This specification applies to the demonstration, design, manufacture, inspection and acceptance of radio stations for artillery position communication and command systems, and is also the basic basis for formulating product specifications and signing contracts. SJ 20692-1998 General Specifications for Radio Stations for Artillery Position Communication and Command Systems SJ20692-1998 Standard download decompression password: www.bzxz.net

Military Standard of the Electronic Industry of the People's Republic of China FL5820
SJ 20692—1998
General specification of radicfor artillery position communicationcommand system
Published on March 18, 1998
Implemented on May 1, 1998
Approved by the 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
Qualification appraisal
Appearance quality
Mark and code
Safety
Maintainability
Interchangeability
Performance characteristics
Working capability inspection
￥Environmental requirements
5 Continuous working capability
6 Electromagnetic compatibility
7 Reliability
4 Quality assurance regulations
Inspection responsibility
Inspection classification||t t||Test conditions·
Defect classification…
Identification test·
Quality consistency test
Packaging test·
Test method·
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Packaging test
Delivery preparation
5.1 Sealing and packaging
Transportation, storage
5.3 Marking
Instructions
6.1 Intended use
6.2 Contents of ordering documents**
Appendix A Radio station defect classification (supplement)
1 Scope
Electronic industry military standard of the People's Republic of China Artillery position communication command system
General specification for radio stations
General Specification of radio for artillery position communication command system1.1 Subject content
SJ 20692--1998
This specification specifies the requirements for radio stations of artillery position communication command system, quality assurance regulations, delivery preparation and instructions, etc.
1.2 Scope of application
This specification applies to the demonstration, design, manufacture, inspection and acceptance of radio stations of artillery position communication command system, and is also the basic basis for formulating product specifications and signing contracts. 2 Reference Documents
GB191—90 Packaging, Storage and Transportation Pictorial Marking
GIB/Z57-94 Maintainability Distribution and Prediction ManualGJB151A—97 Requirements for Electromagnetic Emission and Sensitivity of Military Equipment and SubsystemsGJB152A~-97 Measurement of Electromagnetic Emission and Sensitivity of Military Equipment and SubsystemsGJB179A-96 Counting Sampling Inspection Procedures and TablesGJB238A Measurement Methods for Tactical FM Radios
GJB367.1~87 General Technical Conditions for Military Communication EquipmentDesign and Manufacturing RequirementsGJB367.2—87 General Technical Conditions for Military Communication EquipmentEnvironmental Test MethodsG3B367.3—87 Military Communication Equipment General technical conditions for communication equipment Reliability identification test and acceptance test methods GB367.5-87 General technical conditions for military communication equipment Packaging, transportation and storage requirements GB368A-94 General technical conditions for equipment maintainability Basic requirements for maintainability GB2072-94 Maintainability test and evaluation
3 Requirements
3.1 Qualification
The Ministry of Electronics Industry of the People's Republic of China 1998-03-18 KAONKAca
199B-05-01 Implementation
SJ206921998
Products submitted in accordance with this specification should be qualified products or approved products. 3.2 Design
The radio station should be designed in accordance with the requirements of this specification and should comply with the relevant provisions of Chapter 1 of GJB367. The radio station should have the ability to transmit data at a rate not exceeding 2400 bit/s. The working mode is simplex analog FM, and it can also transmit data with FSK modulation: it has the functions of no squelch and 150Hz single-tone squelch; the volume is adjustable. 3.3 Structure
The structure of the radio shall comply with the requirements of Article 15 of GJB367.1, and its detailed requirements shall be specified by the product specification. 3.4 Appearance quality
The appearance of the radio shall be complete, neat, and free of obvious mechanical damage. The coating shall comply with the provisions of Article 2.6 of GJB367.1.
3.5 Dimensions
The external dimensions of the radio shall be specified by the product specification. 3.6 Weight
The total weight of the radio when working shall not exceed 2.5kg. 3.7 Color
The color of the outer surface of the radio is matte grass green. 3.8 Signs and codes
The radio shall have a permanent nameplate, which shall indicate the product name or code, serial number, manufacturer, and date of manufacture.
3.9 Safety
The safety design of the radio shall comply with the requirements of Article 1.8 of GJB367.1. The specific requirements shall be specified by the product specifications. 3.10 Maintainability
The maintainability design shall comply with the requirements of Article 1.6 of GJB367.1 and GJB368A, GJB/Z57. The specific requirements shall be specified by the product specifications.
