GB/T 13859-1992
PerforMance andtest methods of 30-channel pulse code modulation drop/insert equipment at 2048kbit/s 2048kbit/s 30路脉码调制分插设备技术要求与测试方法 |
GB/T 4958.15-1992
Methods of measurement for equipment usedin terrestrial radio-relay systems--Part 1:Measurements common to sub-systems and simulated radio-relay systems--Section four--Measurements in the baseband 地面无线电接力系统所用设备的测量方法 第一部分:分系统和仿真无线电接力系统通用的测量 第四节 基带范围的测量 |
GB/T 13714-1992
Fiber optic branching devices--Part 3:Sectional specification--One-to-n wavelength Multiplexer/demultiplexer 纤维光学分路器 第三部分:分规范 1至n个波长复用器/解复用器 (可供认证用) |
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