SJ 20662-1998 General specification for airborne marker beacon receiver
Some standard content:
Military Standard of the Electronic Industry of the People's Republic of China FL5810
SI 20662 — 1998
General specification for
airborne marker beacon receiver1998-03-11issued
1998-05-01implemented
Ministry of Electronics 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 Qualification appraisal
3.2 Design and structure
3.3 Maintainability
3.4 Man-machine environment engineering
3.5 Safety
3.6 Interchangeability
3.7 Dimensions
3.8 Weight
3.9 Appearance quality
3 .10 Performance characteristics
Continuous working capability
3.2 Reliability
3.13 Electromagnetic compatibility
3.14 Environmental requirements
4 Quality assurance regulations
4.1 Inspection responsibility
4.2 Inspection classification
4.3 Inspection conditions
4.4 Identification inspection
4.5 Quality consistency inspection
4.6 Packaging inspection
4.7 Inspection method
5 Delivery preparation
6 Notes
6. Intended use
6.2 Contents of ordering documents:
6.3 Definition.
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People's Republic of China Electronic Industry Military Standard Airborne Marker Beacon Receiver General Specification
General specification for
airborme marker beacon receiver1 Scope
1.1 Subject Content
SI 20662 1998
This specification specifies the general requirements, quality assurance regulations and delivery preparation for airborne marker beacon receivers. 1.2 Scope of Application
This regulation applies to airborne marker beacon receivers (hereinafter referred to as receivers) used for route flight and approach landing, and is the basis for formulating receiver product specifications.
2 Referenced Documents
GJB150.1-86 General Rules for Environmental Test Methods for Military Equipment GJB150.2-86 Environmental Test Methods for Military Equipment Low Pressure (Altitude) Test GJB150.3—86 Environmental Test Methods for Military Equipment High Temperature Test GJB150.4-86 Environmental Test Methods for Military Equipment GJB150.6—86 Environmental Test Methods for Military Equipment Low Temperature Test
Temperature and Altitude Test
GJB150.9--86 Environmental Test Methods for Military Equipment Wet Heat Test
Mold Test
GJB150.10—86 Environmental Test Methods for Military Equipment GJB150.11-86 Environmental Test Methods for Military Equipment Salt Spray Test GJB 150.13—86 Environmental Test Methods for Military Equipment 86
Explosive atmosphere test
Environmental test methods for military equipment
Acceleration test
Environmental test methods for military equipment
CJB 150.15 --- 86
5Environmental test methods for military equipment Vibration test GJB 150.16 86
GJB150.18-86Environmental test methods for military equipment Shock test GJB151.2-186Electromagnetic emission and sensitivity requirements for military equipment and subsystems Requirements for airborne equipment and subsystems (including corresponding ground support equipment) (Class A1) GJB152-86Electromagnetic emission and sensitivity measurement for military equipment and subsystems 1998-03-11 Issued
Ministry of Electronics Industry of the People's Republic of China
1998-05-01 Implementation
SJ 20662 --- 1998
GJB 179-86 Counting sampling inspection procedures and tables GJB367.1-87 General technical conditions for military communication equipment Design and manufacturing requirements GJB367.5-87 General technical conditions for military communication equipment Packaging, transportation and storage requirements GJB368.2-87 General specification for equipment maintainability Basic requirements GJB368.5-87 General specification for equipment maintainability Test and evaluation of maintainability GJB441-88 Installation form and basic dimensions of chassis and mounting racks of airborne electronic equipment GJB457--88 General specification for airborne electronic equipment GJB899-90 Reliability identification and acceptance test GJB900-90 General outline for system safety 3 Requirements
3.1 Qualification identification
The receivers submitted in accordance with this specification should be those that have passed the identification or have been approved for finalization. 3.2 Design and Structure
The design and structure of the receiver shall comply with the requirements of Article 6.1 of GJB 457 and Articles 1.1, 1.3 ~ 1.8, 1.11 ~ 1.21 of GJB 367.1.
