Some standard content:
Military Standard for Electronic Industry of the People's Republic of China FL6625
SJ20585-96
General specification for
microwave frequency counter
Published on August 30, 1996
Implemented on January 1, 1997
Approved by the Ministry of Electronics Industry of the People's Republic of China Military Standard for Electronic Industry of the People's Republic of China General specification for
microwave frequency counter
1 Scope
1.1 Subject Content
This specification specifies the requirements, quality assurance provisions and delivery preparation for military microwave frequency counters. 1.2 Scope of Application
This specification applies to military microwave frequency counters (hereinafter referred to as instruments). 2 Referenced Documents GR 3047.6—86 GB6592—86 Basic Dimensions of Desktop Cases for Electronic Equipment General Provisions for Errors of Measuring Instruments CB/T15151:1-94 General Technical Requirements for Frequency Counters GB/T15151.2—94 Test Methods for Frequency Counters SI 2259-82 SI 20369—93 SJ 20370--93 SJ 20371—93 SJ 20372—93 SJ20373—93 SJ20374—93 ST 20375—93 SJ 20376-93
SJ 20377—93
3 Requirements
3.1 Qualification
Compilation of random technical documents for electronic measuring instruments General specifications for military electronic test equipment SJ 2058596
Basic requirements for design and structure
General specifications for military electronic test equipment
General specifications for automotive electronic test equipment
Power supply requirements and test methods
General specifications for military electronic test equipment
Environmental requirements and test methods
Safety requirements
General specifications for military electrical test equipment
Electromagnetic compatibility requirements and test methods
Military electronic test equipment General Specifications
Requirements and Methods for Reliability Test
General Specifications for Military Electronic Test Equipment
Requirements for Identification, Marking and Packaging
General Specifications for Military Electronic Test Equipment
General Specifications for Military Electronic Test Equipment
Quality Assurance Provisions
The instruments submitted in accordance with this specification shall be qualified products or approved products.3.2 Design and Structure
3.2.1 According to 1.4 of SI20369. The instrument is Type II equipment: Unless otherwise specified in the detailed specifications, the instrument use environment level shall be Level 6. The instrument chassis can be B-type or F-type chassis. The color of the chassis shall be specified in the detailed specifications, or in accordance with the color specified by the Ministry of Electronics Industry of the People's Republic of China on August 30, 1996 and implemented on January 1, 1997
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The purchaser (in the contract).
SJ20585-96
3.2.2 The size of the instrument chassis shall comply with the basic chassis size series specified in GB3047.5. The requirements for B-type or F-type chassis shall comply with the requirements of Appendix A of SJ 20370. 3.2.3 The design of the instrument structure shall comply with the requirements of Chapter 4 and Chapter 5 of SJ20370, using printed circuit technology, large-scale integrated components and microcircuit technology. 3.2.4 The instrument shall be designed for electromagnetic compatibility and meet the requirements of Article 5.3.2 of S20374. 3.2.5 The instrument shall be designed for ergonomics and meet the requirements of Article 5.1.4.1 of ST 20370. 3.2.6 The mechanical design of the instrument shall include thermal design and meet the requirements of Article 5.1.5.1 of SI20370. 3.2.7 The fastener design of the instrument shall ensure the tight installation of parts, components and components, in accordance with the requirements of 5.1.5.7 of S20370.
3.2.8 The electrical design of the instrument shall be equipped with internal test and correction functions, self-test (self-check) and self-diagnosis functions, in accordance with the requirements of 5.1.5.9 of SI20370.
3.2.9 The electrical design of the instrument shall have a protection device with a maximum burnout input level, and protection devices such as fuses or circuit breakers shall be installed, and grounding design, positive and negative resistance matching design and safety design shall be carried out, in accordance with the requirements of 5.1.6 of SI20370. 3.2.10 The optional interface functions of the instrument include RS-232 interface or (and) IEEE-488 interface function, in accordance with the requirements of 5.4 of SI20370.
