GB/T 15844.4-1995 Rules for quality assessment of FM radiotelephones for mobile communications
Some standard content:
National Standard of the People's Republic of China
Mobile FM radiotelephone
Quality assessment rules
Quality assessment requlationsfor radio transceiver employing F3E emissionused in the mobile services
1 Subject content and scope of application
GB/T15844.4---1995
This standard specifies the identification inspection and quality consistency inspection of mobile FM radiotelephones. This standard applies to the quality assessment of mobile FM radiotelephones and can be used as a reference for the quality assessment of related ancillary equipment. 2 Reference standards
GB2828 Batch inspection counting sampling procedure and sampling table (applicable to continuous batch inspection) GB2829 Periodic inspection counting sampling procedure and sampling table (applicable to the inspection of production process stability) GB/T15844.1 General technical conditions for mobile communication FM radio telephones GB/T15844.3 Reliability requirements and test methods for mobile communication FM radio telephones 3 Inspection classification
Product quality assessment rules include two types of inspections: identification inspection and quality consistency inspection. 4 Identification inspection
Identification inspection is a series of complete inspections on the appearance, structure, process, electrical performance, safety, environmental adaptability and reliability of several samples of the same model. Its purpose is to determine whether the manufacturer is capable of manufacturing products that meet the requirements of the standard. When the product is designed and finalized, the production is finalized, the main design, process, materials and parts (components) are changed, or the production is resumed after suspension, identification inspection should be carried out.
a. Design finalization inspection is to determine whether the model of FM radio telephone complies with GB/T15844.1 and relevant regulations, and to provide a basis for the approval of the design finalization of the model. b. Production finalization inspection is to determine whether the manufacturer has the ability to produce a certain number of FM radio telephones and comply with GB/T15844.1 and relevant regulations. c. When the main design, process, materials and parts (components) have major changes or the first batch of products resume production after suspension, all affected items or all items should be tested. Only after passing the test, these changes or resumption of production can be recognized.
4.1 Inspection steps
After completing the packaging, appearance structure process, and brief function inspection (referred to as unpacking inspection), the identification inspection of the design finalization and production finalization of the new design or new modified product can be carried out separately. The internal process assembly inspection, safety inspection, general requirements and electrical performance requirements inspection under standard atmospheric test conditions, environmental test and reliability test, etc. The inspection steps are shown in Figure 1. Approved by the State Technical Supervision Bureau on December 13, 1995, and implemented on June 1, 1996. GB/T 15844.4—1995. Inspection of internal assembly process. Safety inspection. Inspection of general requirements and electrical performance requirements under atmospheric test conditions. Environmental test. Reliability test. The detailed items and sequence, technical requirements and test methods of the identification test shall be carried out item by item in accordance with the provisions of Appendix A (Supplement). The identification items of the first batch of products after the modification shall be determined according to the specific situation. Except for the items that are not tested, their sequence, technical requirements and test methods shall be carried out in accordance with Appendix A (Supplement). 4.2 Sampling inspection. All wireless telephones for identification inspection shall be inspected out of the box. Inspection of internal assembly process for 2 sets. Safety inspection for 2 sets.
2 units are inspected for general requirements and electrical performance requirements under standard atmospheric test conditions. Environmental test (except special environmental test) 2 units. The number of samples taken for reliability test and its test method shall comply with GB/T15844.3. 4.3 Qualification judgment of identification test
4.3.1 Qualification judgment of design finalization identification testa. For the inspection items of packaging in design finalization identification, the inspection results shall be recorded after inspection as a basis for improvement, but not as a basis for qualification judgment.
b, appearance structure process, brief function inspection; internal assembly process inspection; general requirements and electrical performance requirements inspection environmental test under standard atmospheric test conditions. After inspection, no A-class unqualified items are allowed in the four major items, and the number of B-class unqualified items is allowed to be no more than · (no unqualified items are allowed for spurious RF components, adjacent channel power, adjacent channel selectivity, spurious response immunity, intermodulation immunity, etc.), and the number of C-class unqualified items is allowed to be no more than 2.
c. All safety inspections shall be qualified.
