Browse Standards

50比特/秒数据传输要求

Requirements of data transmission at 50 bit/s

电视中间频率

Intermediate frequencies of television

地面无线电接力系统所用设备的测量方法 第一部分:分系统和仿真系统通用的测量 第一节 总则

Methods of measurement for equipment used in terrestrial radio-relay systems--Part 1:Measurements common to subsystems and simulated systems--Section One--General

广播用立体声录音机

Stereophonic broadcast magnetic recorder

话路传真 (三类机) 传输要求

Document facsimile (group 3) transmission requirement

单声和立体声节目传输特性和测量方法

Characteristics and measuring methods for monophonic and stereophonic transmissions

电话自动交换网用户信号技术指标测试方法

The test methods for the technical specifications of subscriber line signalling for automatic telephone switching network

电话自动交换网铃流和信号音技术指标测试方法

The test methods for the technical specifications of ringing and tone for automatic telephone switchingnetwork

电话自动交换网带内单频脉冲线路信号技术指标测试方法

The test methods for the technical specifications of inband pulsing single frequency line signalling system for automatic telephone switching network

文件传真质量主观评定方法

Method for the subjective assessment of the quality of document facsimile

磁带录音机基本参数和技术要求

Fundamental parameters and technical requirements for audio tape recorders

高保真扬声器系统最低性能要求及测量方法

Minimum performance requirements and methods of measurement for high fidelity loudspeaker systems

声音和电视信号的电缆分配系统输出口基本尺寸

Basic size of outlet of cable distribution systems intended for sound and television signals

在模拟电话电路上开放电报及低速数据的时分复用设备技术要求

Specifications of TDM equipment operating on an analog telephone-type circuit for telegraph and lower-speed data

国家通信网用户电报及低速数据编号

Numbering for telex and low speed data in national communication network

电报用五单位数字保护码

Protected 5-unit numerical code for telegram service

30 MHz～1GHz声音和电视信号的电缆分配系统 机电配接值

Cabled distribution systems primarily intended for sound and television signals operating between30 MHz and 1 GHz--Electrical and mechanical matching values

地面无线电接力系统所用设备的测量方法 第三部分:仿真系统的测量 第三节 黑白和彩色电视传输的测量

Methods of measurement for aquipment used in terrestrial radio-relay systems--Part 3:Simulated systems--Section three--Measurements for mono-chrome and colour television transmission

地面无线电接力系统所用设备的测量方法 第二部分:分系统的测量 第九节 备用通道倒换设备

Methods of measurement for equipment used in terrestrial radio-relay systems--Part 2:Mesurements for sub-systems--Section nine--Stand-by channel switching equipment

地面无线电接力系统所用设备的测量方法 第三部分:仿真系统的测量 第四节 频分复用传输的测量

Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3:Simulated systems--Section four--Measurementsfor f.d.m. transmission