3.2.11 Appearance and assembly requirements: The instrument structure should be complete: the instrument surface should have no obvious mechanical damage and coating damage, the instrument logo, symbols and text should be clear and correct; the instrument control and operating components should be installed correctly and firmly, and the operation should be flexible and reliable. 3.3 Overall dimensions
The instrument overall dimensions should be specified in the detailed specifications: i (mm) × hmm) x (mm) (specific value) 3.4 Weight and mechanical stability
The instrument weight should be specified in the detailed specifications. (Specific value) kg. When the instrument only has a main unit, an insertion unit, and an attached network device, the weight values should be given separately.
The mechanical stability of the instrument should meet the requirements of Article 5.6.4 of SJ20370. 3.5 Marking
Should comply with the marking requirements of 5.1.3 of SI 20376 for Type 1 test equipment a: Model and name of the instrument:
b, Environmental level of the instrument:
c Input power, voltage (full load current, frequency and position requirements when necessary); d, Name of the contractor, trademark, year, month, port and serial number of the manufacturer; Warning signs, panel markings and signboards of the instrument shall comply with the provisions of 5.1.3 of SJ20376. 3.6 Power supply
The maximum power consumption of the instrument shall be specified in the detailed specification: The external power supply of the instrument shall be AC 50Hz, single-phase 220V. The allowable range of input voltage variation shall be ±10% of the rated value, the allowable range of frequency variation shall be ±5% of the rated value, and the waveform characteristics shall have no effect on the performance of the instrument under the condition that they comply with 5.1.2.1.3 of SI20371. Unless otherwise specified in the detailed specifications, the transient conditions of the instrument AC power supply and the interruption of the power supply shall comply with the requirements of 5.3.2.2 and 5.3.2.3 of ST20371. 3.7 Safety requirements of the equipment shall comply with the requirements of 5.2 of ST20373. 3.7.1 The anti-shock of the instrument shall comply with the provisions of 5.3.1.1 and 5.3.1.2 of SI20373. 3.7.2 Open circuit voltage and current
During the instrument working time, the open circuit voltage between any accessible part of the instrument and the ground or other accessible parts is: AC effective value: 30V (peak value 42.4V);
DC:
60V.
When the measured open circuit voltage value exceeds the above specified value, the leakage current measurement should be carried out, and the leakage current value should not exceed 3.5mA. 3.7.3 Radiation
Should meet the requirements of 5.1.3.2 in SI20373. 3.7.4 Noise and ultrasonic pressure
Should meet the requirements of 5.1.3.5 in SI20373. 3.8 Reliability
Should meet the reliability requirements of Type II test equipment in Chapter 4 and Chapter 5 of SI20375, and the reliability index is MTBF (m) 22000h.
3.9 Electromagnetic compatibility
Should meet the requirements of Type II test equipment in Article 5.3.2 of SJ20374, and the specific items shall be specified in the detailed specifications. 3.10 Maintainability
Should be derived from the maintainability requirements and accessibility requirements in Article 5.7 of SI20370, and the specific items shall be specified in the detailed specifications. 3.11 Environmental adaptability
3.11.1Should meet the requirements of environmental level 6 for Type II instruments using B or F type chassis in SI20372 (see Table 1)
3.11.2 Tests such as mold, salt spray, explosive atmosphere, sand and dust, and sunlight radiation in adaptability to special environmental conditions shall be specified in the detailed specifications according to the requirements of Articles 5.6.5.7, 5.8, 5.9, and 5.10 of 520372 according to the needs of the ordering party. 3.12 Random documents
Should comply with the requirements of SI2259, including instruction manual, packing list, and if necessary, resume, revision table and curve chart, revision manual, instruction/program card.