3.11 Interchangeability
The interchangeability of the radio shall comply with the requirements of Article 1.7 of GJB367.1. The specific requirements shall be specified by the product specifications. 3.12 Performance characteristics
3.12.1 Overall electrical performance
3.12.1.1 Frequency range (see Article 4.8.5.1) The frequency range of the radio is 40~53 MHz. 3.12.1.2 Channel spacing (see Article 4.8.5.2) The channel spacing of the radio is 25kHz.
3.12.1.3 Frequency error (see 4.8.5.3) The frequency error of the radio shall not exceed ±1×10-5. 3.12.1.4 Power supply voltage (see 4.8.5.4) - 2 -
SJ 20692—1998
The rated voltage of the DC power supply used by the radio is 12V. The negative pole of the power supply shall be grounded. Unless otherwise specified, when the power supply voltage varies within the range of 85% to 110% of the rated value, the performance indicators of the radio shall meet the requirements of the product specification. 3.12.1.5 RF interface and impedance (see 4.8.5.5) The radio's RF interface is TNC type, with an input or output impedance of 502. 3.12.1.6 Audio interface and impedance (see 4.8.5.6) The audio interface is generally FQ14-7Z, where the interface relationship is: pin 1 - ground; pin 2 - telephone; pin 3 - earphone; pin 4 - power supply; pin 6 - PTT; pin 7 - squelch output signal. At 1000Hz audio, the impedance between pins 2, 3 and 1 is 6002. 3.12.1.7 Transmit-receive conversion time (see 4.8.5.7) The conversion time from receiving to transmitting on the radio should not exceed 50ms. 3.12.1.8 Antenna (see 4.8.1)
The antenna should be equipped with two forms: backpack and vehicle-mounted. The length of backpack antenna is usually 0.3m and 1.3m, and the length of vehicle-mounted antenna is usually 1.5m
3. 12.2 Electrical performance of receiver
3.12.2.1 Sensitivity (see 4.8.6.1) a: When the audio output of the receiver is rated, in order to obtain a 12dB signal-to-noise ratio, the RF input signal voltage should not be greater than 0.5μY;
b. At the extreme operating temperature, in order to obtain a 12dB signal-to-noise ratio, the RF input signal voltage should not be greater than 0.7uV. 3.12.2.2 Noise suppression sensitivity (see 4.8.6.2) a. The noise suppression sensitivity should be less than 0.5uV: b. It should be less than 1 μV at the extreme operating temperature. 3.12.2.3 Audio output (see 4.8.6.3) The rated output voltage of the receiver is 0.7V, and the maximum output voltage shall not be less than 1.5V. 3.12.2.4 Audio harmonic distortion coefficient (see 4.8.6.4) The audio harmonic distortion coefficient at rated audio output shall not be less than 10%. 3.12.2.5 Maximum audio output signal-to-noise ratio (see 4.8.6.5) The maximum audio output signal-to-noise ratio shall not be less than 40dB. 3.12.2.6 Limiting characteristics (see 4.8.6.6) When the receiver input signal is 3 to 100dB higher than the rated sensitivity, the change of its audio output signal shall not be greater than 3dB. 3.12.2.7 Intermediate frequency selectivity (see 4.8.6.7) Receiver intermediate frequency selectivity: 6dB bandwidth is not less than 16kHz and 40dB bandwidth is not less than 40kHz.
50dB bandwidth is not less than 50kHz
3.12.2.8 Intermediate frequency suppression (see 4.8.6.8) Intermediate frequency suppression should be no less than 80dB.
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3.12.2.9 Image frequency suppression (see 4.8.6.9) Image frequency suppression should be no less than 70dB.
3.12.2.10 Intermodulation immunity (see 4.8.6.10) Intermodulation immunity should be no less than 70dB.
3.12.2.11 Pilot tone attenuation (see 4.8.6.11) The pilot 150Hz tone attenuation should be no less than 26dB. 3.12.2.12 Audio Response (see 4.8.6.12) For 300-3000 Hz, the audio variation relative to 1000 Hz shall be within 6 dB. 3.12.2.13 Squelch Control Signal Output (see 4.8.6.13) When the squelch is on, the squelch control signal output DC voltage shall be greater than 10V on a 10k2 load. When the squelch is off, the squelch control signal output DC voltage shall be less than 1V on a 10k2 load. 3.12.2.14 Self-combined Interference Point (see 4.8.6.14) The number of channels where the sensitivity of the station drops by more than 3B due to internal interference shall not exceed 1% of the total number of channels. 3.12.2.15 DC Power Consumption (see 4.8.6.15) The DC power consumption of the receiver shall be specified by the product specification. 3.12.2.16 Conducted spurious emission (see 4.8.6.16) The conducted spurious emission on the antenna terminal should not be greater than 50μV. 3.12.3 Electrical performance of the transmitter
3.12.3.1 Carrier power (see 4.8.7.1) The carrier power is divided into two levels, the low power level should not be greater than 0.3W, and the high power level should not be less than 1W. When the power supply voltage is 85% of the rated value or at the extreme operating temperature, the carrier power is allowed to drop by 1dB. 3.12.3.2 Spurious emission components (see 4.8.7.2) The spurious emission components are:
a. Harmonic emission components should be less than -40dB;
b. Non-harmonic emission components should be less than -60dB, 3.12.3.3 Output circuit protection (see 4.8.7.3) When the transmitter is at high power output, the antenna is short-circuited or open-circuited for 3min, which should not cause permanent degradation of performance. 3.12.3.4 Pilot tone frequency (see 4.8.7.4) Pilot tone frequency shall be 150±2Hz.
