GB/T 13704-1992 General technical requirements for marine broadcasting systems
Some standard content:
UDC 629. 12. 01B. 7
National Standard of the People's Republic of China
GB/T 13704—92
General specification for
shiphoard broadcasting system1992-09-30PromulgatedwwW.bzxz.Net
State Bureau of Technical Supervision
Implementation on 1993-06-01
W.National Standard of the People's Republic of China
General specification for shiphoard broadcasting system
General specification for shiphoard broadcasting system
1 Subject content and scope of application
GB/T 1370A
This standard defines the relevant terminology, main technical requirements, test methods, inspection rules and marking, installation and transportation of shiphoard broadcasting system. This standard shall apply to all requirements hereof. Special equipment for onboard communication, broadcasting and radio relay on various ships. 2 Reference standards
Packaging, storage and transportation pictorial marking
GB1983 Measurement methods for basic parameters of audio power amplifiers (amplifiers) Measurement methods for tape recorders
GH2018
Basic parameters and technical requirements for tape recordersGB2019
GB 2423.1
Basic environmental test procedures for electrical and electronic products Test A, low temperature test method
Basic environmental test procedures for electrical and electronic products Test 3; high temperature test method
GB 2423.2
Basic environmental test procedures for electrical and electronic products Test (a: steady state damp heat test method
GB 2423.4
Basic environmental enhancement procedures for electrical and electronic products Test Dh: alternating condensation potential test method
GR 2423.5
GB 2423. 6
Basic environmental test procedures for electrical and electronic products Basic environmental test procedures for electrical and electronic products GB2423.10
GB2423.16
GB 2423. 17
GB 2423. 31
GB2846
G 3873
GB6163
GB8898
GR9193
GB9374
Basic environmental test procedures for electrical and electronic products Basic environmental test procedures for electrical and electronic products Test methods for radio and television receivers
General technical parts for packaging of communication equipment
Test methods for radio and television receivers| |tt||Test Fa: Impact test method
Test Fh: Collision test method
Test Fc: Vibration (stop) test method
Test: Long-distance test method
Test Ka: Salt spray test method
Slant swing test method
Also safety requirements for equipment related to this type of general purpose Ship optical alarm and dynamic identification mark
Basic parameters of broadcast receivers
GH 10250
Electrical compatibility of electrical and electronic equipment on board ships
3 Terms
3.1 Broadcast system
refers to a complete set of equipment consisting of an input junction box, an output junction box, a broadcast host, a transmitter and receiver, a remote control box and a speaker group. Approved by the State Bureau of Technical Supervision on September 30, 1992 and implemented on June 1, 1993
W.3.2 Input junction boxGB/T 13704—92
refers to a special interface for connecting the broadcast system with the ship's internal communication system. 3.3 Output junction boxrefers to a special interface for connecting the broadcast system with a speaker group. 4 Main technical requirements 4.1 Radio part 4.1.1 Frequency range Medium wave (MW) 526.5~1 606.5 kHz Short wave (SW) 23~26.1MHz Frequency modulation (FM) 87-108 MHz. 4.1.2 Medium frequency frequency Amplitude modulation 465±5kHz Amplitude modulation 10.7+0.3MHz. 4.1.3 Noise limited sensitivity 4. 1. 3. 1 The sensitivity of the AM system should not be less than 300μV for AM and should not be less than 15rV for short wave. 4.1.3.2 FM
Should not be greater than 20 μV.
4.1.4 Selectivity
a. For AM, the single signal selectivity should not be worse than 20 dB: b. For FM, the dual signal selectivity should not be worse than 6 dB. 4.1.5 Image Rejection
For AM, the medium wave should not be less than 20 dB; the short wave should not be less than 6 dB. 4.1.6 Signal-to-Noise Ratio
For AM (A-weighted), it should not be less than 40 dB; for A-weighted (unweighted), it should not be less than 46 dB. 4.1.7 Frequency Characteristics
For AM, the measurement frequency is 1 MHz, and the modulation frequency is 160~3 T50 IIz. For the lower root frequency, the voltage drop relative to 1 kHz should not be less than 6 dB, and for the upper limit frequency, it should not be greater than 12 dB. For T-FM system, the measurement frequency is 0.8MHz, the modulation frequency is 160~50G0Hz, and the voltage drop relative to 1kHz should not be greater than GdB.
