SJ 20772-2000 Specification for military laser atmospheric communication equipment
Some standard content:
Military Standard of the Electronic Industry of the People's Republic of China FL5850
SJ 20772—2000
Specification for military laser atmosphere communication equipment
Specification for military laser atmosphere signaller
2000-10-20 Issued
2000-10-20 Implementation
Approved by the Ministry of Information Industry of the People's Republic of China 1 Scope
1.1 Subject matter
1.2 Scope of application
2 Reference documents
3 Requirements
3.1 Product specification...
3.2 Qualification appraisal
3.4 Structure
3.5 Dimensions
3.6 Weight
Appearance quality
3.9 Marking and code
3.10 Mechanical technology
3.11 Safety
Maintainability
3.13 Interchangeability
3.14 Performance characteristics
3.15 Power supply||t t||3.16 Environmental requirements
3.17 Electromagnetic compatibility
3.18 Reliability
4 Quality assurance regulations
Inspection responsibilities
Inspection categories
Inspection conditions
Identification inspection
Quality consistency inspection
Packaging inspection
Inspection methods·
5 Delivery preparation
5.1 Sealing and packaging
5.2 Packing·
5.3 Transportation and storage
5.4 Standard price
6 Notes
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People's Republic of China Electronic Industry Military Standard Military Laser Atmospheric Communication Equipment Specification
Specification for military laser atmosphere signaller1Scope
1.1Subject content
SJ 20772-2000
This specification specifies the technical requirements, quality assurance provisions, delivery preparation, etc. for military laser atmosphere signallers using laser atmosphere transmission.
1.2Scope of application
This specification is applicable to laser atmosphere signallers used in outdoor environments, and laser atmosphere signallers for other purposes may also be used as a reference.
2 Reference documents
GB191—90 Packaging, storage and transportation graphic signs
GB3047.2-92 Basic dimension series of panels, racks and cabinets with a height of 44.45mm GB3047.4-86 Basic dimension series of plug-in boxes and plug-ins with a height of 44.45mm GB6431-86 Basic dimensions of bar racks for communication equipment GB7611--87 Network digital interface parameters for pulse code modulation communication systems GJB151A—97 Requirements for electromagnetic emission and sensitivity of military equipment and subsystems GrB152A—97 Measurement of electromagnetic emission and sensitivity of military equipment and subsystems GJB 179A—96 Count sample inspection procedures and tables GJB367.1--87 General technical conditions for military communication equipment Design and manufacturing requirements GJB367.2--87 General technical conditions for military communication equipment Environmental test methods GJB 367.3--87
General technical conditions for military communication equipmentReliability identification test and acceptance test methodsGeneral technical conditions for military communication equipmentAcceptance rulesGJB 367.487
GJB 367.5--87
General technical conditions for military communication equipmentPackaging, transportation and storage requirementsGeneral fire guidelines for equipment maintainability
GJB 368A—94
GJB 2072—94
Maintainability test and evaluation
ITU-T G.703Fascicle111.4-Rec.G.7033Requirements
3.1 Product specifications
The requirements for communication equipment shall comply with the provisions of this specification and relevant product specifications. If the requirements of this specification are inconsistent with the product specifications, the provisions of the product specifications shall prevail. Ministry of Information Industry of the People's Republic of China Issued on October 20, 2000 Implemented on October 20, 2000
3.2 Qualification
$J 20772—2000
Communication equipment submitted in accordance with this specification shall be products that have been qualified or approved for finalization. 3.3 Design
The design of the communication equipment shall comply with the provisions of Chapter 1 and Chapter 3 of GJB367.1. 3.3.1 Transmission rate
The information rate of the communication equipment is compatible with 128/256/512/1024/2048kb/s, and the network control information shall comply with the provisions of the product specification.
3.3.27 Operating wavelength
Communication equipment 1. The operating wavelength is 0.85~0.90m, 1.30~1.55μm. 3.3.3 Communication distance
The communication distance of the communication machine under normal air-off condition should be less than 1km. 3.3.4 Interface
The digital interface parameters of the field communication machine should comply with the provisions of GB7611 and ITU-TG.703. 3.3.5 Light source
Light source material: LD:
1. Operating wavelength: 0.85~0.96um:
Average input light power: 1W (CW):
Beam divergence angle: 0=30°×10°
3.3.6 Optical receiver
Receiving component: PIN/FET or APD:
Wavelength: 1.10~1.70 μm, 0.85~0.90 μm. 3.3.7 Optical antenna
3.3.7.1 Transmitting antenna
Light aperture: less than 150 mm:
Transmitting antenna efficiency: 0.5.
3.3.7.2 Receiving antenna
Light aperture: less than 150 mm
Receiving antenna efficiency: greater than 0.2 (including interference filter). 3.4 Structure
The structure of the communication machine shall comply with the provisions of Article 1.15 of GJB367.1. 3.5 Dimensions
The external dimensions of the communication machine shall comply with the dimension series defined in GB3047.2, GB3047.4 and 1GB6431. 3.6 Weight
The weight of the communication machine shall be specified in the product specification. 3.7 Appearance Quality
The outer surface of the communication machine should be free of dents, bumps, cracks, deformation, etc.; the coating should not bubble, crack or fall off; the metal parts should not be rusted, spotted or damaged; the fasteners should not be loose. 3.8 Color
The color of the communication machine should comply with the provisions of Article 1.20 of GJB367.1, and the colors of various signal indicators should comply with the provisions of Article 1.20 of GJB367.1
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3.9 Marking and code
SJ 20772--2000
should comply with the provisions of Article 1.21 of GJB 367.1. 3. 10 Mechanical process
should comply with the provisions of product specifications.
3.11 Safety (see 4.7.3)
3.11.1 Equipment safety
In addition to meeting the requirements of 1.8 in GJB367.1, the safety measures of communication equipment shall also meet the following requirements: All types of connectors shall have corresponding anti-misplugging measures: a.