3.3 Maintainability
The maintainability of the receiver shall comply with the relevant requirements of GJB368.2, and its mean time to repair (MTTR) shall be specified by the product specification.
3.4 Man-machine environment engineering
The man-machine environment engineering of the receiver shall comply with the requirements of Article 6.8 of GJB457. 3.5 Safety
The safety of the receiver shall comply with the requirements of Articles 6.6 and 6.7 of GJB457. 3.6 Interchangeability
The interchangeability of the receiver shall comply with the requirements of Article 6.11 of GJB457. After the whole part (component) of the receiver is interchanged, the receiver should be able to work normally.
3.7 Dimensions
The dimensions of the receiver should meet the requirements of Article 4.2.1 of GJB441. 3.8 Weight
The weight of the receiver should meet the requirements of Article 4.2.4 of GJB441. 3.9 Appearance Quality
The surface plating (coating) layer of the receiver should be uniform, smooth and beautiful, and should not have defects such as bubbles, cracks, condensation, rust, and shedding. Various characters and symbols should be clear and neat. 3.10 Performance Characteristics
3.10.1 Receiver Sensitivity (See Article 4.7.10.1) The receiver should have at least two (high and low) preset sensitivities for the driver to choose, and the sensitivity of the receiver can be set to any value within the range of 200~4000V through the device for adjusting the sensitivity level. The specific setting value of the receiver sensitivity is specified by the product specification.
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3.10.2 Audio response (see 4.7.10.2) SJ 20662 — 1998
When the modulation frequency of the input RF signal is 400Hz±5%, 1300Hz±5% and 3000Hz±5%, the change of the receiver audio output relative to the standard test signal of 10 times the receiver sensitivity value should not exceed 9dB. 3.10.3 Indicator frequency response (see 4.7.10.3) When the modulation frequency of the input RF signal is 400±10Hz, 1300±30Hz and 3000±80Hz, the change of the receiver sensitivity should not exceed 9pB.
3.10.4 Selectivity (see 4.7.10.4) Within the frequency range of 75MHs±20kHz, the attenuation of the receiver output should not be greater than 6clB; outside the frequency range of 75MHz±125kHz, the attenuation of the receiver output should not be less than 60dB. 3.10.5 Audio output power (see 4.7.10.5) When the receiver is input with a standard test signal of a tuning frequency of 1300Hz and a level 10 times the receiver sensitivity value, its audio output power should not be less than the rated value. When the modulation frequencies are 400Hz and 3000Hz respectively, the change of audio output relative to the audio output of 1300Ha modulation signal should not be greater than 3dB: 3.10.6 Frequency accuracy (see 4.7.10.6) The frequency accuracy of the receiver should not be worse than ±5×10-3. 3.10.7 Automatic gain control (see 4.7.10.7) When the level of the receiver input standard test signal changes from 3000mV to 100000μV, the change of its audio output should not be greater than 30%.
3.10.8 Distortion (see 4.7.10.8) When the level of the input RF signal changes from the receiver sensitivity value to 200000μV, the distortion of the receiver audio output should not be greater than 30%.
3.10.9 Receiver input working level difference (see 4.7.10.9) The ratio of the input RF signal level required to reach the indicator light on voltage when the receiver input RF signal level rises to the input RF signal level required to reach the same indicator light voltage when the input RF signal level falls shall not exceed ±4dB. 3.10.10 Indicator light start-keying (see 4.7.10.10) When the audio modulation of the standard test signal applied to the receiver is keyed (6 points per second and 2 strokes per second, respectively), the RF and audio indications shall be synchronized with the keying at all positions of the RF gain within the receiver sensitivity value to 50,000sV. The ratio of the modulation on and off time of the points is 1:1. 3.10.11 Receiver signal-to-noise ratio (see 4.7.10.11) When the level of the standard push test signal changes from the receiver sensitivity setting value to 100,000μV, the signal-to-noise ratio of the receiver audio output shall be not less than 20dB.
