This standard specifies the performance parameter requirements and measurement methods for residual sideband amplitude modulation laser transmitters and receivers in the forward (main) channel of cable television systems. Any equivalent measurement method that can ensure the same accuracy can also be applied, and in case of dispute, the provisions of this standard shall prevail. This standard is applicable to the network access detection of residual sideband amplitude modulation laser transmitters and receivers in the forward (main) channel of cable television systems, and serves as the technical basis for network access evaluation. 2. The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. At the time of publication of this standard, all versions shown are valid. All standards will be revised, and parties adopting this standard should explore the possibility of using the latest versions of the following standards. GB 4728.10-1985 Graphical Symbols for Electrical Diagrams Telecommunications: Graphical Symbols for the Transmission of GB 5465.2-1985 Electrical Equipment GB/T 11318.1-1996 General Specification for Equipment and Components of Cable Distribution Systems for Television and Sound Signals GB/T 6510-1996 Cable Distribution Systems for Television and Sound Signals SJ/T 10663-1995 Cable Distribution Systems for Television and Sound Signals Measurement Methods for Fiber Optic Equipment and Components GY/T 131-1997 Technical Requirements and Requirements for Optical Link Systems in Cable Television Networks The measurement method IEC 60728-6 Cable distribution systems for telecommunications and sound signals 3 defines the following definitions used in this standard. Other definitions should comply with the relevant provisions of GB/T 6510, GB/T 11318, and SJ/T 10663. 3.1 Equipment and components 3.1.1 Optical transmitter OPT I call R ANS MI T ER is a device that converts electrical signals into optical signals. It consists of a light source (such as a laser) and other related components, as well as all components located between coaxial input and optical output connectors
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