The power input shall have polarity protection measures:
There shall be overvoltage protection:
There shall be overcurrent protection:
The rack shall have good grounding measures:
Replacing protective components shall be simple and convenient.
3. 11.2 Personal safety
3.11.2.1 Mechanical damage
The shell, corners and edges of the communication machine shall not have any burrs and sharp or blade-shaped protrusions. 3.11.2.2 Electrical damage
The shell of the communication machine shall be at the construction site potential during operation. 3.11.2.3 Optical radiation
Any part of the communication machine where optical radiation exists shall have a warning sign or text sign, an example of which is shown in Figure 1. Laser window
Avoid exposure to laser radiation emitted from this window
Graphic sign
3.12 Maintainability
Figure 1 Warning sign
The maintainability of the communication machine shall comply with the requirements of G368A. 3.13 Interchangeability
Literary sign
The interchangeability of the communication machine shall comply with the provisions of Article 1.7 of GJB367.1. Components or modules that need to be readjusted after interchange shall be stated in the product specifications. 3.14 Performance characteristics
3.14.1 Light receiving sensitivity (see 4.7.6.2) The optical receiving sensitivity shall not be less than -30dBm when the bit error rate is less than 1×10-6. 3.14.2 Bit error rate (see 4.7.6.3) The average bit error rate of the transmission system composed of the communication device shall meet the requirements of the product specification. -3-
SJ 20772—2000
3.14.3 Minimum output optical power of the light source (see 4.7.6.4) The optical output optical power of the optical transmitting light source shall not be less than 400mW. 3.14.4 Optical receiving dynamic range (see 4.7.6.5) The dynamic range of the optical receiver shall be greater than 20gB.
3.15 Power supply
a AC power supply: 220+3V, 50Hz.
b. DC voltage: 24V.
3.16 Environmental requirements
3.16.1 Temperature and relative humidity
3.16.1.1 Temperature and relative humidity requirements for communication equipment The communication equipment should be able to work normally at the temperature and humidity specified in Table 1. Table 1 Environmental requirements for communication equipment
-25 ~+55 °℃
-40~+70 °℃
3.16.1.2 Temperature and relative humidity requirements for antenna The antenna should be able to work normally at the temperature and humidity specified in Table 2. Table 2 Antenna environment temperature and humidity requirements
3.16.2 Solar radiation
-30~～+60°℃
55~+70°℃
Relative humidity
≤90%
Relative humidity
≤93%
≤90%
Should meet the test requirements specified in "404 Solar radiation test" in GJB 367.2. 3.16.3 Rainfall
Should meet the test requirements specified in "404 Rainfall test" in GJB 367.2. 3.16.4 Mold
Should meet the test requirements specified in "412
2 Mold test" in GJB 367.2. 3.16.5 Salt spray
Should meet the test requirements specified in 413 of G 367.2www.bzxz.net
3.16.6 Sand and dust
Salt spray test. Should meet the test requirements specified in 407 Sand and dust test of GJB367.2. 3.16.7 Vibration
Should meet the test requirements specified in curve Y of table 409-1 of 409 Vibration test of GJB367.2. 3.17 Magnetic compatibility
Except for special requirements of the user and clear provisions in the supply contract, the electromagnetic compatibility requirements of the communication machine shall comply with the provisions of GJB151A.
3.18 Reliability
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SJ 20772—2000
The reliability of the communication machine is expressed by the mean time between failures (MTBF), and the specific requirements are specified in the product specifications. 4 Quality Assurance Provisions
4. Inspection Responsibility
Unless otherwise specified in the contract or order, the contractor shall be responsible for all inspections specified in this specification. If necessary, the ordering party or the superior appraisal agency has the right to inspect any inspection items specified in this specification. 4.1.1 Responsibility for Conformity
The communication equipment must meet all requirements of Chapter 3 and Chapter 5. The inspections specified in this specification shall become an integral part of the contractor's entire inspection system and quality program. 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. Quality-Consistency Sampling It 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 in accordance with Article 1.8 of GJB367.4 and Article 4.7 of this standard.
4.4 Appraisal inspection
Appraisal inspection is generally carried out when the equipment is designed and produced. However, when there are major changes in the main design, components and materials of the equipment, which affect the important performance of the equipment and make the original conclusion no longer valid, appraisal inspection should also be carried out.
Appraisal inspection shall be carried out in a laboratory approved by the ordering party or the superior appraisal agency. 4.4.1 Number of samples
The number of samples shall be clearly determined in the product specification or order contract. 4.4.2 Inspection items
The appraisal inspection items shall be carried out in accordance with the provisions of Table 3. 4.4.3 Qualification criteria
When all inspection items meet the requirements of Chapter 3 and Chapter 5, the appraisal inspection is considered qualified. If any of the inspection items do not meet the specified requirements, the inspection shall be suspended. The contractor shall analyze the unqualified items, find out the causes of the defects and take corrective measures. Then the unqualified items and related items may be inspected. If all the inspection items meet the specified requirements, the identification inspection is deemed qualified. If there is still an item that does not meet the specified requirements, it is deemed unqualified. 4.4.4 Maintenance of qualified identification qualifications
In order to maintain the qualified identification inspection qualifications, the contractor shall submit test data to the competent authority every year. 4.5 Quality consistency inspection
4.5.1 Inspection grouping
Quality consistency inspection is divided into groups A, B, C and D. 4.5.2 Formation of inspection batches
The formation of inspection batches shall comply with the provisions of Article 5.4.6 of GJB179A:-
4.5.3 Group A inspection
4.6.3.1 Inspection items
Group A inspection items are shown in Table 3.