3.12.3.5 Pilot frequency deviation (see 4.8.7.5) The frequency deviation shall be 2.5±0.5kHz.
3.2.3.6 Modulation limitation (see 4.8.7.6) The telephone input level shall be increased by 20dB on the basis of obtaining the rated frequency deviation of 5kHz, and the increase of modulation frequency deviation shall not exceed 3dB
3.12.3.7 Modulation sensitivity (see 4.8.7.7) - 4 -
SJ 20692—1998
The audio input voltage required to produce the rated frequency deviation of 5kHz shall not be greater than 15mV. 3.12.3.8 Modulation characteristics (see 4.8.7.8) Within the range of 300 to 3000 Hz, the modulation change relative to 1000 Hz shall not be greater than 6 dB. 3.12.3.9 Audio harmonic distortion coefficient (see 4.8.7.9) The audio harmonic distortion coefficient shall not be greater than 10%. 3.12.3.10 Residual FM (see 4.8.7.10) The residual FM shall be less than 40 dB.
3.12.3.11 Frequency lock time (see 4.8.7.11) The frequency lock time of the transmitter from the receiving state to the transmitting state shall not be greater than 50 ms. 3.12.3.12 DC power consumption (see 4.8.7.12) The DC power consumption of the transmitter shall be specified by the product specification. 3.13 Workability inspection
The workability inspection shall include:
a: The mechanical and electrical performance of all switches, buttons and knobs shall be normal; b: Various function indications shall be normal;
c. Reception or transmission at high, medium and low frequencies within the working frequency band shall be normal; d. The radio shall be connected to the specified terminal equipment and reception and transmission shall be normal. 3.14 Environmental requirements
3.14.1 Temperature
3.14.1.1 Working temperature
The working ambient temperature range: -40～55°C. 3.14.1.2 Storage temperature
Storage temperature range: -50～65°C.
3.14.2 Low pressure
The low pressure of the radio shall comply with the severe level requirements specified in GJB367.2 &403 Low pressure test". Test pressure 57.0kPa, test temperature 15~35°C, test time 60min. 3.14.3 Immersion
The immersion of the radio shall be in accordance with the test conditions specified in "405 Immersion Test" in GJB367.2. The immersion depth is 1m. 3.14.4 Impact
The impact of the radio shall be in accordance with the requirements of the severity level of the basic design test in Table 408-1 of "408 Impact Test" in GJB367.2.
3.14.5 Vibration
The alarm of the radio shall be in accordance with the requirements of the severity level of Table 409-1 and Curve V of 4092 of "409 Vibration Test" in GJB367.2.
3.14.8 Rain
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The radio station’s rain test shall comply with the requirements of Method 1 of Test Procedure 4.1 of “410 Rain Test” in GJB367.2. 3.14.7 Humidity and Heat
The radio station’s humidity and heat shall comply with the requirements of the severity level of ground and airborne communication equipment in “411 Humidity and Heat Test” in GJB367.2.
