GB/T 13858.1-1992 Specification for colour TV modulation and demodulation equipment(1TV+4sound program)used in middle distance terrestrial analog radio-relay systems

GB/T 13858.2-1992 Specification for 300 telephone channels modulation and demodulation equipment used in middle distance terrestrial analog radio-relay systems

GB 9408 GB/T 2789-1981 Technical requirements for network interface for the analogue microwave relay communication systems GB/T 6662-1986 Methods of measurement for equipment used in terrestrial radio-relay systems—Part 1:Measurements common to sub-systems and simulated systems—Section three—Measurements in the intermediate-frequency range GB/T 2423.1-2001 Environmental testing for electric and electronic products—Part 2:—Test methods Tests A:Cold GB/T 2423.1-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Tests A:Cold GB/T 2423.2-2001 Environmental testing for electric and electronic products—Part 2:Test methods-Tests B:Dry heat GB/T 2423.2-2008 Environmental testing for electric and electronic products—Part 2:Test methods—Tests B:Dry heat GB/T 2423.3-1993 Basic environmental testing procedures for electric and electronic products—Test Ca:Damp heat, steady state GB/T 2423.3-2006 Environmental testing for electric and electronic products—Part 2:Testing method—Test Cab:Damp heat, steady state GB/T 2423.3-2016 Environmental testing—Part 2:Testing method—Test Cab:Damp heat,steady state GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB/T 3873-1983 General specifications for products packaging of communication equipments GB/T 3659-1983 Methods of measurement of television video channel GB/T 5438-1985 Characteristics and measuring methods for monophonic and stereophonic transmissions GB/T 191-2025 Graphical symbols marking for handling and storage of packages