4.5.3.2 Sampling plan
SJ 20772--2000
100% of the inspection batches submitted by the contractor shall be subject to Group A inspection. The quality of the submitted batches shall be expressed by the defective rate of the batches. The acceptable rate of serious defectives is 4% and the rate of minor defectives is 10%. 4.5.3.3 Defect classification
The various defects of the products and the specific distinction of defectives shall be specified in the product specifications. 4.5.3.4 Qualification criteria
According to the inspection results, if the defective rate is equal to or less than the specified value, the batch is judged to have passed the Group A inspection; otherwise, the batch is judged to have failed the Group A inspection.
4.5.3.5 Re-inspection
For products that have failed the Group A inspection, the contractor shall analyze them, find out the causes of the defects and take corrective measures before resubmitting them for inspection. The resubmitted batch shall be separated from the new batch and marked with "resubmitted batch". If the re-inspection is qualified, the Group A inspection is judged to be qualified: otherwise, the Group A inspection is judged to be unqualified. 4.5.3.6 Sample processing
If defective products are found in the batches that have passed the Group A inspection, the contractor shall be responsible for repairing them and meet the requirements of the product specifications, and the whole batch can be delivered according to the contract or order. 4.5.4 Group B inspection
Group B inspection should be carried out on the basis of all the grids of Group A inspection. 4.5.4.1 Inspection items
Group B inspection items are shown in Table 3.
4.5.4.2 Sampling plan
4.5. 4.2.1 Sampling plan for continuous batches
The sampling plan for continuous batches shall be carried out in accordance with the provisions of GJB179A, and a normal inspection sampling plan of general inspection level ⅡI shall be adopted. The defect classification shall be specified by the product specification. The acceptable quality level (AQL) can be selected from the following values if there are other provisions:
Serious defects: 4.0, 6.5, 15:
Minor defects: 25, 40, 65.
4.5.4.2.2 Sampling plan for isolated batches
The sampling inspection of isolated batches shall be carried out in accordance with the provisions of GJB179A, and a normal inspection sampling plan shall be adopted. When the acceptance probability Pa = 10%, the limit quality (LQ) value can be selected from the following data if there is no other stipulation: serious defects: 18, 27, 42; minor defects: 11, 18, 27.
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Inspection or test items
Appearance quality
Marking and code
Safety
Optical receiving sensitivity
Bit error rate
Minimum output optical power of light source
Dynamic range
Solar radiation
Electromagnetic compatibility
24Reliability
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Identification inspection and quality consistency inspection
Quality consistency inspection
Note: "○" in the table indicates a required item, and "—" indicates an optional item. 4.5.4.3 Defect classification
shall be specified in the product specification.
4.5.4.4 Qualification Criteria
Test Method
Chapter No.
According to the inspection results, if the number of unqualified products found is not greater than the specified value AQL acceptance judgment number, the batch is judged to have passed the Group B inspection; otherwise, the batch is judged to have failed the Group B inspection. 4.5.4.5 Re-inspection
For batches that have failed the Group B inspection, the manufacturer shall analyze the batch of products, find out the reasons for the failure and take corrective measures before resubmitting them for inspection. During re-inspection, the resubmitted batch shall be separated from the new batch and marked as "resubmitted batch", and stricter inspection shall be carried out.
SJ 20772--2000
If the re-inspection is qualified, the batch is judged to have passed the Group B inspection; otherwise, the batch is judged to have failed the Group B inspection. 4.5.4.6 Sample processing
If defective products are found in the batch that has passed the Group B inspection, the contractor shall be responsible for repairing them and meet the requirements of the product specifications before they can be delivered in batches according to the contract or order. 4.5.5 Group C inspection
Group C inspection shall be carried out on products in the batches that have passed the Group A and Group B inspections. 4.5.5.1 Inspection items
The inspection items of Group C are shown in Table 3.
4.5.5.2 Sampling plan
The sampling plan shall be carried out in accordance with the provisions of GJB179A. A special level S-1 -· normal inspection sampling plan is adopted, and the defect classification is specified by the product specification. The acceptable quality level (AQL) is selected from the following data: Minor defects: 15, 25, 65:
Severe defects: 4.0, 6.5, 15
4.5.5.3 Qualification criteria
According to the inspection results, if the number of defects found does not reach the qualified number, the batch of C group inspection is judged to be qualified: otherwise, the batch of C group inspection is judged to be unqualified.
4.5.5.4 Re-inspection
If the sample C group inspection is unqualified, the acceptance and delivery of the product should be stopped, and the contractor should notify the appraisal agency of the unqualified situation. After finding out the cause and taking corrective measures, it can be submitted for inspection again. When re-inspecting, stricter standards should be adopted. If the re-inspection is qualified, the C group inspection is judged to be qualified; if the re-inspection is still unqualified, the unqualified situation should be notified to the superior appraisal agency.
4.5.5.5 Sample handling
Samples that have been inspected by Group C cannot be delivered as part of the inspection or by request. 4,5.5.6 Inspection cycle
The inspection cycle of Group C is specified by the product specification and shall not be less than once every 12 months. When there are major changes in the structure, materials, and processes of the equipment, which may affect the performance of the equipment and when there are major complaints from users, Group C inspections should also be carried out.
4.5.6 Group D inspection
Group D inspections should be carried out on products that have passed the inspections of Group A and Group B. 4.5.6.1 Inspection items
The inspection items of Group D are shown in Table 3.
4.5.6.2 Sampling plan
Samples for Group D inspections should be randomly selected from the samples of the inspections of Group A and Group B, and the number of samples shall be specified by the product specification.
4. 5. 6. 3 Failure
If the sample fails to pass the D group inspection, the acceptance and delivery of the product shall be stopped. The contractor shall notify the superior appraisal agency of the failure. After taking corrective measures, all tests or inspections shall be carried out again according to the superior appraisal agency's opinion, or only the unqualified items shall be tested or inspected. If the test is still unqualified, the superior appraisal agency shall be notified of the failure.