3.14.8 Salt Level
The radio station’s salt level shall comply with the severity level requirements of “413 Salt Spray Test” in GJB367.2. Spray continuously for 48 hours. There shall be no obvious rust, blistering, or loosening of the coating on the outer surface of the parts. 3.15 Continuous working capability
Using an external power supply, within the specified voltage and temperature range, the radio station receives for 9 minutes and transmits for 1 minute alternately. After 12 hours, the measurement according to Table 1 should meet the specified requirements. Table 1
Inspection items
Sensitivity
Static sensitivity
Audio output
Carrier power
Frequency error
Modulation sensitivity
3.16 Electromagnetic compatibility
3.16.1 Radiation of control line and housing
Technical requirements Chapter, article number
Radiated emission limit value shall comply with the relevant requirements in GJB151A. 3.16.2 Conducted sensitivity of control line
The conducted sensitivity of control line shall comply with the relevant requirements in GJB151A. 3.17 Reliability
Test method Chapter, Article
The compatibility design of the radio shall comply with the requirements of Article 1.3 of GJB367.1, and the lower limit of the mean time between failures (MTBF) value (e) shall be specified by the product specification. 4 Quality Assurance Provisions
4.1 Inspection Responsibility
Unless otherwise specified in the contract or 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 inspection item described in the specification. 4.1.1 Qualification Responsibility
All products must comply with all requirements of Chapters 3 and 5 of the specification. The inspections specified in this specification shall become an integral part of the contractor's overall inspection system or quality assurance program. Or 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 does not allow the submission of products that are known to be defective, nor does it allow the ordering party to be required to accept defective products. 4.2 Inspection categories
The inspection categories specified in this specification are divided into:
a. Appraisal inspection:
b. Quality consistency inspection.
4.3 Inspection conditions
4.3.1 Normal test atmospheric conditions
Unless otherwise specified, all inspections in this specification shall be carried out under the following normal test conditions: a. Ambient temperature: 15~～35 *C;
b. Relative humidity: 20%~80%:
c. Atmospheric pressure: the air pressure of the test site.
4.3.2 Environmental conditions
In addition to meeting normal atmospheric conditions, environmental conditions for electrical performance testing also require measures to prevent surrounding electromagnetic interference: so as not to affect measurement accuracy. The power supply voltage and frequency at the testing location should meet the working requirements of all test equipment and instruments. The electrical performance measurement of the receiver must be carried out in a shielded room, and the shielded room's ability to suppress electric fields should be higher than 80dB.
4.3.3 Test equipment, instruments and meters and equipment, instruments and meters that require manual inspection shall all have metrological certificates and comply with the requirements of Appendix A (Supplement) in GJB238A.
4.4 Defect classification
The defect classification principles shall be in accordance with the provisions of GJB179A
The defect classification of radio stations is shown in Appendix A (Supplement). 4.5 Appraisal inspection
Appraisal inspection is generally carried out when the radio station is designed and finalized for production. However, when there are major changes in the main design, process, components and materials of the radio station that affect the important performance of the radio station and make the original appraisal conclusion no longer valid, an 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. 4.5.1 Appraisal inspection items
The appraisal inspection items shall be carried out in accordance with the provisions of Table 2.
4.5.2 Sampling Scheme
The quality inspection department shall randomly select at least 34 samples from the submitted batch of products for the identification inspection, and conduct normal temperature inspection. After passing the inspection, environmental testing shall be carried out.
4.5.3 Qualification Criteria
When all inspection items meet the requirements of Chapter 3 and Chapter 5, the identification inspection is considered to be qualified. If any- 7
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one inspection item does 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, and then continue the inspection from that item or related items. If all inspection items meet the specified requirements, the identification inspection is still considered to be qualified: if there is still an item that does not meet the specified requirements after the inspection is continued, the identification inspection is considered to be unqualified. 4.5.4 Maintaining Qualification for Identification and Inspection
To maintain qualification for identification and inspection, the measures to be taken should be specified in the product specifications and test data should be submitted regularly (including the frequency of submission).
Inspection Items
Appearance Quality
Mark and Code
Safety
Maintainability
Interchangeability
Frequency Range
Channel Interval
Frequency Error
Power Supply Voltage
RF Termination and Impedance
Audio Interface and Impedance
Transmit and Receive Conversion Time
Consistency Inspection
Technical RequirementsbZxz.net
Chapter and Article Number
Test Method
Chapter and Article Number
Inspection Items
Sensitivity
Quiet Noise Sensitivity
Audio Output
Audio Harmonic Distortion Coefficient
Maximum Audio Output Signal-to-Noise Ratio||tt| |Suppression characteristics
IF selectivity
IF suppression ratio
Image frequency suppression
Intermodulation immunity
Pilot tone attenuation
Audio noise
Noise control signal output
Self-combined interference point
DC power consumption
Conducted spurious emission component
Carrier power
Spurious emission distribution
Output circuit protection
Pilot tone frequency
Pilot frequency deviation
Modulation limit
Suppression sensitivity
Modulation characteristics
Audio harmonic distortion coefficient
Residual FM
Frequency lock time
DC power consumption
sJ 20692--1998
Continued Table 2
Quality consistency inspection
Technical requirements
Chapter, Article No.
3.12.2.10
3.12.2.11
3.12.2.12
3.12.2.13
3.12.2.14
3.12.2.[4
3.12.2.16
3.12.3.10
3.12.3.11
3.12.3.12
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Test method
Chapter, Article No.
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