3.13 Packaging
Should comply with the packaging requirements of Article 5.2 of SI20376. 3.14 Preheating time
Should comply with Article 4.1 of SI 20372, which is 20min Table 1
Temperature/humidity
! Non-standard,
(- 40 ~70)t
Working:
(10~ 30]t: 95% 1 5%RH
(31 ~40)C 75% =5% RH
95%±5%RH, the limit above 30℃ is 75%±5%RH Storage: -40℃
Storage: 70℃
Working: 10℃
Working; 40℃
SJ20372
Chapter No.
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Temperature shock
Low pressure
Positive vibration
Random vibration
To tighten cargo bounce
Mechanical attack
SJ20585-96
Continued Table 1
According to the working limit temperature specified in this table Non-working: 57kPa (4570m);
Working: 70kPa 3050m)
Frequency: 5~55Hz1
Acceleration: (0.16-19.96)m/s2
To be determined according to the needs of the ordering party
To be determined according to the needs of the ordering party
1According to the functional impact, tilt jump, transportation drop and strong impact requirements in Article 5.4 of S120372; the dripping rain requirements of the B-type chassis in Table 9 in Article 5.5 of SJ 20372
Chapter number of SJ20372
When the power supply of the crystal oscillator is separated from the power supply of the main unit, the warm-up time of the crystal oscillator of the instrument shall be separately specified in the detailed specification, and the ability to work for a long time shall be guaranteed. 3.15 Performance characteristics
3.15.1 Frequency measurement range
The frequency measurement range shall be specified in the detailed specification. The instrument may have multiple input channels, named Channel I and Channel II respectively. The frequency range can be expressed in segments.
Input I: 10~1500MHz;
Input IⅡ: 520MHz~-40GHz.
3.15.2 Sensitivity
Should be expressed in the detailed specification as a sine wave input level value according to formula (1): #×0.(1mV(effective value)
Where: n is 1~10000 integer.
It is allowed to be expressed in frequency bands. For frequency bands above 1 GHz, the corresponding sensitivity milliwatt decibel value (dF3m) must be indicated. 3.15.3 The maximum input
shall be expressed in the detailed specification according to formula (2):
where " is an integer from 1 to 100; or converted into milliwatt decibel value, 3.15.4 Maximum non-burning power
The maximum non-burning power value or average value shall be specified in the detailed specification, expressed in milliwatts (mW) or in milliwatt decibel value (dBm). For instruments with multiple channels, the allowable value of each channel shall be indicated. 3.15.5 Input impedance
The input resistance shall be expressed in 502 nominal (nominal), or expressed as not less than 1M2, not less than 500k, not less than 100k2. 14
SJ 20585-96
The input capacitance shall be expressed as no more than n×5pF (n is an integer of 120). 3.15.6 Voltage Standing Wave Ratio
The voltage standing wave ratio value shall be indicated in the detailed specification and may be expressed in frequency bands. 3.15.7 Waveform Adaptability
The instrument shall be able to adapt to a sine signal with an amplitude modulation of 30% (its envelope valley value shall be greater than the sensitivity value). 3.15.8 Accuracy
The accuracy of the instrument is expressed by formula (3):
±m digits±time base error
Where: ri is an integer of 1 to 9.
3.15.9 Resolution
The resolution of the instrument is expressed by formula (4):
±m digits
Where: m is an integer of 1 to 9 integer.
3.15.10 Gate time
The instrument should have at least the following two gate times: 0.1s.1s.3.15, 11 Display
·(3)
The instrument can be equipped with various display devices. The display on the instrument panel should be within 45 degrees of the vertical line of the panel and can be clearly read at a distance of 1m. The characters should be a single-sided digital display in horizontal rows: the measurement unit display should be selected from Hz, kHz, MHz, GHz
The display should be able to indicate that the measurement is in progress, and the display should blank the invalid zero value before the value. The display can have memory or non-memory mode. When the maximum value exceeds the overflow, there should be an overflow display indication. 3.15.12 Self-test function
The instrument should have a self-test function.