4.3.2 Production finalization inspection and qualification judgment CB/T15844-4--1995
a: Unpacking inspection (packaging, appearance structure process, brief function inspection), after inspection, no Class A unqualified items are allowed, and the number of Class B unqualified items and Class C unqualified items are allowed to be no more than 1 b. In-machine assembly process inspection; general requirements and electrical performance requirements inspection under standard atmospheric test conditions; environmental test. After the three major inspection items are inspected, no Class A unqualified items are allowed for each major item, and the number of (B+C) unqualified items is allowed to be no more than 1 (the II interference and anti-interference items specified in Article 4.3.1b are not allowed to be unqualified). C. All safety inspection items should be qualified.
d. The MTBF value of the reliability test should meet the requirements. 4.3.3 Qualified inspection and qualification judgment after major changes to the product or when resuming production The qualified inspection and qualification judgment when resuming production shall be in accordance with the provisions of Article 4.3.2. a.
b. For the qualification determination of the product after a major change, the corresponding items specified in Article 4.3.2 shall be inspected according to the specific situation.
Improvement of unqualified items in the identification inspection
In the identification inspection of the test sample, if unqualified items appear, the reasons shall be promptly found out, and after taking improvement measures, the test of the item and related items shall be re-performed until they are qualified.
5 Quality consistency inspection
There are two types of quality consistency inspection: batch inspection and periodic inspection. Quality consistency inspection is based on batch inspection, and samples are periodically taken from the product to determine whether the quality can be guaranteed to be continuously stable during the production process of the product. 5.1 Batch inspection
Batch inspection can be divided into individual inspection and sampling inspection. Individual inspection means that each unit should be inspected according to the specified basic performance requirements. Sampling inspection means that for products that have been inspected one by one, only sampling inspection is required for general or special performance; or a certain number of products are sampled from the products of the inspected batch according to a certain sampling plan for inspection. This standard only specifies the latter sampling requirement, and the product standard shall be responsible for the individual inspection. 5.1.1 Inspection batch
An inspection batch shall consist of products produced continuously on one or several production lines under basically the same conditions. 5.1.2 Inspection steps
In the sampling inspection, unpacking inspection shall be carried out first, and then the in-machine assembly process inspection, safety inspection, general requirements and electrical performance requirements inspection under standard atmospheric test conditions may be carried out respectively. The inspection steps are shown in Figure 2. 221
GB/T15844.4--1995
In-machine assembly process inspection set
Safety inspection
General requirements and electrical performance requirements inspection under standard atmospheric test conditions
Sampling inspection shall be carried out batch by batch. The detailed inspection items and sequence, technical requirements, test methods and non-conforming classification shall be in accordance with the provisions of Appendix A (Supplement). 5.1.3 Qualified quality level
The batches submitted for inspection or to be inspected may submit the inspection batches continuously using the quality information provided by the most recently inspected batches. The inspection is conducted by randomly selecting products from the submitted products. The inspection items and the acceptable quality level (AQI) of the number of unqualified products per 100 units are shown in Table 1. Table 1
Acceptable quality level AQI.
Inspection items
Unpacking inspection
(Packaging, appearance structure
Process, brief functions)
In-machine assembly process inspection
Safety inspection
General requirements and
Electrical performance requirements inspection under standard atmospheric test conditions
5.1.4 Inspection and treatment
Defective products
Defective products
Defective products
All safety checks should be qualified
Inspection level
Special S-1
Special S-1
Special S-2
Sampling frequency plan
GB 2828 Normal
Inspection Single sampling
Or double sampling
According to the unpacking inspection, in-machine assembly process inspection, safety inspection, general requirements of standard atmospheric test conditions and electrical performance requirements, if any item of a tested prototype is found to fail to meet the requirements of Articles 5.1 to 5.4 of GB/T15844.1 in the inspection items, the prototype is considered to fail to meet the requirements. According to the provisions of Appendix A of this standard on the classification of non-conforming products and Articles 2.1.13 to 2.1.15 of GB2828, determine whether this prototype belongs to Class A, B or C non-conforming products. The number of non-conforming products shall meet the respective specified A, B and C qualified product determination numbers, otherwise it shall be judged as non-conforming.
If the inspection batch is qualified, the defective products shall be repaired or removed and submitted. If the continuous batch sampling inspection batch fails, the defective products shall be reworked and repaired or screened out, and then resubmitted for inspection. The determination of the inspection strictness shall be handled in accordance with the transfer rules of Article 14.6.3 of GB2828.