4.5.6.4 Sample processing
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Unless otherwise specified, the contractor shall be responsible for repairing and replacing parts that have consumed all or part of the design service life of the samples that have passed the D group inspection, and after passing the A and B group inspections again, they can be delivered according to the contract or order. The delivery rules shall be carried out in accordance with Article 5.1 of GJB367.4. 4.5.6.5 Inspection period
The inspection period is 12 months, but when there are major changes in the main design, process, components and raw materials of the equipment, which have a significant impact on the performance of the equipment, a group D inspection should also be carried out. 4.6 Packaging inspection
It shall be carried out in accordance with the provisions of Chapter 6 of GJB367.5. 4.7 Inspection method
4.7.1 General
The test and measurement methods specified in this specification shall be carried out under the test conditions specified in Article 2.1.1 of GJB367.2. The power supply used in the test and test methods specified in this specification shall meet the following conditions: AC power supply: 220-44V, 501.0Hz4.7.2 General inspection
For 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10, etc., it shall be inspected in accordance with the product specifications to determine whether the structural dimensions, physical characteristics, markings and manufacturing processes meet the corresponding design requirements. 4.7.3 Safety
8. After the communication machine is subjected to the power supply polarity reverse connection, overvoltage and overcurrent protection tests, check whether the communication machine works normally:
The external connector of the communication machine is subjected to reverse and wrong insertion tests to check whether the equipment is damaged: b.
The lightning test of the communication machine shall be carried out in accordance with the provisions of the product specification: G
d. When the communication machine is in normal working state, the grounding resistance of the external accessible part to the ground shall be less than 52: e. Personal safety shall be inspected and tested in accordance with the provisions of the product specification. 4.7.4 Maintainability
Maintainability test shall be carried out in accordance with the relevant provisions of GJB2072. 4.7.5 Interchangeability
After replacement with parts, components or spare parts with the same function, the interchangeable parts shall not be adjusted, and the photoelectric performance shall be tested to meet the requirements of the specification.
4.7.6 Test method for performance characteristics
4.7.6.1 Test preparation
4.7.6.1.1 Preparation of the equipment under test
The equipment should be in good condition before testing. a. The electrical contact connectors are connected correctly: b. Various alarm devices are intact, normal and correct. 4.7.6.1.2 Preparation of test instruments
The accuracy of the test instruments should meet the accuracy requirements of the measured performance indicators and be within the period of metrological verification. The test system should be able to provide the conditions required for the test. During the test, the instruments in the test system should maintain the specified accuracy.
4.7.6.2 Test of optical receiving sensitivity
SJ 20772—2000
Test of optical receiving sensitivity is shown in Figure 2: Light source
Test steps are as follows:
Light transmission
Code generator
Light receiving
Figure 2 Test of optical receiving sensitivity
Error detector
Self. If there is no special provision, the digital signal is a pseudo-random code series with a duty cycle of 50%, and the code generator is adjusted to output the pseudo-random code sequence of the corresponding interface code: b. Adjust the input of the optical transmitter until the bit error rate reaches the specified value. The minimum receiver optical power value at P measured by an optical power meter is the sensitivity of the optical receiver at the bit error rate, in decibel milliwatts. 4.7.6.3 Bit Error Rate Test
The bit error rate of the transmission system composed of the communication machine adopts the following test method. The test system is constructed as shown in Figure 3, and the test steps are as follows: Transmitting antenna
Generator
Light transmission
Receiving antenna
Light reception
Tested transmission system
Figure 3 Bit Error Rate Test Diagram
Tester
a. Send the 2zn-1 pseudo-random bit sequence (PRBS) signal emitted by the code generator to the group entrance of the optical transmission, and the bit error is detected by the bit error detector at the receiving end. n is a selected positive integer: b. During the measurement, the bit error detector is placed in the counting position, the number of bit errors within 241 is observed, and the error time, bit error rate and the start and end time of the bit error test are automatically printed. 4.7.6.4 Test of light source optical power
The test block diagram of light source optical power is shown in Figure 4: 10
iKAoNrKAca5 Group C inspection
Group C inspection shall be conducted on the products of the qualified batches of Group A and Group B inspection. 4.5.5.1 Inspection items
The inspection items of Group C are shown in Table 3.
4.5.5.2 Sampling plan
The sampling plan shall be carried out in accordance with the provisions of GJB179A. The sampling plan of the special level S-1 is adopted, and the defect classification is specified by the product specification. The acceptable quality level (AQL) is selected from the following data: Minor defects: 15, 25, 65:
Serious defects: 4.0, 6.5, 15
4.5.5.3 Qualification criteria
According to the inspection results, if the number of defects found does not reach the qualified judgment number, the batch of Group C inspection is judged to be qualified: otherwise, the batch of Group C inspection is judged to be unqualified.
4.5.5.4 Re-inspection
If the sample fails the Group C inspection, the acceptance and delivery of the product shall be stopped, and the contractor shall notify the appraisal agency of the non-conformity. After the cause is found out and corrective measures are taken, the product can be re-submitted for inspection. During the re-inspection, stricter inspection shall be adopted. If the re-inspection is qualified, the Group C inspection is judged to be qualified; if the re-inspection is still unqualified, the unqualified situation shall be notified to the superior appraisal agency.
4.5.5.5 Sample processing
Samples that have passed the Group C inspection cannot be delivered according to the order. 4.5.5.6 Inspection cycle
The Group C inspection cycle is specified by the product specification and shall not be less than one time every 12 months. When there are major changes in the structure, materials, processes, etc. of the equipment, which may affect the performance of the equipment and there are major complaints from users, Group C inspection should also be carried out.
4.5.6 Group D Inspection
Group D inspection shall be conducted on products that have passed the Group A and Group B inspections. 4.5.6.1 Inspection Items
Group D inspection items are shown in Table 3.