4.1.8 Harmonic distortion
For AM system, the voltage should not be greater than 10 yuan, and for FM system, the voltage should not be greater than 7%. 4.1.9 Line
The antenna used in the radio part is a variety of shaped antennas or inverted L antennas, and the antenna input circuit should have a protection circuit. 4.2 Recording and playback part
4.2.1 Mechanical properties
4.2. 1. 1 The tape speed is 4. 76 cm/s, and the tolerance is not greater than +2.5%. 4. 2. 1. 2 Jitter rate, not greater than 0. 4%. 4.2-2 Electrical performance
4.2.2.1 Full channel frequency response tolerance
W.bzsoso: comGB/T'13704--92
When the frequency band is 125~80mn Hz, it should meet the requirements of Figure 1. Hd
Figure 1 Full channel frequency response tolerance
4.2.2.2 Full channel harmonic distortion should not be greater than 2 dB. 4.2.2.3 Full channel signal-to-noise ratio should not be less than 40dB. 4.3 Sound amplification part
4.3.1 The nominal rated output power is 25W, 50W, 100W, 200W (can also be specified by product technical conditions), and the nominal rated output voltage is 60V at 25W or 50W; 120V at 100W or 200W. 4.3.2
The harmonic magnitude (at 1000Hz) should be less than 7% when the nominal rated output power is 25W or 50W, and less than 10% when the nominal rated output power is 1004.3.3
W or 200W.
The frequency of the whole machine (80~8000Ha) should be within 2dB. The signal-to-noise ratio should not be less than and dB.
The output voltage regulation rate requires that when the load changes, the voltage rise of the open-circuit output should not exceed 4dB; when it drops to 80% of the rated load, the voltage rise should not exceed 3dB.
4.3.7 The input signal level at the nominal rated output power is 12V and the rise is not more than 150μV. 4.3.8 The amplifiers of 50W and above 50W shall be equipped with output non-dynamic rate indicator devices.4.3.9 The amplifiers of 50W and above 50W using semiconductor tubes at the final stage shall have reliable protection measures to ensure that they will not be damaged when the load is short-circuited.
4.3.10 The amplifiers shall operate stably and there shall be no obvious audio vibration.4.4 Power supply
4.4.1 AC power supply: 220V.50±2.5Hz (110V, 60+2.5Hz); DC power supply: 24!31V
4.4.2 When the AC power supply voltage changes by 10%, the output power is allowed to change by 20%, and the harmonic distortion shall not be greater than 15%. When the AC power supply voltage changes by 15%, the system shall be able to work.4.4.3 When the AC power supply circuit is closed: the insulation resistance between the power supply line and the shell measured with a 500V transformer should be no less than 10M0. 4.5 Technical requirements for broadcasting system
4.5.1 When the broadcasting machine is at a fixed output, the input voltage series is 60V (25W.50W), 120V (100W, 200W). 4.5.2 The input impedance and input signal of the broadcasting card machine should meet the following requirements; 3
W. Low impedance microphone: 600n/10mV,
High impedance microphone: 60kn/4mV
Pickup:
50 k/150 mv
GB/T 13704--92
4.5.3 The audio signal level supplied by the radio part to the amplification part shall be specified by the product technical conditions. 4.5.4 The technical requirements for the controller and loudspeaker shall be specified in the product technical conditions. 4.5.5 The mobile telephone system or common power system shall be able to start the power supply of the broadcasting system. The input level and micro impedance of the broadcasting system and the telephone system shall be specified in the product technical conditions. 4.5. The broadcasting system shall have the function of being remotely controlled by the internal communication system and can be centrally controlled. It can also be controlled by partitions. The partition requirements shall be specified in the product technical conditions. The remote control function level is higher than the entertainment broadcasting function level. 4.5.7 The broadcasting system shall have a monitoring function. 4.5.81 The broadcasting system shall have an AC/DC power supply automatic conversion function. 4.5.9 The protection type of the shell of the broadcasting system shall be adapted to the place of installation and use. The safety of the broadcasting system shall comply with the provisions of GB8898. 4.5.10 The broadcasting system shall be designed for portability and meet the reliability technical indicators specified in the product technical conditions. 4.5.11
4.5.12) The sound and light signals of the broadcasting system shall comply with the provisions of GB9193. 4.5.13) The broadcasting system shall have good electromagnetic compatibility and shall comply with the provisions of GB10250. 4.6 Environmental adaptability requirements
To ensure the durability of the broadcasting system and the stability of its adaptation to environmental conditions. The broadcasting system shall meet the following environmental conditions. 4.6.1 Ambient temperature
Indoor: -10～+40℃: (for recording part) 10--+ 55'℃:
Outdoor: -25～+60℃.