5.2 Cycle inspection
Cycle inspection is an inspection of samples taken from a batch or several batches of continuous production that have passed the batch inspection within a specified period. The contents of cycle inspection include: environmental test and reliability test. An initial inspection shall be carried out before the test and meet the requirements. Cycle inspection environmental test should generally be carried out once a year, and the reliability test cycle is specified by the product standard. 222
5.2.1 Environmental test
5.2.1.1 Inspection steps
GB/T15844.4-1995
Environmental test requirements and test methods shall be in accordance with Appendix A (Supplement). 5.2.1.2 Sampling plan
The sampling plan shall be carried out in accordance with GB2829 counting sampling, and the discrimination level I shall be sub-sampling. For specific provisions, see Table 2. Table 2
Rejection quality level (RQL) and judgment number
Sampling number
n2—3
Rejection
40r°2
5.2.1.3 Inspection and treatment
Rejection
Rejection
Discrimination level
Sampling number plan
GB2829 secondary
Comparison requirements for inspection of the sample, if the rejection is less than or equal to the qualified judgment number, it is judged as qualified, if the rejection is greater than or equal to a.
Rejection number, it is judged as unqualified, delivery should be suspended, reasons analyzed, improvement measures taken, and retesting should be carried out. Faults found during the test can be repaired according to the situation. After repair, continue the test according to the following requirements. b.
The climate test shall be continued from the previous test step where the failure occurred. If readjustment is required when repairing the failure, the test shall be continued.
The mechanical test shall be repeated.
c. The judgment made by the environmental test results is valid for the products continuously produced within the cycle. 5.2.2 Reliability test
5.2.2.1 Inspection steps
The reliability test requirements and test methods shall be inspected in accordance with the provisions of Appendix A. 5.2.2.2 Sampling plan
The sampling of the inspection prototype shall generally be selected from the products valid within the cycle after the environmental test is determined to be qualified. The number of samples shall be in accordance with GB/T15844.3 or other relevant regulations. 5.2.2.3 Inspection and processing
Inspect the prototype against the inspection requirements, calculate the MTBF(O,) value based on the calculated failure coefficient of the total number of cumulative related failures and their failure classifications. If it does not meet the requirements, the delivery should be suspended, the reasons should be analyzed, improvement measures should be taken, and the reliability test should be repeated. b. Failures found during the reliability test should be handled in accordance with the provisions of GB/T15844.3. c. The judgment made by the reliability test results is valid for the products produced continuously within the cycle. 6 Acceptance, rejection and others
6.1 Acceptance
The submitted batch of products should be inspected batch by batch and passed the periodic inspection, and the unqualified products found in the batch should be eliminated or repaired, and the whole batch should be accepted. 6.2 Rejection
After finding out the reasons and taking measures, the rejected products can be resubmitted for inspection. If they are still unqualified after the inspection, they should be stopped and reported to the superior department for processing.
6.3 The prototypes that have passed the environmental test and reliability test can be shipped only after they have been repaired and passed the inspection. 223
Inspection Items
A1 Unpacking Inspection
A1.1 Packaging
A1.1.1 Outer Packaging
The product name, model, and number on the packing box do not match the actual product inside the box
The packing box is seriously damaged
There is no mark on the packing box
The factory date,
weight (kg) mark, etc. on the packing box are incomplete or misprinted
A1. 1.2 Inner Packing
The quantity of products in the box (including main
accessories) is short
The box lacks padding
Foreign objects or dirt in the box
No certificate
Instructions and other documents are incomplete or
Not in accordance with the product
Appearance, structure and process
A1.2.1 Appearance of the casing
No factory name or trademark
Other marks are incomplete
GB/T 15844.4—1995
Appendix A
Inspection items and non-conforming classification table
(Supplement)
Quality consistency inspection
Identification inspection
Batch inspection
Individual inspection
Sampling inspection
Periodic inspection
Non-conforming
Technical requirements
and test methods
GB/T 15841. 1
Chapter 8
GB/T 15844.1
Article 5.3
Inspection items
Severe cracking, severe deformation
Severe damage, severe paint peeling
or severe rust
Obvious mismatch or unevenness in the casing joints
General scratches
, rust spots, paint peeling and blistering,
uneven color or unclean casing surface
Loose or missing casing assembly
Fasteners (including loose battery box)
Overall dimensions
