsystem
3. 14. 2.2. 1T The working bandwidth
should be at least 20% greater than the working bandwidth given in the radar product specifications, the specific requirements are specified in the product specifications. 3.14.2.2.2 Gain
a. Long-range, medium-range: 18~32dB:
b, long-range: not less than 38 dB
3.14.2.2.3 Beamwidth
a. Azimuth
Short-range, medium-range: not more than -20 dB:
Long-range: not less than -35 dB.
b. Elevation
Short-range, medium-range: not more than -18 dB
Long-range: not more than -30dB.
3.14.2.2.4 Beamwidth
a.: Short-range: 4°~6°
TTKAoNrKAca-
b. Medium-range, long-range
Azimuth: 19~3°
Elevation: 4°~6°.
3.14.2.2.5 Polarization mode
SJ 20739—1999
Vertical linear polarization, horizontal linear polarization (sea), circular polarization, artificial change. If there are special requirements, they shall be specified by the product specifications.
3. 14.2.2. 6 Others
Should comply with the provisions of Article 3.12.2.1 of GJB 74A 3.14.2.3 Transmitter subsystem
3.14.2.3.1 Transmitter type and operating frequency range a. Transmitter type: master oscillator or master oscillator amplifier, specified by the product specifications: b. Operating frequency range: specified by the product specifications. 3.14.2.3.2 Operating frequency range and output power shall be specified by the product specifications.
3.14.2.3.3 Transmitter waveform
a. Short-range: FM continuous wave, PN continuous wave, S-Pulse wave, specific requirements are specified by product specifications b. Medium-range, long-range: RF pulse wave, specific requirements are specified by product specifications. 3.14.2.3.4 Transmitted signal quality
Frequency (phase) stability of the transmitted signal: the time, frequency, amplitude jitter, and transmission noise of the transmitted waveform are specified by product specifications.
3. t4.2.3.5 Others
Other requirements such as security and enterprise protection of the transmitting subsystem shall comply with the provisions of Article 3.12.2.3 of GJB74A. 3.14.2.4 Receiving subsystem
3.14.2.4.1 Noise coefficient
a Short-range, medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Select from 30, 60, 90, 120MHz, or as specified by product specifications. 3.14.2.4.3 Intermediate frequency bandwidth and amplitude-frequency and phase-frequency characteristics shall be specified by product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements shall be specified by product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) Oscillator phase noise spectral density, output power, phasing backwidth (compensation range) and amplitude and other requirements shall be specified by product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the working bandwidth)8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (agile) time and frequency change (agile) interval are specified by product specifications. And it should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor of moving targets is preferably 25, 40, 50, 60 dB, or as specified by the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified by the product specification. 3. 14.2.5. 4 Others
Clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation requirements are specified by the product specification. And should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca1T operating bandwidth
Should be at least 20% greater than the operating bandwidth given in the radar product specification. The specific requirements are specified in the product specification. 3.14.2.2.2 Gain
a. Long-range, medium-range: 18~32dB:
b, long-range: not less than 38 dB
3.14.2.2.3 Flap current bZxz.net
a. Azimuth plane
Short-range, medium-range: not more than -20 dB:
Long-range: not more than -35 dB.
b. Elevation plane
Short-range, medium-range: not more than -18 dB
Long-range: not more than -30dB.
3.14.2.2.4 Beam width
a.: Short range: 4°~6°
TTKAoNrKAca-
b. Medium range, long range
Azimuth: 19～3°
Elevation: 4°～6°.
3.14.2.2.5 Polarization mode
SJ 20739—1999
Vertical linear polarization, horizontal linear polarization (towards the sea), circular polarization, artificial change. If there are special requirements, they shall be specified by the product specifications.
3. 14.2.2. 6 Others
Should comply with the provisions of Article 3.12.2.1 of GJB 74A 3.14.2.3 Transmitter subsystem
3.14.2.3.1 Transmitter type and operating frequency range a. Transmitter type: master oscillator or master oscillator amplifier, specified by product specifications: b. Operating frequency range: specified by product specifications. 3.14.2.3.2 Operating frequency range and output power are specified by product specifications.
3.14.2.3.3 Transmitter waveform
a. Short range: frequency modulated continuous wave, pseudo code continuous wave, radio pulse wave, specific requirements are specified by product specifications b. Medium range, long range: radio frequency pulse wave, specific requirements are specified by product specifications. 3.14.2.3.4 Quality of transmitted signal
Frequency (phase) stability of transmitted signal: Time, frequency, amplitude jitter, and transmission noise of the transmitted waveform are specified by the product specifications.
