This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of mixers in cable distribution systems for 5MHZ~1750MHz television and sound signals. This standard applies to mixers in cable distribution systems for 5MHZ~1750MHz television and sound signals. GB/T 11318.6-1996 Cable distribution system equipment and components for television and sound signals Part 6: General specification for mixers GB/T11318.6-1996 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 6: Generic specifications for combiners
Equipments and components used in cabled distribution systems primarily intended for television and sound signals Part 6: Generic specifications for combiners GB/T11318.6—1996
This standard specifies the product classification, requirements, test methods, inspection rules, as well as marking, packaging, transportation and storage of combiners in cabled distribution systems for television and sound signals of 5MHz to 1750MHz. This standard applies to combiners 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 by reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards GB/T11318.1-1996 Cable distribution system equipment and components for television and sound signals Part 1: General specifications 3 Product classification
Mixers are divided into filter type and broadband transmission line transformer type according to different circuit programs. The former is further divided into channel mixing and frequency band mixing due to different working bandwidths.
4 Requirements
4.1 General requirements
The general requirements of mixers shall comply with the provisions of 4.1.1 of GB/T11318.1-1996. 4.2 Performance parameters
The performance parameter requirements of mixers are shown in Table 1.
TV channel
Insertion loss
In-band flatness
Approved by the State Administration of Technical Supervision on September 9, 1996 360
Performance parameters
FM band
TV band
±2 (≤0.5 in each channel)
Broadband transformer
Specified by the enterprise standard
Implemented on May 1, 1997
In-band fluctuation
Out-of-band attenuation
Mutual isolation
Reflection loss
GB/T 11318.6—1996
Table 1 (end)bzxz.net
Performance parameters
TV channel
VHF:≥10
UHF:≥7. 5
FM band
TV band
Note: For filter-type mixers with 5-channel and FM band inputs at the same time, the FM band width can be appropriately compressed. 4.3 Environmental adaptability
Broadband transformer
The environmental adaptability requirements of the mixer shall comply with the relevant provisions of 4.3 in GB/T11318.1--1996. The test items after high temperature, constant humidity, sweep frequency vibration, and collision tests are insertion loss. After low temperature tests and free drop tests, performance tests are carried out according to the items specified in Table 1, and the test results shall comply with the relevant provisions of Table 1. 4.4 Reliability
The lower limit value of the reliability index mean time between failures (MTBF) of the mixer shall not be less than 40,000 hours. The failure criteria are insertion loss and out-of-band attenuation (or mutual isolation). Compared with before the test, the change range exceeds ±2dB and ±5dB respectively. 4.5 Electromagnetic compatibility
The electromagnetic compatibility requirements of the mixer shall comply with the relevant provisions of 4.6 of GB/T11318.1-1996. 5 Test methods
5.1 General requirements
The test methods for general requirements of the mixer shall be carried out in accordance with the provisions of 4.1.2 of GB/T11318.1-1996. 5.2 Performance parameters
The performance parameter measurement methods of the mixer shall be carried out in accordance with the relevant provisions of 4.2.2 of GB/T11318.1-1996. 5.3 Environmental adaptability
The environmental adaptability test method of the mixer shall be carried out in accordance with the relevant provisions of 4.3 of GB/T11318.1-1996. The test temperature group is Group 1.
5.4 Reliability
The reliability test method of the mixer shall be carried out in accordance with the provisions of 4.4 of GB/T11318.1-1996. The test plan is Plan I. 5.5 Electromagnetic compatibility
The electromagnetic compatibility test method of the mixer shall be carried out in accordance with the relevant provisions of 4.6 of GB/T11318.1-1996. 6 Inspection rules
The inspection rules of the mixer 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 frequency response (in-band flatness, in-band fluctuation, out-of-band attenuation) and insertion loss. 7 Marking, packaging, transportation and storage
The marking, packaging, transportation and storage of the mixer shall comply with the relevant provisions of Chapter 6 of GB/T11318.1-1996. 361
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