Missing or broken, cannot be Serious looseness or overtightening of knobs, switches or buttons, damage or malfunction, serious slippage during adjustment, looseness or mechanical friction sound during adjustment, unclear shifting or positioning of channel switches or function switches A1.2.4 Plug sockets or jacks Any external plug or jack malfunctions or sometimes functions Any external plug or jack is loose but does not affect work A1.2.5 Indicators and displays GB/T 15844.4—1995
Continued Table A1
Quality consistency inspection
Identification inspection
Batch inspection
Periodic inspection
Inspection by unit Sampling inspection
Unqualified
Technical requirements
And test methods
Inspection items
Any function indicator light is off, the display cannot work
A1.2.6 Brief function check
No modulated RF signal output by the transmitter
No audio signal output by the receiver
Noise squelch control failure
Volume control failure or adjustment
Noise is too loud
Inspection of assembly process inside the machine
Broken printed circuit board
Broken or damaged components
Desoldering or broken connecting wires
Wire scratched or exposed, printed
Wire short circuit or damage
Metallic foreign matter inside the machine
Serious rust on metal components inside the machine
Loose components inside the machine
Unsatisfactory welding quality
Non-metallic foreign matter inside the machine
A3 safety inspection
Safety sign
Fuse
Grounding safety
GB/T 15844.4-1995
Continued Table A1
Quality consistency inspection
Identification inspection
Batch inspection
Individual inspection Sampling inspection
Periodic inspection
Non-conformance
Technical requirements
and test methods
GB/T 15844. 1
Article 5.4, 6.2
Inspection items
Abnormal power supply procedure safety
Low voltage power supply hazard short circuit safety
Shell (including heat dissipation part) The temperature rise of the touchable part is not higher than
For wireless
telephones powered by AC mains, the insulation resistance after the tidal heat test is not less than
h The dielectric strength is greater than 1500
V (AC effective value), the leakage
current is not greater than 10mA, and the
test voltage lasts for 1min
Mains power supply Power cord damaged, exposed metal, power plug damaged, loose or live parts accessible A4 General requirements and electrical performance requirements under standard atmospheric test conditions General requirements Type of wireless telephone Working mode Frequency range Number of channels Channel spacing Standard test voltage Maximum working voltage performance Minimum working voltage performance Standard working cycle days GB/T 15844.4--1995
Continued Table A1
Quality consistency inspection
Identification inspection
Batch inspection
Sampling inspection
Individual inspection
Periodic inspection
Unqualified
Technical requirements
And test methods
GB/T 15844.1
Article 5.1
Test items
Continuous transmission capability
Antenna port open circuit and short circuit protection capability
Electrical performance requirements
Transmitter
Carrier frequency tolerance
Carrier power
Strong RF component
Adjacent channel power
Transmitter overall efficiency
Modulation characteristics (relative to
6 dB/octave, with
deviation of the emphasis characteristic)
Transmitter frequency deviation at high modulation frequency
Modulation sensitivity
Audio distortion
Relative audio intermodulation product level
Modulation limit
Residual FM
Residual AM
Transmitter turn-on time
Receiver
Reference sensitivity
Noise suppression sensitivity
GB/T 15844.4-1995
Continued Table A1
Quality consistency inspection
Identification inspection
Threshold squelch opening sensitivity
Deep squelch sensitivity
Deep squelch blocking threshold
f. Squelch opening delay
Batch inspection
Individual inspection Sampling inspection
Periodic inspection
Unqualified
Technical requirements
and test methods
GB/T 15844. 1
Article 5.2.6.1
Test items
Noise squelch lock delay
Noise squelch detuning threshold
Rated audio output power
Rated audio output power
Audio distortion
Audio response
Signal to residual output power
Available frequency bandwidth
Modulation reception bandwidth
Co-channel suppression ratio
Adjacent channel selectivity||tt| |Spurious response immunity
Intermodulation immunity
Audio sensitivity
Receive limiting characteristics
Duplex sensitivity
Receive standby current
A5 environmental test
Low temperature test
High temperature test
Shock test
Free drop test
Vibration (sinusoidal) test
Steady-state damp heat test
Special test
GB/T 15844.4 --- 1995
Continued Table A1
Quality - Conformity Inspection
Qualification Inspection
Batch Inspection
Individual Inspection
Sampling Inspection
Periodic Inspection
Non-conformance
Technical Requirements
and Test Methods,
G3/T 15844.1
Article 5.5, 6.3
Inspection Items
A6 Reliability Test
GB/T15844.4—1995
Continued Table A1
Quality Consistency Test
Identification Test
Batch Test
Individual Test
Sampling Test
Periodic Test
Note: The symbol "" indicates the required test, and the symbol "○\ indicates that the product standard specifies the unqualified test according to the requirements
②Reliability test for identification test, which is necessary for production finalization, and other identification tests are specified by product standards. Additional Notes:
This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Research Institute of the Ministry of Electronics Industry. This standard was drafted by the Seventh Research Institute of the Ministry of Electronics Industry. The main drafter of this standard is Hu Liushun.