3.10.12 Cross-modulation (see 4.7.10.12) 3.10.12.1 When a non-modulated signal with a frequency of 75MHz and a level of any value between the receiver sensitivity value and 50000uV and a radio frequency signal with a frequency of 65~85MHz (except the 74.5~75.5MHz band), a decay rate of 30%, modulation frequencies of 400, 1300, 3000Hz, and a level of 0.15V are applied to the receiver at the same time, the receiver indication The indicator light should not be turned on and the audio output should be lower than half of its rated value. 3.10.12.2 When a non-modulated signal with a frequency of 75MHz and a level equal to the receiver sensitivity and a modulated signal with a frequency of 72.02~74.58MHz and 75.42~75:98MHz, a modulation frequency of 1300Hz, a frequency deviation of ±15kHz and a voltage of (0.5V) are applied to the receiver at the same time, the indicator light of the receiver should not be turned on and the direct audio output should be lower than half of its rated value. 3
SJ 20662 - 1998
3.10.12.3 When a non-modulated signal with a frequency of 75MHz and a level equal to the receiver sensitivity value and a 3.5V TV signal from channels 2 to 6 are applied to the receiver at the same time, the indicator light of the receiver should not turn on and the audio output should be less than half of its rated value.
3.10.13 False signal response (see 4.7.10.13) 3.10.13.1 ...50kHz to 1215MHz (except for the 65 to 85MHz band) is applied to the receiver, the receiver should not turn on. 3.10.13.2 When the receiver is subjected to a modulation signal with a frequency of 72.02~74.58MHz and 75.42~75.98MHz, a modulation frequency of 400, 1300, 3000Hz, a frequency deviation of ±15kHz, and a level of 0.5V, the indicator light of the receiver should not be turned on, and the audio output should be less than half of its rated value. The indicator light should not turn on and the audio output should be less than half of its rated value. 3.10.13.3 When a 3.5V TV signal from channel 2 is applied to the receiver, the indicator light of the receiver should not turn on and the audio output should be less than half of its rated value. 3.10.14 Reduction of receiver recording accuracy (see 4.7.10.14) 3.10.14.1 When a non-modulated signal with a frequency of 50kHz~1200MHz (except 63~85MHz band) and a level of 0.5V is applied to the receiver , the increase in receiver sensitivity should not exceed 3dB. 3.10.14.2 When a modulated signal with a frequency of 72.(2~74.58MHz and 75.42~75.98MHz, a modulation frequency of 1300Hz, a frequency deviation of ±15kHz, and a level of 0.5V is added to the receiver, the increase in receiver sensitivity should not exceed 4dB. 3.10.14.3 When a 3.5V TV signal of Channels 4~5 is added to the receiver, the increase in receiver sensitivity should not exceed 4dB.
3.10.15 Change in receiver sensitivity (see 4.7.10.15) The square root of the sum of the squares of the maximum deviations of the receiver sensitivity caused by the following conditions shall not be greater than 13dB: a. The frequency of the input RF signal varies within the range of 74.990~75.010MHz (0B at 75.000MHz); b. The modulation frequency of the input signal varies within the range of ±2.5% of its specified value (400, 1300, 3000Hz modulation frequency (dB):
c. The modulation index of the input signal varies within the range of 91%~99% (0dB at 95% modulation index); d. The power supply voltage varies within the range of ±10% of its rated value (0dB at the design rated value); e. The temperature changes under the specified environmental conditions (0dB at 20°C); f. The atmospheric pressure changes under the specified environmental conditions. changes (0dB at 101.3kPa); g. after damp heat test (initial measurement value is OdB); h. when vibrating under specified vibration stress conditions (OdB when not vibrating) 3.11 Continuous working capability
Under the standard atmospheric conditions of the test, after the receiver works continuously for 12 hours, its receiver sensitivity, selectivity and audio output power shall meet the requirements of 3.10.1, 3.10.4 and 3.10.5 respectively. 3.12 Reliability
The minimum acceptable value of the mean time between failures (MTBF) of the receiver shall be specified by the product specification. 3.13 Electromagnetic compatibility