3.15.13 The following values of time base
shall be specified in the detailed specification: a. Nominal frequency: 10.5IMHz or 100kHz b. Aging rate: daily (week, month or year) not more than \×10-\ (can be 1.3.51# can be an integer between 5 and 15.
If necessary, the temperature change, frequency and voltage change, frequency load change, start-up characteristics, daily frequency stability (daily frequency fluctuation), second frequency stability, frequency accuracy, frequency adjustment range, frequency reproducibility and other requirements of the crystal oscillator can be regulated, which shall be specified in the detailed specification.
3.15.14 Standard frequency output
The frequency (5.MHz, 10MHz or time base nominal frequency) and voltage (effective value of voltage on 500 load) of the standard frequency output shall be specified in the detailed specification.
3.15.15 External frequency standard input
The frequency and voltage requirements for the external frequency standard input when the input impedance is not less than 1kN shall be specified in the detailed specifications. 3.15.16 Other performance characteristics
Microwave frequency meters designed for special purposes may specify other performance characteristics not specified in this specification in the detailed specifications. 51
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4 Quality assurance provisions
4.1 Inspection responsibilities
SJ20585--96
Unless otherwise specified in the order or the purchase order, the contractor shall be responsible for completing all inspections specified in this specification. If necessary, the ordering party or the superior appraisal agency has the right to inspect any of the inspection items mentioned. 4.2 Qualified responsibilities
The instrument must meet all the requirements specified in Chapter 3 and Chapter 5 of this specification. The inspections specified in this specification shall become an integral part of the contractor's inspection system or quality assurance 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-Conformity Sampling It is not allowed to submit products that are known to be defective, nor is it allowed to require the ordering party to accept defective products. 4.3 Inspection classification and test items
4.3.1 Inspection classification
The inspections specified in this specification are divided into:
a, identification inspection:
b. Quality consistency inspection,
4.3.2 Inspection grouping and inspection items
According to the provisions of Table 1 of Article 5.1.2 of SI20377, 4.4 Inspection conditions
4.4.1 Standard atmospheric conditions for the test
a. Temperature: 15~35F;
b. Relative humidity 20%~80%;
Air pressure: the air pressure of the test site.
4.4.2 Atmospheric conditions for arbitration
a, temperature: 23±2℃;
b, relative humidity: 50%±5%;
c, air pressure: 86-106kPar
4.5 Identification test
4.5.1 Test items and sequence
should be as specified in Table 2, and the sequence should be from Group A to Group C, Group D to Group E, and Group C and Group D can be carried out together. 4.5.2 Sampling plan
4.5.2.1A group inspection
Randomly select 5 prototypes for inspection.
Table 2 Appraisal inspection
Inspection items
Design and structure
Appearance and assembly
Overall dimensions
Weight and mechanical stability
Chapter number
Inspection method
Chapter number
Inspection group
Inspection items
Noise and ultrasonic pressure
Reliability
Electromagnetic compatibility
Maintainability
Environmental adaptability
Special environmental adaptability
Machine documents
! Packing and transportation
Warm-up time
Frequency measurement range
Sensitivity
Maximum input
Maximum non-burning power
Input follow-up impedance
Voltage unbalance
Waveform transparency
Accuracy
Resolution
Gate time
Self-test function
Standard frequency output
External frequency standard input
Note "\-||t t||一 indicates a mandatory item:
\○\ indicates an optional item·
indicates an undo item.