4.5.6.2 Sampling Plan
Group D inspection samples shall be randomly selected from the samples that have passed the Group A and Group B inspections. The number of samples shall be specified by the product specifications.
4. 5. 6. 3 Unqualified
If the sample fails the Group D inspection, the acceptance and delivery of the product shall be stopped. The contractor shall notify the superior appraisal agency of the unqualified situation. After taking corrective measures, all tests or inspections shall be carried out again according to the superior appraisal agency's opinion, or only the unqualified items shall be tested or inspected. If the test is still unqualified, the unqualified situation shall be notified to the superior appraisal agency.
4.5.6.4 Sample processing
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Unless otherwise specified, the sample contractor who has passed the D group inspection shall be responsible for repairing and replacing the parts that have consumed all or part of the design service life, and after passing the A and B group inspections again, they can be delivered according to the contract or order. The delivery rules shall be carried out in accordance with Article 5.1 of GJB367.4. 4.5.6.5 Inspection period
The D group inspection period is 12 months, but when there are major changes in the main design, process, components and raw materials of the equipment that have a major impact on the performance of the equipment, the D group inspection shall also be carried out. 4.6 Packaging inspection
It shall be carried out in accordance with the provisions of Chapter 6 of GJB367.5. 4.7 Inspection methods
4.7.1 General
The tests and measurement methods specified in this specification shall be carried out under the test conditions specified in Article 2.1.1 of GJB367.2. The power supply used in the tests and test methods specified in this specification shall meet the following conditions: AC power supply: 220-44V, 501.0Hz4.7.2 General inspection
Articles 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10 shall be inspected in accordance with the product specifications to determine whether the structural dimensions, physical properties, markings and manufacturing processes meet the corresponding design requirements. 4.7.3 Safety
8. After the communication machine is subjected to the power supply polarity reverse connection, overvoltage and overcurrent protection tests, check whether the communication machine works normally:
The external connector of the communication machine is subjected to reverse and wrong insertion tests to check whether the equipment is damaged: b.
The lightning test of the communication machine shall be carried out in accordance with the provisions of the product specification: G
d. When the communication machine is in normal working state, the grounding resistance of the external accessible part to the ground shall be less than 52: e. Personal safety shall be inspected and tested in accordance with the provisions of the product specification. 4.7.4 Maintainability
Maintainability test shall be carried out in accordance with the relevant provisions of GJB2072. 4.7.5 Interchangeability
After replacement with parts, components or spare parts with the same function, the interchangeable parts shall not be adjusted, and the photoelectric performance shall be tested to meet the requirements of the specification.
4.7.6 Test method for performance characteristics
4.7.6.1 Test preparation
4.7.6.1.1 Preparation of the equipment under test
The equipment should be in good condition before testing. a. The electrical contact connectors are connected correctly: b. Various alarm devices are intact, normal and correct. 4.7.6.1.2 Preparation of test instruments
The accuracy of the test instruments should meet the accuracy requirements of the measured performance indicators and be within the period of metrological verification. The test system should be able to provide the conditions required for the test. During the test, the instruments in the test system should maintain the specified accuracy.
4.7.6.2 Test of optical receiving sensitivity
SJ 20772—2000
Test of optical receiving sensitivity is shown in Figure 2: Light source
Test steps are as follows:
Light transmission
Code generator
Light receiving
Figure 2 Test of optical receiving sensitivity
Error detector
Self. If there is no special provision, the digital signal is a pseudo-random code series with a duty cycle of 50%, and the code generator is adjusted to output the pseudo-random code sequence of the corresponding interface code: b. Adjust the input of the optical transmitter until the bit error rate reaches the specified value. The minimum receiver optical power value at P measured by an optical power meter is the sensitivity of the optical receiver at the bit error rate, in decibel milliwatts. 4.7.6.3 Bit Error Rate Test
The bit error rate of the transmission system composed of the communication machine adopts the following test method. The test system is constructed as shown in Figure 3, and the test steps are as follows: Transmitting antenna
Generator
Light transmission
Receiving antenna
Light reception
Tested transmission system
Figure 3 Bit Error Rate Test Diagram
Tester
a. Send the 2zn-1 pseudo-random bit sequence (PRBS) signal emitted by the code generator to the group entrance of the optical transmission, and the bit error is detected by the bit error detector at the receiving end. n is a selected positive integer: b. During the measurement, the bit error detector is placed in the counting position, the number of bit errors within 241 is observed, and the error time, bit error rate and the start and end time of the bit error test are automatically printed. 4.7.6.4 Test of light source optical power
The test block diagram of light source optical power is shown in Figure 4: 10
iKAoNrKAca5 Group C inspection
Group C inspection shall be conducted on the products of the qualified batches of Group A and Group B inspection. 4.5.5.1 Inspection items
The inspection items of Group C are shown in Table 3.
4.5.5.2 Sampling plan
The sampling plan shall be carried out in accordance with the provisions of GJB179A. The sampling plan of the special level S-1 is adopted, and the defect classification is specified by the product specification. The acceptable quality level (AQL) is selected from the following data: Minor defects: 15, 25, 65:
Serious defects: 4.0, 6.5, 15
4.5.5.3 Qualification criteria
According to the inspection results, if the number of defects found does not reach the qualified judgment number, the batch of Group C inspection is judged to be qualified: otherwise, the batch of Group C inspection is judged to be unqualified.
4.5.5.4 Re-inspection
If the sample fails the Group C inspection, the acceptance and delivery of the product shall be stopped, and the contractor shall notify the appraisal agency of the non-conformity. After the cause is found out and corrective measures are taken, the product can be re-submitted for inspection. During the re-inspection, stricter inspection shall be adopted. If the re-inspection is qualified, the Group C inspection is judged to be qualified; if the re-inspection is still unqualified, the unqualified situation shall be notified to the superior appraisal agency.