The electromagnetic compatibility of the receiver shall comply with the relevant requirements of Class AIb in CIB1S1.2. 3.14 Environmental requirements
3.14.1 Low leakage
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SJ 20662 - 1998
The operating temperature is -50℃ and the storage temperature is 55℃. 3.14.2 High temperature
The operating temperature is 60℃ and the storage temperature is 70℃. 3.14,3 Low pressure (altitude)
The maximum operating altitude of the receiver is 15250m (pressure 11.83kPa). 3.14.4 Humidity
The receiver shall be able to withstand the humidity test specified in Table 1. Table 1 Humidity test conditions
High temperature and high humidity stage
Relative condensation
Note: 1) One cycle is 24hc
3.14.5 Temperature-altitude
Low temperature and high humidity stage
Relative humidity
Test cycle\
The receiver shall be able to withstand the temperature-altitude test specified in Table 2 of CJB150.6 for equipment level "5". 3.14.6 Vibration
The receiver shall be able to withstand the vibration tests specified in Table 2 and Table 3. Table 2 Vibration stress
Frequency range
5 - 20
20 ~ 2000
Fixed frequency time at each resonance point
3.14.7 Impact
Displacement (double amplitude)
Table 3 Test time (each axial direction)
Sine sweep time
Acceleration
5~~2000~5Hz Sweep time
The receiver shall be able to withstand the impact tests specified in Table 2 of "Test 5 Basic Design Test" and Table 3 of "Test 6 Crash Safety Test" in GJB150.18.
3.14.8 Acceleration
The receiver shall be able to withstand the acceleration test specified in Table 4. Test
Pressure acceleration
Helicopter
Other aircraft
Helicopter
Other aircraft
3.14.9 Fungus
$1 20662 — 1998
Table 4 Acceleration test values
Aircraft acceleration direction
The receiver shall be able to withstand the fungus test specified in JB150.10. Long level is specified by product specification 3.14.10 Salt spray
The receiver shall be able to withstand the salt spray test specified in GIB150.11. 3.14.11 Explosive atmosphereWww.bzxZ.net
The receiver shall be able to withstand the explosive atmosphere test specified in GB150.13. 4 Quality assurance provisions
4.1 Inspection responsibility
Unless otherwise specified in the contract, the contractor shall be responsible for completing all inspections of this specification. If necessary, the ordering party or the superior appraisal agency has the right to inspect any of the inspection items described in the specification. 4.1.1 Responsibility for Conformity
All receivers must comply with the relevant requirements in Chapter 3 and Chapter 5 of this specification. The inspections specified in this specification should become an integral part of the contractor's entire inspection system or quality program. If the contract includes inspection requirements not specified in this specification, the contractor shall also ensure that the submitted receivers comply with the contract requirements. It is not allowed to submit receivers that are known to be defective in the sampling of quality consistency inspection, and the ordering party cannot be required to accept defective receivers. 4.2 Inspection classification
The inspections specified in this specification are divided into:
. Identification inspection;
b. Quality consistency inspection.
4.3 Inspection conditions
Unless otherwise specified, all inspections shall be carried out under the conditions specified in Articles 3.1 to 3.4 of GJB150.1.4.4 Identification inspection
Identification inspection shall be carried out in a laboratory approved by the ordering party or the superior identification agency. The samples subjected to identification inspection shall be receivers produced with the equipment and normal processes commonly used in production. Identification inspection is generally only carried out when the receiver design and production are finalized. However, when there are major changes in the main design, process, components and materials that affect the performance of the receiver and make the conclusion of the original identification test no longer valid, a performance test should also be carried out: 4.4.1 Number of samples
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The number of samples subjected to identification test should be determined according to the size of the receiver production identification batch and the inspection cost, but generally should not be less than two.
