This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of system output ports (hereinafter referred to as components) in cable distribution systems for television and sound signals from 5MHZ to 1750MHz. This standard applies to system output ports in cable distribution systems for television and sound signals from 5MHZ to 1750MHz. GB/T 11318.12-1996 Cable distribution system equipment and components for television and sound signals Part 12: General specification for system output ports GB/T11318.12-1996 Standard download decompression password: www.bzxz.net

1 Scope
National Standard of the People's Republic of China
Equipment and components used in cabled distribution systems primarily intended for television and sound signals
Part 12: Generic specifications for system outlets GB/T 11318. 12—1996
Replaces GB/T14948.2--1994
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of system outlets (hereinafter referred to as components) in cabled distribution systems for television and sound signals of 5MHz to 1750MHz. This standard applies to system outlets in cabled distribution systems for television and sound signals of 5MHz to 1750MHz. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T6510-1996 Cable distribution system for television and sound signals GB7393-87 Basic dimensions of output ports of cable distribution system for sound and television signals GB9025-88 Mechanical and electrical matching values ​​of cable distribution system for 30MHz~1GHz sound and television signals GB/T11318.1-1996 Cable distribution system for television and sound signals Equipment and components Part 1: General specifications 3 Product classification
According to the number of output ports and corresponding uses, it is divided into single output port (TV) and double output port (TV and FM). According to the working mode, it is divided into terminal type and series type (series unit). According to the circuit program, it is divided into filter type and broadband transmission line transformer type. 4 Basic dimensions and mechanical matching requirements
The basic dimensions of the components shall comply with the provisions of GB/T7393. The socket form of the components shall comply with the provisions of 3.3.2 in GB902588.
5 Requirements
5.1 General requirements
The general requirements of the components shall comply with the provisions of 4.1.1 of GB/T11318.1-1996. 5.2 Performance parameters
Approved by the State Administration of Technical Supervision on September 9, 1996 400
Implementation on May 1, 1997
GB/T 11318.12-1996
The performance parameter requirements for the output ports of terminal and serial systems are shown in Table 1 and Table 2 respectively. Table 1 Performance parameters of the output port of the terminal system
Output attenuation
In-band flatness (TV)
Reflection loss
Mutual isolation
(TV--FM)
VHF, ≤0. 5
UHF:≤1.0
Performance parameters
±1.5 (≤0.5 in each channel)
VHF:≥16
UHF:≥10
Table 2 Performance parameters of serial system output port
Performance parameters
Nominal value
Allowable deviation
Flatness within the band
Mutual isolation
(TV--FM)
Reflection loss
Environmental adaptability
Soil 1.5 (≤0.5 in each channel)
VHF:≥16;UHF:≥10
TV:≤5. 0
FM: Not specified
±1.5 (≤0.5 in each channel)
VHF:≥16
UHF:10
FM:≥10
±1.5 (≤0.5 in each channel)
VHF:≥16;UHF:≥10;FM:≥10
The environmental adaptability requirements of the components shall comply with the provisions of 4.3 of GB/T11318.1-1996. The test items after high temperature, constant humidity, sweep frequency vibration and collision tests are branch loss (series type) or output attenuation (terminal type). After low temperature test and free fall test, the performance test shall be carried out according to the items specified in Table 1 (terminal type) or Table 2 (series type), and the test results shall comply with the relevant provisions in Table 1 or Table 2. 5.4 Reliability
The lower limit of the reliability index mean time between failures (MTBF) of the component shall not be less than 100,000 h6. The failure criterion is the branch loss (series type) or output attenuation (terminal type), and the change range exceeds 3dB and 1.5dB respectively compared with before the test. 5.5 Safety
The safety requirements of the component shall comply with the relevant provisions of Section 9 of GB/T6510-1996. 5.6 Electromagnetic compatibility
The electromagnetic compatibility requirements of the component shall comply with the relevant provisions of 4.6 of GB/T11318.1-1996. 401
6 Test methods
6.1 General requirements
GB/T 11318.12-1996Www.bzxZ.net
The test methods for general requirements of components shall be carried out in accordance with the provisions of 4.1.2 of GB/T11318.1-1996. 6.2 Performance parameters
The performance parameters of the components shall be measured in accordance with the provisions of 4.2.2 of GB/T11318.1-1996. When measuring the mutual isolation between TV and FM, the TV channel should input the signal from the TV port, and the FM band should input the signal from the FM port. 6.3 Environmental adaptability
The environmental adaptability test method of the components shall be carried out in accordance with the relevant provisions of 4.3 of GB/T11318.1--1996. The test temperature group is Group I.
6.4 Reliability test
The reliability test method of the components shall be carried out in accordance with the provisions of 4.4 of GB/T11318.1--1996. The test plan is Plan I. 6.5 Safety
The safety test method of components shall comply with the relevant provisions of Section 9 of GB/T6510-1996, in which the test current for dielectric strength is 10mA, and the test voltage is steadily increased to the specified value within 5s to 10s, maintained for 1min, and then decreased at the same speed. The test shall be conducted between the following endpoints:
a) The inner conductor of the output port and the inner conductor terminal of the input and output coaxial cable; b) The inner conductor of the output port and the outer conductor terminal of the input and output coaxial cable; c) The outer conductor of the output port and the inner conductor terminal of the input and output coaxial cable; d) The outer conductor of the output port and the outer conductor terminal of the input and output coaxial cable. 6.6 Electromagnetic compatibility
The electromagnetic compatibility test method of components shall be carried out in accordance with the relevant provisions of 4.6 of GB/T11318.1-1996. 7 Inspection rules
The inspection rules for components shall comply with the relevant provisions of Chapter 5 of GB/T11318.1-1996. The main electrical performance parameter test items during the delivery inspection are insertion loss, branch loss (series type) or output attenuation (terminal type). 8 Marking, packaging, transportation and storage
The marking, packaging, transportation and storage of components shall comply with the relevant provisions of Chapter 6 of GB/T11318.1-1996. 402
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