4.5.5.5 Sample processing
Samples that have passed the Group C inspection cannot be delivered according to the order. 4.5.5.6 Inspection cycle
The Group C inspection cycle is specified by the product specification and shall not be less than one time every 12 months. When there are major changes in the structure, materials, processes, etc. of the equipment, which may affect the performance of the equipment and there are major complaints from users, Group C inspection should also be carried out.
4.5.6 Group D Inspection
Group D inspection shall be conducted on products that have passed the Group A and Group B inspections. 4.5.6.1 Inspection Items
Group D inspection items are shown in Table 3.
4.5.6.2 Sampling Plan
Group D inspection samples shall be randomly selected from the samples that have passed the Group A and Group B inspections. The number of samples shall be specified by the product specifications.
4. 5. 6. 3 Unqualified
If the sample fails the Group D inspection, the acceptance and delivery of the product shall be stopped. The contractor shall notify the superior appraisal agency of the unqualified situation. After taking corrective measures, all tests or inspections shall be carried out again according to the superior appraisal agency's opinion, or only the unqualified items shall be tested or inspected. If the test is still unqualified, the unqualified situation shall be notified to the superior appraisal agency.
4.5.6.4 Sample processing
TKANiKAca-
SJ20772—2000
Unless otherwise specified, the sample contractor who has passed the D group inspection shall be responsible for repairing and replacing the parts that have consumed all or part of the design service life, and after passing the A and B group inspections again, they can be delivered according to the contract or order. The delivery rules shall be carried out in accordance with Article 5.1 of GJB367.4. 4.5.6.5 Inspection period
The D group inspection period is 12 months, but when there are major changes in the main design, process, components and raw materials of the equipment that have a major impact on the performance of the equipment, the D group inspection shall also be carried out. 4.6 Packaging inspection
It shall be carried out in accordance with the provisions of Chapter 6 of GJB367.5. 4.7 Inspection methods
4.7.1 General
The tests and measurement methods specified in this specification shall be carried out under the test conditions specified in Article 2.1.1 of GJB367.2. The power supply used in the tests and test methods specified in this specification shall meet the following conditions: AC power supply: 220-44V, 501.0Hz4.7.2 General inspection
Articles 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10 shall be inspected in accordance with the product specifications to determine whether the structural dimensions, physical properties, markings and manufacturing processes meet the corresponding design requirements. 4.7.3 Safety
8. After the communication machine is subjected to the power supply polarity reverse connection, overvoltage and overcurrent protection tests, check whether the communication machine works normally:
The external connector of the communication machine is subjected to reverse and wrong insertion tests to check whether the equipment is damaged: b.
The lightning test of the communication machine shall be carried out in accordance with the provisions of the product specification: G
d. When the communication machine is in normal working state, the grounding resistance of the external accessible part to the ground shall be less than 52: e. Personal safety shall be inspected and tested in accordance with the provisions of the product specification. 4.7.4 Maintainability
Maintainability test shall be carried out in accordance with the relevant provisions of GJB2072. 4.7.5 Interchangeability
After replacement with parts, components or spare parts with the same function, the interchangeable parts shall not be adjusted, and the photoelectric performance shall be tested to meet the requirements of the specification.
4.7.6 Test method for performance characteristics
4.7.6.1 Test preparation
4.7.6.1.1 Preparation of the equipment under test
The equipment should be in good condition before testing. a. The electrical contact connectors are connected correctly: b. Various alarm devices are intact, normal and correct. 4.7.6.1.2 Preparation of test instruments
The accuracy of the test instruments should meet the accuracy requirements of the measured performance indicators and be within the period of metrological verification. The test system should be able to provide the conditions required for the test. During the test, the instruments in the test system should maintain the specified accuracy.
4.7.6.2 Test of optical receiving sensitivity
SJ 20772—2000
Test of optical receiving sensitivity is shown in Figure 2: Light source
Test steps are as follows:
Light transmission
Code generator
Light receiving
Figure 2 Test of optical receiving sensitivity
Error detector
Self. If there is no special provision, the digital signal is a pseudo-random code series with a duty cycle of 50%, and the code generator is adjusted to output the pseudo-random code sequence of the corresponding interface code: b. Adjust the input of the optical transmitter until the bit error rate reaches the specified value. The minimum receiver optical power value at P measured by an optical power meter is the sensitivity of the optical receiver at the bit error rate, in decibel milliwatts. 4.7.6.3 Bit Error Rate Test
The bit error rate of the transmission system composed of the communication machine adopts the following test method. The test system is constructed as shown in Figure 3, and the test steps are as follows: Transmitting antenna
Generator
Light transmission
Receiving antenna
Light reception
Tested transmission system
Figure 3 Bit Error Rate Test Diagram
Tester
a. Send the 2zn-1 pseudo-random bit sequence (PRBS) signal emitted by the code generator to the group entrance of the optical transmission, and the bit error is detected by the bit error detector at the receiving end. n is a selected positive integer: b. During the measurement, the bit error detector is placed in the counting position, the number of bit errors within 241 is observed, and the error time, bit error rate and the start and end time of the bit error test are automatically printed. 4.7.6.4 Test of light source optical power
The test block diagram of light source optical power is shown in Figure 4: 10
iKAoNrKAca5.6.2 Sampling plan
The samples for group D inspection shall be randomly selected from the samples of the qualified batches of group A inspection and group B inspection, and the number of samples shall be specified by the product specification.
4. 5. 6. 3 Unqualified
If the sample fails the group D inspection, the acceptance and delivery of the product shall be stopped. The contractor shall notify the superior appraisal agency of the unqualified situation. After taking corrective measures, all tests or inspections shall be carried out again according to the opinion of the superior appraisal agency, or only the unqualified items shall be tested or inspected. If the test is still unqualified, the unqualified situation shall be notified to the superior appraisal agency.