4.4.2 Inspection items
The inspection items of the identification test are shown in Table 5. Table 5 Inspection items
Design and structure
Maintainability
Man-machine environment engineering
Safety
Interchangeability
Dimensions
Appearance quality
Receiver sensitivity
Audio response
Indicator frequency response
Selectivity
Audio output power
Frequency accuracy
Automatic gain control
Distortion
Receiver input working level difference
Indicator light start-button control
Receiver signal-to-noise ratio
Cross-branch modulation
False signal response
Reduction of receiver sensitivity
Change of receiver sensitivity
Continuous working capability
Reliability
Electromagnetic compatibility
Quality consistency inspection
Chapter number
Inspection method
Chapter number
4.7. 10.8
4.7.10.10
4.7.10.11
4.7.10.12
4.7.10.13
4.7.10.14
4.7.10.15
Duty classification
Low pressure (altitude)
Temperature altitude
Acceleration
Explosive atmosphere
SI 20662 --- 1998
Identification inspection
Quality consistency inspection
Group C|Group D
Note: ① The items marked with "O" in the table are mandatory items, and those marked with "△" are optional items. ② In the "Defect classification" column in the table, "B" is a serious defect and "C" is a minor defect. 4.4.3 Qualification criteria
Chapter number
When all inspection items can meet the requirements of this specification, it is judged to be qualified for identification inspection. Inspection method
Chapter number
4.7.14.10
4.7.14.11
Fault classification
If any item does not meet the requirements of the specification, the inspection should be stopped. After analyzing the unqualified items, finding out the causes of the defects and taking corrective measures, the inspection can be continued. If all inspection items meet the requirements of the specification after continued inspection, it is still judged to be qualified for identification inspection. If there is still an item that does not meet the requirements of the specification after continued inspection, it is judged to be unqualified for identification inspection.
4.4.4 Maintenance of qualified identification qualification
In order to maintain the qualification of qualified identification inspection, the contractor shall provide the test data of the product to the ordering party or the superior identification agency according to its requirements.
4.5 Quality consistency inspection
4.5.1 Inspection grouping
Quality consistency inspection is divided into Group A, Group C and Group D inspection. 4.5.2 Submission of inspection batch
Submission of inspection batch shall comply with the provisions of Article 3.6 of GJB179. 4.5.3 Group A inspection
4.5.3.1 Inspection items
The inspection items of Group A are shown in Table 5.
4.5.3.2 Sampling plan
The sampling plan of Group A inspection shall be carried out in accordance with the relevant provisions of CJB179. The inspection shall start from normal inspection, adopt general inspection level II, and the acceptable quality level shall be selected from Table 6. TYKAOIKAca-
Serious defects
Minor defects
4.5.3.3 Qualification criteria
SJ 20662 1998
Table 6 Acceptable quality level (AQL)
According to the inspection results, if the number of defects found is not greater than the qualified judgment number, the group A inspection of the batch of receivers is judged to be qualified, otherwise, the group A inspection of the batch of receivers is judged to be unqualified. 4.5.3.4 Re-inspection
For the batch that fails the group A inspection, the contractor shall analyze the batch of receivers, find out the cause of the defects and take corrective measures, and then resubmit for inspection. The resubmitted batch shall be marked with "resubmitted batch" and stricter inspection shall be adopted. If the re-inspection is qualified, the batch of receivers shall be judged to be qualified for the group A inspection. If it is still unqualified, the batch of receivers shall be rejected. 4.5.3.5 Sample Handling
Batches that have passed the Group A inspection can be delivered as qualified products after the defective samples have been repaired and meet the specified performance requirements.
4.5.4 Core Group Inspection
Group C inspection should be carried out on samples that have passed the Group A inspection. 4.5.4.1 Inspection Items
The inspection items of Group C are shown in Table 5
4.5.4.2 Sampling Plan
The sampling plan for Group C inspection shall be carried out in accordance with the relevant provisions of GJB179. The inspection shall start from the normal inspection, adopt the special inspection level S-4, and the acceptable quality level shall be selected from Table 6. 4.5.4.3 Qualification Criteria
Based on the inspection results, if the number of defects found is not greater than the qualified judgment number, the core group inspection shall be judged as qualified, otherwise, the Group C inspection shall be judged as unqualified.