4.6.2 Mixed heat
Steady damp heat
40℃, relative humidity 93%:
Alternating damp heat
25～10～25℃, relative humidity 95% or
25 ~55 ~25℃, and condensation degree 95%. The test duration shall not be less than 2 days.
4.6.3 Clock strike
For the severity level of the gap value acceleration value and pulse duration, see the table]. 1
Peak acceleration
Speed A
4.6.4 Impact
Pulse duration
Time"
After the peak sawtooth is
The corresponding degree of change
Half sine wave
The severity of the peak acceleration value and pulse duration is shown in Table 2. The number of vertical collisions is not less than 1000 times. Trapezoidal
W. Peak acceleration
Pulse duration:
4.6.5 Tilt and swing
Tilt and swing severity levels are shown in Table 3 and Table 1: Construction form
Swing form
4.6.6 Vibration
Vibration requirements are shown in Table 5
Installation position
Rated frequency, Hz| |tt||Displacement, linear
Acceleration, m/a
GB/T13704-92
Short compliance
Degrees
Shutter angle
Amplitude
2---10
10~-80
Suitable for equipment on board
Equipment on small high-speed ships
Test line interval
Test duration
4.6.7 Exposure duration 28d, the exposure degree should not be inferior to the second level requirements specified in GB2123.16, 4.6.8 Exposure
Metal plated parts exposed to air should meet the requirements of Table 6. Part
W. Ammonium||t t||Nickel alloy
Copper alloy
Copper alloy
And alloy
5 Electrical performance measurement method and system function test method GB/T13704-92
Test time
Qualification requirements
No patina on the surface
No green on the surface
No rust on the surface
No brown rust on the surface
No light green spots on the surface
5.+ The electrical performance of the radio receiving part shall be tested under the test conditions specified in GB9374 according to the corresponding methods specified in GB2846 and 1CB6163.
5.2 The electrical performance of the tape recording part shall be tested according to the corresponding methods specified in GB2018. 5.3 The electrical performance of the amplification part The performance is tested according to the method specified in GB1983. 5.4 The function of the broadcasting system to be remotely controlled by the ship's internal communication system is tested by sending the remote control signal of the internal communication system to the broadcasting system, and the broadcasting system can be controlled and complete the specified functions. 5.5 The monitoring function test method refers to the monitoring function when the radio broadcast or the transmitter is transmitting, which can be used to monitor the size of the broadcasting signal.
5.6 The automatic conversion function test method of AC and DC power supply refers to the automatic transfer to DC 21V power supply when the AC power supply is cut off, and the automatic recovery of AC power supply when the AC power supply is connected. 6 Environmental test methods
6.1 Low temperature test
The test is carried out according to the method specified in GB2423.1, and the relevant test details are specified in the product technical conditions. 6.2 High temperature test
It shall be carried out according to the method specified in GB2423.2. The relevant test details shall be specified in the product technical conditions. 6.3 Condensation heat test
6.3.1 The test is divided into two types: constant mixed heat and alternating damp heat. One can be selected according to the product characteristics. 6.3.2 The constant damp heat test shall be carried out according to the method specified in GB2123.3. The relevant test details shall be specified in the product technical conditions. 6.3.3 The alternating sensible heat test shall be carried out according to the method specified in GB2423.4. The relevant test details shall be specified in the product technical conditions. 6.4 Condensation heat test
It shall be carried out according to the method specified in GB2423.4. The relevant test details shall be specified in the product technical conditions. 6.5 Flame test
Carry out according to the method specified in GB2123.6, and the relevant test details are specified in the product technical conditions. 6.6 Tilt and swing test
Carry out according to the method specified in GB2423.31, and the relevant test details are specified in the product technical conditions. 6.7 Vibration test
Carry out according to the method specified in GB2423.10, and the relevant test details are specified in the product technical conditions. 6.8 Long-term test
W.GB/T 13704-- 92
Should be carried out according to the method specified in GB2423.16. If the manufacturer has a test report on the mildew resistance of the insulation materials and coatings of furniture, the test can be exempted during the validity period of the product type approval. 6-9 Salt spray test
Should be carried out according to the method specified in GB2123.17. If the manufacturer has a qualified salt spray test report for the material, the test can be exempted during the validity period of the product type approval.