4.5.2.2 Group B inspection
Chapter number
SI20585-96
Continued Table 2
Inspection method
Chapter number
4.8.11.1~
4.8.11.11
4.8.11.12
4.8. 15.2
4.8.15.10
4.8.15.11
4.8.15.12
4.8.15.13
4.8. 15.14
4.8.15.15
Test points
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SI205B5-96
Test on 1 of the 5 samples that have passed the Group A test. 4.5.2.3 Group C test
Test on 3 of the samples that have passed the Group A and Group B tests. 4.5.2.4 Group D test
Test on 2 of the samples that have passed the Group A and Group B tests. 4.5.2.5 Group F inspection
is conducted on samples that have passed Group D inspection. When the number of Group E inspections exceeds the number of Group D inspections, the additional number of units can be drawn from samples that have passed Group C inspection. Maintainability test: conducted on 1 sample; a
Noise (acoustic deer) and ultrasonic pressure test; conducted on 2 samples: Dimensions and weight: conducted on 2 samples: Mechanical stability test: conducted on 2 samples: d.
Radiation test: conducted on 2 samples;
Packaging inspection is conducted on 2 samples,
Group F inspection| |tt||It is carried out on 5 samples that have passed the performance characteristics test. 4.5.3 Criteria for qualified identification inspection
The inspection and test results of Groups A to E meet the requirements of this specification and detailed specifications, and the inspection of Group F is judged to be accepted according to the test case in accordance with Articles 5.9 and 5.10 of S20375, the identification inspection shall be judged to be qualified. When fatal defects or serious defects are found in the inspections of Groups A to E as specified in Table 4, or the inspection of Group F is judged to be rejected, the identification inspection shall be judged to be unqualified.
4.6 Quality and consistency inspection
4.6.1 Inspection items and sequence
According to Table 3 It is stipulated in the regulations that the order is from Group B to Group C, Group ID and Group E are carried out, and Group C can be carried out at the same time as Group D. Table 3 Quality consistency inspection
Inspection items
Design and structure
Appearance and assembly
Dimensions
Weight and mechanical stability
Noise and ultrasonic pressure
Reliability
Electromagnetic compatibility
Maintenance
Article number
Inspection method
Article number
Inspection items]
Environmental adaptability
Special environmental adaptability
Random documents
Packaging and transportation
Warm-up time
Frequency measurement range
Sensitivity
Maximum input
Maximum non-burning power
Input impedance
VSWR
Waveform adaptability
Accuracy
Resolution
Gate time
Self-test function
Standard frequency output
External frequency input
Note: \————indicates a required item:
\○\———indicates an optional item;
indicates an unselected item:
4.6.2 Group A inspection
4.6.2.1 Sampling plan
Chapter number
SJ20585-96
Continued table 3
Inspection method
Chapter number
4.8.11.1 ~
4.8.11.11
4.8.11.12
4.8.15.10
4.8. 15.11
4.8.15.12
4.8.15.13
4.8.15.14
4.8.15.15
Each batch of products shall be inspected one by one according to the provisions of Table 3. Batch quality: The number of defects per 100 units of products shall not exceed 15. h
Among which the number of minor defects shall not exceed 10:
The number of serious defects shall not exceed 5.
4.6.2.2 Acceptance judgment number
For every 100 units of products, according to the inspection results, the cumulative number of defects does not exceed 15, and no fatal defects are found, then the batch of products is judged to have passed the Group A inspection.
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SJ20585-96
When serious defects are found during inspection, the unit product shall be rejected and allowed to be repaired before being re-delivered for inspection. When fatal defects are found during inspection, the batch of products shall be rejected. Find out the cause and re-inspect after taking corrective measures. 4.6.3 Group B inspection
4.6.3.1 Sampling plan
It shall be carried out in accordance with 5.3.3.1 of SJ20377 for products that have passed the Group A inspection. The special inspection level S-3 is adopted, the AQL for serious defects is 4, the AQL for minor defects is 10, or it may be specified in the detailed specifications according to the complexity of the product. 4.6.3.2 Acceptance judgment number
Based on the test results, judgment shall be made according to the sampling plan. When the number of defects is not greater than the acceptance judgment number, the B group inspection is judged to be qualified, and the unqualified products in the batch are repaired and the test is continued; when the number of defects is greater than the acceptance judgment number, the batch of products is judged to be unqualified in the B group inspection. 4.6.4 C group inspection
For batch-produced products, if the production interruption time is greater than six months, each batch should be subject to C group inspection. For continuously produced products, C group inspection should be carried out once a year. C group inspection is required when major design processes, components and materials are changed. 4.6.4.1 Sampling plan
Random sampling should be carried out from products that have passed the A group and B group inspections in accordance with 5.3.4.1 of SI20377. The special inspection level S-L is adopted, and the AQL of severe defects is 6.5, and the AQL of minor defects is 25, or it can be specified in the detailed specification according to the complexity of the product.
