GY/T 140-1999.Specifications and methods of measurement on system outlets (5~1000MHz) used for CATV systems. 5.2.2.2测量步骤 a先不接被测部件，直接连通测量系统，调整7频仪的频率范围使

GY/T 142-1999.Technical specifications for VHF and UHF terrestrial television broadcasting monitoring. 1范围 GY/T 142规定了米波(VHF)、分米波(UHF)地面电视广播的测量项目、技术指标

GY/T 137-1999.Specifications and methods of measurement on system outlets (5~ 1000MHz) used for CATV systems. 5.2.2.2测量步骤 a先不接被测部件，直接连通测量系统，调整扫频仪的频率范围

GY/T 138一1999.Specification and methods of measurement on Combiners ( 5~ 1000MHz) used for CATV systems. 4.2.2测量步骤 4.2.2.1接通被测系统。选调制器输出射频信号频率为:700-750

GY/T 138一1999.Specification and methods of measurement on Combiners ( 5~ 1000MHz) used for CATV systems. 4.2.2测量步骤 4.2.2.1接通被测系统。选调制器输出射频信号频率为:700-750

GY/T 138一1999.Specification and methods of measurement on Combiners ( 5~ 1000MHz) used for CATV systems. 4.2.2测量步骤 4.2.2.1接通被测系统。选调制器输出射频信号频率为:700-750

GY/T 138一1999.Specification and methods of measurement on Combiners ( 5~ 1000MHz) used for CATV systems. 4.2.2测量步骤 4.2.2.1接通被测系统。选调制器输出射频信号频率为:700-750

GY/T 138一1999.Specification and methods of measurement on Combiners ( 5~ 1000MHz) used for CATV systems. 4.2.2测量步骤 4.2.2.1接通被测系统。选调制器输出射频信号频率为:700-750

GY/T 138一1999.Specification and methods of measurement on Combiners ( 5~ 1000MHz) used for CATV systems. 4.2.2测量步骤 4.2.2.1接通被测系统。选调制器输出射频信号频率为:700-750

GY/T 138一1999.Specification and methods of measurement on Combiners ( 5~ 1000MHz) used for CATV systems. 4.2.2测量步骤 4.2.2.1接通被测系统。选调制器输出射频信号频率为:700-750