3. t4.2.3.5 Others
Other requirements of the transmission subsystem such as safety and enterprise protection shall comply with the provisions of Article 3.12.2.3 of GJB74A. 3.14.2.4 Receiving subsystem
3.14.2.4.1 Noise coefficient
a Short-range and medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Select from 30, 60, 90, and 120MHz, or as specified by the product specifications. 3.14.2.4.3 Intermediate video bandwidth and amplitude-frequency and phase-frequency characteristics are specified by the product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements are specified by the product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) The phase noise spectral density, output power, phase backwidth (compensation range) and amplitude of the oscillator are specified by the product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression degree
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the operating bandwidth) 8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (abrupt) time and frequency change (abrupt) interval are specified by product specifications. And should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor for moving targets is preferably 25, 40, 50, 60 dB, or as specified in the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified in the product specification. 3. 14.2.5. 4 Others
The requirements for clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation are specified in the product specification. And they should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca1T operating bandwidth
Should be at least 20% greater than the operating bandwidth given in the radar product specification. The specific requirements are specified in the product specification. 3.14.2.2.2 Gain
a. Long-range, medium-range: 18~32dB:
b, long-range: not less than 38 dB
3.14.2.2.3 Flap current
a. Azimuth plane
Short-range, medium-range: not more than -20 dB:
Long-range: not more than -35 dB.
b. Elevation plane
Short-range, medium-range: not more than -18 dB
Long-range: not more than -30dB.
3.14.2.2.4 Beam width
a.: Short range: 4°~6°
TTKAoNrKAca-
b. Medium range, long range
Azimuth: 19～3°
Elevation: 4°～6°.
3.14.2.2.5 Polarization mode
SJ 20739—1999
Vertical linear polarization, horizontal linear polarization (towards the sea), circular polarization, artificial change. If there are special requirements, they shall be specified by the product specifications.
3. 14.2.2. 6 Others
Should comply with the provisions of Article 3.12.2.1 of GJB 74A 3.14.2.3 Transmitter subsystem
3.14.2.3.1 Transmitter type and operating frequency range a. Transmitter type: master oscillator or master oscillator amplifier, specified by product specifications: b. Operating frequency range: specified by product specifications. 3.14.2.3.2 Operating frequency range and output power are specified by product specifications.
3.14.2.3.3 Transmitter waveform
a. Short range: frequency modulated continuous wave, pseudo code continuous wave, radio pulse wave, specific requirements are specified by product specifications b. Medium range, long range: radio frequency pulse wave, specific requirements are specified by product specifications. 3.14.2.3.4 Quality of transmitted signal
Frequency (phase) stability of transmitted signal: Time, frequency, amplitude jitter, and transmission noise of the transmitted waveform are specified by the product specifications.
3. t4.2.3.5 Others
Other requirements of the transmission subsystem such as safety and enterprise protection shall comply with the provisions of Article 3.12.2.3 of GJB74A. 3.14.2.4 Receiving subsystem
3.14.2.4.1 Noise coefficient
a Short-range and medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Select from 30, 60, 90, and 120MHz, or as specified by the product specifications. 3.14.2.4.3 Intermediate video bandwidth and amplitude-frequency and phase-frequency characteristics are specified by the product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements are specified by the product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) The phase noise spectral density, output power, phase backwidth (compensation range) and amplitude of the oscillator are specified by the product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression degree
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the operating bandwidth) 8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (abrupt) time and frequency change (abrupt) interval are specified by product specifications. And should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor for moving targets is preferably 25, 40, 50, 60 dB, or as specified in the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified in the product specification. 3. 14.2.5. 4 Others
The requirements for clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation are specified in the product specification. And they should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca1 Noise coefficient
a Short-range, medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Selected from 30, 60, 90, 120MHz, or specified by product specifications. 3.14.2.4.3 Intermediate frequency bandwidth and amplitude-frequency and phase-frequency characteristics shall be specified by product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements shall be specified by product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) Oscillator phase noise spectral density, output power, phase backwidth (compensation range) and amplitude and other requirements shall be specified by product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the working bandwidth)8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (agile) time and frequency change (agile) interval are specified by product specifications. And it should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor of moving targets is preferably 25, 40, 50, 60 dB, or as specified by the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified by the product specification. 3. 14.2.5. 4 Others
Clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation requirements are specified by the product specification. And should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca1 Noise coefficient
a Short-range, medium-range: not more than 5dB;
b Long-range: not more than 3 dB.
3.14.2.4.2 Intermediate frequency
Selected from 30, 60, 90, 120MHz, or specified by product specifications. 3.14.2.4.3 Intermediate frequency bandwidth and amplitude-frequency and phase-frequency characteristics shall be specified by product specifications.
