This standard specifies the technical requirements and measurement methods for optical workstations in cable television systems. Any equivalent measurement method that can ensure the same measurement uncertainty can also be used. In case of dispute, this standard shall prevail. This standard is applicable to the development, production, use, and operation maintenance of optical workstations in cable television systems. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. G5465.2-1985 Graphical Symbols for Electrical Equipment GB/T 11318.1-1996 Equipment and Components of Cable Distribution Systems for Television and Sound Signals - Part 1: General Specification GY/T 143-2000 Technical Conditions and Measurement Methods for Network Access of Amplitude Modulation Optical Transmitters and Receivers in Cable Television Systems. The following terms and definitions apply to this standard. 3.1 Uplink optical transmitter Return opt i cal t ans mi t er An optical transmitter that sends uplink transmission signals. 3.2 Optical receiver for downlink transmission signals. 3.3 Uplink optical receiver r et ur n opt i cal receiver An optical receiver that receives uplink transmission signals. 3.4 Optical workstation is a transmission device with functions such as downlink optical receiver and uplink optical transmitter