Technical requirements
and test methods
GB/T 15844. 1
Article 5.66.44-1995
Continued Table A1
Quality consistency inspection
Identification inspection
Threshold squelch opening sensitivity
Deep squelch sensitivity
Deep squelch blocking threshold
f. Squelch opening delay
Batch inspection
Individual inspection Sampling inspection
Periodic inspection
Unqualified
Technical requirements
and test methods
GB/T 15844. 1
Article 5.2.6.1
Test items
Noise squelch lock delay
Noise squelch detuning threshold
Rated audio output power
Rated audio output power
Audio distortion
Audio response
Signal to residual output power
Available frequency bandwidth
Modulation reception bandwidth
Co-channel suppression ratio
Adjacent channel selectivity||tt| |Spurious response immunity
Intermodulation immunity
Audio sensitivity
Receive limiting characteristics
Duplex sensitivity
Receive standby current
A5 environmental test
Low temperature test
High temperature test
Shock test
Free drop test
Vibration (sinusoidal) test
Steady-state damp heat test
Special test
GB/T 15844.4 --- 1995
Continued Table A1
Quality - Conformity Inspection
Qualification Inspection
Batch Inspection
Individual Inspection
Sampling Inspection
Periodic Inspection
Non-conformance
Technical Requirements
and Test Methods,
G3/T 15844.1
Article 5.5, 6.3
Inspection Items
A6 Reliability Test
GB/T15844.4—1995
Continued Table A1
Quality Consistency Test
Identification Test
Batch Test
Individual Test
Sampling Test
Periodic Test
Note: The symbol "" indicates the required test, and the symbol "○\ indicates that the product standard specifies the unqualified test according to the requirements
②Reliability test for identification test, which is necessary for production finalization, and other identification tests are specified by product standards. Additional Notes:
This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Research Institute of the Ministry of Electronics Industry. This standard was drafted by the Seventh Research Institute of the Ministry of Electronics Industry. The main drafter of this standard is Hu Liushun.
Technical requirements
and test methods
GB/T 15844. 1
Article 5.66.44-1995
Continued Table A1
Quality consistency inspection
Identification inspection
Threshold squelch opening sensitivity
Deep squelch sensitivity
Deep squelch blocking threshold
f. Squelch opening delay
Batch inspection
Individual inspection Sampling inspection
Periodic inspection
Unqualified
Technical requirements
and test methods
GB/T 15844. 1
Article 5.2.6.1
Test items
Noise squelch lock delay
Noise squelch detuning threshold
Rated audio output power
Rated audio output power
Audio distortionwwW.bzxz.Net
Audio response
Signal to residual output power
Available frequency bandwidth
Modulation reception bandwidth
Co-channel suppression ratio
Adjacent channel selectivity||tt| |Spurious response immunity
Intermodulation immunity
Audio sensitivity
Receive limiting characteristics
Duplex sensitivity
Receive standby current
A5 environmental test
Low temperature test
High temperature test
Shock test
Free drop test
Vibration (sinusoidal) test
Steady-state damp heat test
Special test
GB/T 15844.4 --- 1995
Continued Table A1
Quality - Conformity Inspection
Qualification Inspection
Batch Inspection
Individual Inspection
Sampling Inspection
Periodic Inspection
Non-conformance
Technical Requirements
and Test Methods,
G3/T 15844.1
Article 5.5, 6.3
Inspection Items
A6 Reliability Test
GB/T15844.4—1995
Continued Table A1
Quality Consistency Test
Identification Test
Batch Test
Individual Test
Sampling Test
Periodic Test
Note: The symbol "" indicates the required test, and the symbol "○\ indicates that the product standard specifies the unqualified test according to the requirements
②Reliability test for identification test, which is necessary for production finalization, and other identification tests are specified by product standards. Additional Notes:
This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the Standardization Research Institute of the Ministry of Electronics Industry. This standard was drafted by the Seventh Research Institute of the Ministry of Electronics Industry. The main drafter of this standard is Hu Liushun.
Technical requirements
and test methods
GB/T 15844. 1
Article 5.66.4
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