3.14.2.4.4 Local oscillator (amplifier chain)
Local oscillator (amplifier chain) (phase) noise spectral density, operating bandwidth, output power and other requirements shall be specified by product specifications. 3.14.2.4.5 Coherent oscillator (frequency compensation oscillator) Oscillator phase noise spectral density, output power, phase backwidth (compensation range) and amplitude and other requirements shall be specified by product specifications.
3.14.2.4.6 Image frequency and combined interference suppression a. Image frequency suppression
Short range, medium range: not less than 12dB:
Long range: not less than 20 dB,
b. Combined interference (twice within the working bandwidth)8
Short range, medium range: not less than 30dB
Long range: not less than 60dB.
3.14.2.4.7 Pulse compression
SJ 20739—1999
Pulse compression signal, compression ratio, peak sidelobe level and other requirements are specified by product specifications. 3. 14. 2. 4. 8 Others
Other requirements of the receiving subsystem such as dynamic range, gain control, output polarity and amplitude, AFC search time, range, bandwidth, frequency change (agile) time and frequency change (agile) interval are specified by product specifications. And it should comply with the provisions of Article 3.12.2.4 of GJB74A.
3.14.2.5 Signal processing subsystem
3.14.2.5.1 Signal-to-noise ratio improvement factor
10~20 dB.
3.14.2.5.2 The signal-to-clutter ratio improvement factor of moving targets is preferably 25, 40, 50, 60 dB, or as specified by the product specification. 3.14.2.5.3 The moving target detection distance range is preferably 3, 6, 12, 24, 48 km, or as specified by the product specification. 3. 14.2.5. 4 Others
Clutter pattern control, adaptive frequency selection, constant false alarm and video accumulation requirements are specified by the product specification. And should comply with the provisions of Article 3.12.2.5 of GJB74A. 3.14.2.6 Terminal subsystem
3.14.2.6.1 Display screen pixels
Preferably 240×320, 480x640, 512×512, 1024×1024, 1024×1280 pixels3.14.2.6.2 Image display
a. Display mode
Select from A type, B type, PPI, PPI hollow, PPI eccentric. b. Gray scale and color
Monochrome: not less than 3 bits;
Color: 16 colors can be selected.
c. Monochrome display
Display mode: Display moving targets and various cursors at the highest brightness level, and display electrical scales and background at other levels. The background brightness is proportional to the intensity of ground clutter echoes and can be adjusted to the lowest brightness: Color: Unless otherwise specified, it should be implemented in accordance with the provisions of Article 5.7.6 of GJB1062. d. Color display
The information display format and method should comply with the provisions of Article 5.4.14 of GJB1062. e. Image zoom ratio
Preferably 2, 4, 8, 16.
3.14.2.6.3 Character table display content
Radar 1. Operation parameters, maximum range mark, day coordinates, average speed, heading (direction), batch, category, quantity, time and radar station address, station number, etc. Its characters and Chinese character characteristics should comply with the provisions of Articles 5.3, 5.4, 5.7, 5.8, and 5.10 of GJB1602. The data format is specified by the product specification. 3.14.2.6.4 Surface fire accuracy
TKANKAca
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.
- Recommended standards
- CJ 39.3-1991 Calculation method of economic and technical indicators of urban public transport Passenger ferry CJ39.3-91
- HG 3622-1999 3% Carbofuran Granules
- HG/T 3675-2000 Fluorescent brightener CXT
- GB/T 4798.3-2007 Environmental conditions existing in the application of electric and electronic products—Part 3:Stationary use at weather-protected locations
- GB/T 4458.6-2002 Methods of drawing mechanical drawings - Section views and cross-sections
- NY/T 441-2001 Apple production technical regulations
- GB/T 14677-1993 Air quality Determination of toluene, xylene and styrene by gas chromatography
- HG/T 2888-1997 Rubber Household Gloves
- GB 8481-1987 Sliding aluminum alloy windows
- GB/T 4852-2002 Test method for initial tack of pressure-sensitive adhesive tapes (rolling ball method)
- HG/T 21554.1-1995 Saddle ring packing
- GB/T 3454-1982 Definition table of interface circuits between data terminal equipment (DTE) and data circuit-terminating equipment (DCE)
- JB/T 999-1977 Hinged bolts for pipe joints
- JB/T 3235-1999 Determination of wear ratio of synthetic diamond sintered body
- HG/T 2239-1991 H06-2 Iron red, zinc yellow, iron black epoxy ester primer
Please remember: "bzxz.net" is the combination of the first letters of the Chinese pinyin of the four Chinese characters "standard download" and the international top-level domain name ".net". ©2024 Standard download websitewww.bzxz.net Mail：[email protected]