4.5.6.4 Sample processing
TKANiKAca-
SJ20772—2000
Unless otherwise specified, the sample contractor who has passed the D group inspection shall be responsible for repairing and replacing the parts that have consumed all or part of the design service life, and after passing the A and B group inspections again, they can be delivered according to the contract or order. The delivery rules shall be carried out in accordance with Article 5.1 of GJB367.4. 4.5.6.5 Inspection period
The D group inspection period is 12 months, but when there are major changes in the main design, process, components and raw materials of the equipment that have a major impact on the performance of the equipment, the D group inspection shall also be carried out. 4.6 Packaging inspection
It shall be carried out in accordance with the provisions of Chapter 6 of GJB367.5. 4.7 Inspection methods
4.7.1 General
The tests and measurement methods specified in this specification shall be carried out under the test conditions specified in Article 2.1.1 of GJB367.2. The power supply used in the tests and test methods specified in this specification shall meet the following conditions: AC power supply: 220-44V, 501.0Hz4.7.2 General inspection
Articles 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10 shall be inspected in accordance with the product specifications to determine whether the structural dimensions, physical properties, markings and manufacturing processes meet the corresponding design requirements. 4.7.3 Safety
8. After the communication machine is subjected to the power supply polarity reverse connection, overvoltage and overcurrent protection tests, check whether the communication machine works normally:
The external connector of the communication machine is subjected to reverse and wrong insertion tests to check whether the equipment is damaged: b.
The lightning test of the communication machine shall be carried out in accordance with the provisions of the product specification: G
d. When the communication machine is in normal working state, the grounding resistance of the external accessible part to the ground shall be less than 52: e. Personal safety shall be inspected and tested in accordance with the provisions of the product specification. 4.7.4 Maintainability
Maintainability test shall be carried out in accordance with the relevant provisions of GJB2072. 4.7.5 Interchangeability
After replacement with parts, components or spare parts with the same function, the interchangeable parts shall not be adjusted, and the photoelectric performance shall be tested to meet the requirements of the specification.
4.7.6 Test method for performance characteristics
4.7.6.1 Test preparation
4.7.6.1.1 Preparation of the equipment under test
The equipment should be in good condition before testing. a. The electrical contact connectors are connected correctly: b. Various alarm devices are intact, normal and correct. 4.7.6.1.2 Preparation of test instruments
The accuracy of the test instruments should meet the accuracy requirements of the measured performance indicators and be within the period of metrological verification. The test system should be able to provide the conditions required for the test. During the test, the instruments in the test system should maintain the specified accuracy.
4.7.6.2 Test of optical receiving sensitivity
SJ 20772—2000
Test of optical receiving sensitivity is shown in Figure 2: Light source
Test steps are as follows:
Light transmission
Code generator
Light receiving
Figure 2 Test of optical receiving sensitivity
Error detector
Self. If there is no special provision, the digital signal is a pseudo-random code series with a duty cycle of 50%, and the code generator is adjusted to output the pseudo-random code sequence of the corresponding interface code: b. Adjust the input of the optical transmitter until the bit error rate reaches the specified value. The minimum receiver optical power value at P measured by an optical power meter is the sensitivity of the optical receiver at the bit error rate, in decibel milliwatts. 4.7.6.3 Bit Error Rate Test
The bit error rate of the transmission system composed of the communication machine adopts the following test method. The test system is constructed as shown in Figure 3, and the test steps are as follows: Transmitting antenna
Generator
Light transmission
Receiving antenna
Light reception
Tested transmission system
Figure 3 Bit Error Rate Test Diagram
Tester
a. Send the 2zn-1 pseudo-random bit sequence (PRBS) signal emitted by the code generator to the group entrance of the optical transmission, and the bit error is detected by the bit error detector at the receiving end. n is a selected positive integer: b. During the measurement, the bit error detector is placed in the counting position, the number of bit errors within 241 is observed, and the error time, bit error rate and the start and end time of the bit error test are automatically printed. 4.7.6.4 Test of light source optical power
The test block diagram of light source optical power is shown in Figure 4: 10
iKAoNrKAca5.6.2 Sampling plan
The samples for group D inspection shall be randomly selected from the samples of the qualified batches of group A inspection and group B inspection, and the number of samples shall be specified by the product specification.
4. 5. 6. 3 Unqualified
If the sample fails the group D inspection, the acceptance and delivery of the product shall be stopped. The contractor shall notify the superior appraisal agency of the unqualified situation. After taking corrective measures, all tests or inspections shall be carried out again according to the opinion of the superior appraisal agency, or only the unqualified items shall be tested or inspected. If the test is still unqualified, the unqualified situation shall be notified to the superior appraisal agency.
4.5.6.4 Sample processing
TKANiKAca-
SJ20772—2000
Unless otherwise specified, the sample contractor who has passed the D group inspection shall be responsible for repairing and replacing the parts that have consumed all or part of the design service life, and after passing the A and B group inspections again, they can be delivered according to the contract or order. The delivery rules shall be carried out in accordance with Article 5.1 of GJB367.4. 4.5.6.5 Inspection period
The D group inspection period is 12 months, but when there are major changes in the main design, process, components and raw materials of the equipment that have a major impact on the performance of the equipment, the D group inspection shall also be carried out. 4.6 Packaging inspection
It shall be carried out in accordance with the provisions of Chapter 6 of GJB367.5. 4.7 Inspection methods
4.7.1 General
The tests and measurement methods specified in this specification shall be carried out under the test conditions specified in Article 2.1.1 of GJB367.2. The power supply used in the tests and test methods specified in this specification shall meet the following conditions: AC power supply: 220-44V, 501.0Hz4.7.2 General inspection
Articles 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10 shall be inspected in accordance with the product specifications to determine whether the structural dimensions, physical properties, markings and manufacturing processes meet the corresponding design requirements. 4.7.3 Safety
8. After the communication machine is subjected to the power supply polarity reverse connection, overvoltage and overcurrent protection tests, check whether the communication machine works normally:
The external connector of the communication machine is subjected to reverse and wrong insertion tests to check whether the equipment is damaged: b.