4.5.4.4 Re-inspection
If the C group inspection fails, the inspection and delivery shall be stopped, and the contractor shall inform the ordering party or the superior appraisal agency of the non-conformity. After finding out the cause and taking corrective measures, the inspection may be resubmitted. During the re-inspection, a stricter inspection shall be adopted. The re-inspection shall be carried out according to the opinions of the ordering party or the superior appraisal agency, or only the non-conformity items shall be inspected.
If the re-inspection fails, the non-conformity shall be notified to the superior appraisal agency. 4.5.4.5 Sample processing
Unless otherwise specified, if the C group inspection passes, the sample inspected by the C group shall be refurbished and passed the A group inspection, and then it can be delivered to the ordering party as a qualified product.
4.5.4.6 Period of C group inspection
Unless otherwise specified, the C group inspection shall be carried out once every three batches, but not less than once a year. When the design, process, components and materials are changed so that the original C group inspection conclusion is no longer valid, the C group inspection should also be carried out: 4.5.5 D group inspection
D group inspection should be carried out on the receivers of the A group inspection qualified batch 4.5.5.1 Inspection items
D group inspection items are shown in Table 5.
4.5.5.2 Selection of samples
SJ 20662—1998
The selection of D group inspection samples should comply with the provisions of Article A3.3.1 in Appendix A (Supplement) of GB899. 4.5.5.3 Unqualified
If the D group inspection fails, the acceptance and delivery of the product should be stopped. The contractor should notify the superior appraisal agency of the unqualified situation. After taking corrective measures, all tests or inspections should be carried out again according to the opinions of the superior appraisal agency, or only the unqualified items should be tested or inspected. If the test still fails, the superior appraisal agency shall be notified of the failure.
4.5.5.4 Sample handling
Unless otherwise specified, samples that have passed the Group D inspection shall be refurbished by the contractor to restore them to the specified technical state, and replace faulty parts (components) and parts (components) whose performance has not exceeded the specified tolerance but has been degraded. All refurbished receivers can be delivered according to the contract or billing order after passing the Group A inspection again. 4.5.5.5 Group D inspection cycle
The Group D inspection cycle is specified by the product specification or contract. However, when there are major changes in the receiver design, process and raw materials, Group D inspection should also be carried out.
4.6 Packaging inspection
The items, sampling plan and qualification criteria of packaging inspection shall be determined by the product specification. 4.7 Inspection method
4.7.1 Inspection requirements
4.7.1.1 Receiver Adjustment
Before the specified test, the receiver under test shall be accurately adjusted or adjusted according to the operating method specified by the contractor.
4.7.1.2 Protective measures for test instruments
During the test, protective measures shall be taken to avoid errors caused by connecting voltmeters, signal generators and their instrument surfaces across the input and output impedances of the receiver. 4.7.1.3 Load connection
Unless otherwise specified, all tests shall be performed with the receiver connected to a load with its designed characteristic impedance value. 4.7.1.4 Impedance and voltage of RF signal source The impedance of the RF signal source shall consist of a 500±10% resistance and inductance component. The RF voltage input to the receiver shall be an open circuit voltage. This voltage can be obtained by connecting a 6dB attenuator between the output of the calibrated RF signal source and the input of the receiver. When the design impedance of the receiver is not 500, the RF input voltage value shall be calculated accordingly according to the following formula. U2=VUR/50
Wherein: 2—RF input voltage, i.e., the RF input voltage used when the input characteristic impedance of the receiver is not 500, V;
t-—specified input voltage, V;
R—receiver input impedance, 0.
4.7.1.5 Standard test signal
The carrier frequency is 75MHz±0.005%, the modulation index is 95%±3%, and the modulation frequencies are 400Hz±1%, 10
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