4.6.4.2 Qualification criteria
Based on the test results, the judgment shall be made according to the sampling plan. When the number of defects is less than the acceptance judgment number, the C group test is judged to be qualified, and the unqualified products in the batch are repaired and tested again; when the number of defects is greater than the acceptance judgment number, the C group test of the batch of products is judged to be unqualified.
4.6.5D group test
4.6.5.1 Sampling plan
The samples withdrawn from the D group should be randomly selected from the products inspected by groups A and B. The sampling method is 4.6.4.1.
4.6.5.2 Qualification criteria
The qualification criteria for special environmental tests are the same as those in 4.6.4.2 (may also be specified in the detailed specifications). The qualification criteria for electromagnetic compatibility tests shall be tested in accordance with 5.3.2 and 5,4.2 of SI20374. If one item fails, the batch of products shall be rejected.
4.6.6 Group E Inspection
4.6.6.1 Sampling Plan
Products for Group E inspection shall be randomly selected from the first batch of products that have passed Group A and Group B inspections. Sampling shall be in accordance with the following requirements:
a. Maintainability test: select 1 unit;
b. Noise (sound pressure) and ultrasonic pressure test: select 1 unit; c. Dimension and weight test: select 1 unit;
d. Mechanical stability test: select 1 unit; e. Radiation test:Pick 1 unit:
f. Packaging inspection: Pick 2 units;
4.6.6.2 Acceptance judgment number
Specified in the detailed specification. When the noise (sound pressure) and ultrasonic pressure test, or radiation test fails, the batch of products shall be rejected 10 —
4.6.7 Group F inspection
4.6.7.1 Sampling plan
SI 20585-96
The sampling of Group F inspection shall be carried out in accordance with the requirements of Article 5.3 of SJ20375, generally 10 units. 4.6.7.2 Acceptance judgment number
The judgment of reliability test shall be based on the test plan and the failure criteria of Article 5.9 and the acceptance and rejection judgment number requirements of Article 5.10 of SI20375, and specified in the detailed specification. 4.6.8 Acceptance judgment of quality consistency inspection Each group of inspection shall comply with the requirements of this specification and detailed specifications (unless otherwise permitted by the ordering party). The inspections of groups A to E shall all be qualified. If the inspection of group F is judged as accepted, the quality consistency inspection shall be qualified. Otherwise, it shall be judged as unqualified. 4.6.9 Defect classification
Defect classification is shown in Table 4.
Table 4 Defect classification
4.7 Packaging inspection
Requirements Article number
Inspection items
Appearance and assembly
Noise and ultrasonic pressure
Warm-up time
Preheating rate measurement range
Sensitivity
Maximum power
Maximum non-burning power
Input impedance
VSWR
Waveform adaptability
Accuracy
Resolution
Gate time
Self-test functionbZxz.net
Standard frequency output
Standard input
Inspection method Article number
4.8.15.10
4.8.15.11
4.8.15. 12
4.8.15.13
4.8.15.14
4.8.15.15
Defect classification
Minor defect
Minor defect
Fatal defect
Fatal defect
Fatal defect
Minor defect
Minor defect
Serious defect
Serious defect
Serious defect
Minor defect
Minor defect
Minor defect
Serious defect
Minor defect
Serious defect
Serious defect
Minor defect
Minor defect
— 11
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