The lightning test of the communication machine shall be carried out in accordance with the provisions of the product specification: G
d. When the communication machine is in normal working state, the grounding resistance of the external accessible part to the ground shall be less than 52: e. Personal safety shall be inspected and tested in accordance with the provisions of the product specification. 4.7.4 Maintainability
Maintainability test shall be carried out in accordance with the relevant provisions of GJB2072. 4.7.5 Interchangeability
After replacement with parts, components or spare parts with the same function, the interchangeable parts shall not be adjusted, and the photoelectric performance shall be tested to meet the requirements of the specification.
4.7.6 Test method for performance characteristics
4.7.6.1 Test preparation
4.7.6.1.1 Preparation of the equipment under test
The equipment should be in good condition before testing. a. The electrical contact connectors are connected correctly: b. Various alarm devices are intact, normal and correct. 4.7.6.1.2 Preparation of test instruments
The accuracy of the test instruments should meet the accuracy requirements of the measured performance indicators and be within the period of metrological verification. The test system should be able to provide the conditions required for the test. During the test, the instruments in the test system should maintain the specified accuracy.
4.7.6.2 Test of optical receiving sensitivity
SJ 20772—2000
Test of optical receiving sensitivity is shown in Figure 2: Light source
Test steps are as follows:
Light transmission
Code generator
Light receiving
Figure 2 Test of optical receiving sensitivity
Error detector
Self. If there is no special provision, the digital signal is a pseudo-random code series with a duty cycle of 50%, and the code generator is adjusted to output the pseudo-random code sequence of the corresponding interface code: b. Adjust the input of the optical transmitter until the bit error rate reaches the specified value. The minimum receiver optical power value at P measured by an optical power meter is the sensitivity of the optical receiver at the bit error rate, in decibel milliwatts. 4.7.6.3 Bit Error Rate Test
The bit error rate of the transmission system composed of the communication machine adopts the following test method. The test system is constructed as shown in Figure 3, and the test steps are as follows: Transmitting antenna
Generator
Light transmission
Receiving antenna
Light reception
Tested transmission system
Figure 3 Bit Error Rate Test Diagram
Tester
a. Send the 2zn-1 pseudo-random bit sequence (PRBS) signal emitted by the code generator to the group entrance of the optical transmission, and the bit error is detected by the bit error detector at the receiving end. n is a selected positive integer: b. During the measurement, the bit error detector is placed in the counting position, the number of bit errors within 241 is observed, and the error time, bit error rate and the start and end time of the bit error test are automatically printed. 4.7.6.4 Test of light source optical power
The test block diagram of light source optical power is shown in Figure 4: 10
iKAoNrKAca2 Test of optical receiving sensitivity
SJ 20772—2000
Test of optical receiving sensitivity is shown in Figure 2: Light source
Test steps are as follows:
Light transmission
Code generator
Light receiving
Figure 2 Test of optical receiving sensitivity
Error detector
Self. If there is no special provision, the digital signal is measured with a pseudo-random code series with a duty cycle of 50%, and the code generator is adjusted to output the pseudo-random code sequence of the corresponding interface code: b. Adjust the input of the optical transmitter until the bit error rate reaches the specified value. The minimum receiver optical power value at P measured by an optical power meter is the sensitivity of the optical receiver at the bit error rate, in decibel milliwatts. 4.7.6.3 Test of bit error rate
The bit error rate of the transmission system composed of communication machines is tested by the following test method. The test system is constructed as shown in Figure 3, and the test steps are as follows: Transmitting antenna
Generator
Light transmission
Receiving antenna
Light reception
Tested transmission system
Figure 3 Bit error rate test diagram
Tester
a. Send the 2zn-1 pseudo-random bit sequence (PRBS) signal emitted by the code generator to the optical transmission group entrance, and the error is detected by the error detector at the receiving end. n is a selected positive integer: b. During measurement, the error detector is placed in the counting position, the number of bit errors within 241 is observed, and the error time, bit error rate and the start and end time of the error test are automatically printed. 4.7.6.4 Test of light source optical power
The test block diagram of light source optical power is shown in Figure 4: 10
iKAoNrKAca2 Test of optical receiving sensitivity
SJ 20772—2000
Test of optical receiving sensitivity is shown in Figure 2: Light source
Test steps are as follows:
Light transmission
Code generator
Light receiving
Figure 2 Test of optical receiving sensitivity
Error detector
Self. If there is no special provision, the digital signal is measured with a pseudo-random code series with a duty cycle of 50%, and the code generator is adjusted to output the pseudo-random code sequence of the corresponding interface code: b. Adjust the input of the optical transmitter until the bit error rate reaches the specified value. The minimum receiver optical power value at P measured by an optical power meter is the sensitivity of the optical receiver at the bit error rate, in decibel milliwatts. 4.7.6.3 Test of bit error rate
The bit error rate of the transmission system composed of communication machines is tested by the following test method. The test system is constructed as shown in Figure 3, and the test steps are as follows: Transmitting antenna
Generator
Light transmission
Receiving antenna
Light reception
Tested transmission system
Figure 3 Bit error rate test diagram
Tester
a. Send the 2zn-1 pseudo-random bit sequence (PRBS) signal emitted by the code generator to the optical transmission group entrance, and the error is detected by the error detector at the receiving end. n is a selected positive integer: b. During measurement, the error detector is placed in the counting position, the number of bit errors within 241 is observed, and the error time, bit error rate and the start and end time of the error test are automatically printed. 4.7.6.4 Test of light source optical power
The test block diagram of light source optical power is shown in Figure 4: 10
iKAoNrKAca
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