6.10 Power supply change test
The power supply change test method is specified by the product technical conditions. 6.11 Electromagnetic compatibility test
Carry out according to the film method specified in GB:0250, and the test details are specified in the product technical system. 6.12 Safety test
Carry out according to the method specified in (B8898.
7 Inspection rules
7. 1 Factory Inspection
Product factory inspection is a test that must be carried out when the product is delivered. All the items specified in the factory inspection must be inspected and qualified before the product can be shipped and a product certificate can be issued. If a certain inspection item of the lead broadcast system equipment is found to be unqualified during the factory inspection, the cause should be analyzed and re-inspected after the defect is eliminated. The product batching and batch sampling methods in the factory inspection and the detailed re-inspection rules shall be determined by the product technical personnel. 7.1.1 Factory Inspection Items
7.1.1.1 General inspection
Inspection contents include appearance, assembly quality, marking, installation dimensions, quality, packaging, accessories and random documents, etc. 7.1.1.2 Power-on operation inspection
All or part of the inspection items are carried out according to the inspection items specified in Articles 4.1 to 1.5 of this standard and the test methods specified in Article 5. 7.1.2 Judgment rules
7.1.2.1 Mechanical parts in the marine transport system have cracks, pressure, peripheral parts have obvious rust, fixed structure assembly is tilted, swinging.The rubber gasket has cracks or wrinkles, the product has residual metal shavings or debris, the outer gauge has obvious scratches, the paint is seriously peeled, there is no mark or the mark is unclear, the installation size is seriously out of tolerance, the packaging does not meet the requirements of this standard, and the accessories do not meet the requirements. All of these are considered unqualified. 7.1.2.2 The convexity judgment of the power-on operation test can be carried out according to the provisions of Articles 1.1 to 4.5 of this standard. Or the product technical conditions are clearly stated. 7.2 Type inspection Type inspection is to verify whether the marine broadcasting system meets all the requirements specified in the technical standards. In small batch production, all test items can be carried out on a product randomly selected in the test. In batch production, the product is corrected and the sample method is used to make the product technical conditions. In any of the following cases, the marine broadcasting system must be inspected for some or all of the type inspection items. Trial and type identification of new products or old products for production; a. After formal production, the suburban structure, materials, and other items must be inspected. When the process has a significant change that may affect the product performance: During normal production, it is a period of time or a certain amount of production. Periodic inspection should be carried out: d. When the product is stopped for a long time and the production is resumed; the factory inspection results are significantly different from the last type inspection; e. When the national quality supervision agency proposes a requirement for type inspection. 7.2.1 Type inspection items All items specified in Articles 1.1 to 4.6 of this standard and the test methods specified in Chapter 5 and Article 6 shall be inspected. 7.2.2 Specific rules During type inspection, the qualification criteria of each test item shall comply with the requirements of Articles 1 to 1.6 of this standard or the provisions of the product technical specifications. Only when all the tests of type inspection items are qualified can it be considered that the type inspection has been carried out. If an item fails in the test, the reason should be analyzed, and a certain measure should be taken to improve it before retesting. When the measures taken affect the indicators of other test items, the affected test items should also be retested. The specific details of the retest are stipulated by the product technical conditions. 8 Markings
A chrome plate mark should be set on the product. The nameplate should be made of corrosion-resistant and flammable materials. The nameplate should have the following content: Product name, model:
brand and trademark:
power type and power consumption:
manufacturing date;
export number:
inspection mark.
9 Packaging, transportation and storage
The packaging of the production system should comply with the provisions of GB3873. The packaging and storage vehicle graphic marks should comply with the regulations of GB191. 9.3 The equipment of the marine broadcasting system should be stored in a ventilated and dry warehouse. 10 Spare parts
The marine broadcasting system shall have enough spare parts, and the quantity and type shall be specified in the product technical conditions or the cargo contract. Additional remarks:
This standard is proposed by China Shipbuilding Industry Corporation. This standard was drafted by the 723rd Research Institute of China Shipbuilding Industry Corporation. This standard was drafted by Wang Yongfang, Xu Xiuguo, Yu Dayong, Liang Jimu, Zhang Guanghui W.
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