Standard No.:	GB/T 4958.2-1988
English Name:	Methods of measurement for equipment used in terrestrial radio-relay systems-Part 3: Simulated systems-Section Two Measurements in the basehand
Chinese Name:	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 第二节:基带测量
Chinese Classification:	M34    Microwave communication equipment
Professional Classification:	GB    National Standard
ICS Classification:	33.060.30 33.060.30    Radio relay and fixed satellite communications systems 33.060.30
Issued by:	The ministry of post and telecommunications
Issued on:	1988-2-10
Implemented on:	1989-1-1
Status:	abolished
Abolished on:	2017-12-15
Superseding:	SJ/Z 9094.11-1987 Methods of measurement for equipment used in terrestrial radio-relay systems--Part 3: Simulated systems--Section 2: Measurements of baseband
Language:	English
File Format:	PDF
Word Count:	1000 words
Price(USD):	104.00
Delivery:	via email in 1~3 business day

这一节涉及在仿真无线电接力系统基带上，并且与实际传输的特定型式信号（例如：频分复用电话信号和电视信号）不直接相关的一些测量。本标准描述的基带测量，一般是在调制机输入端和解调机输出端进行的测量，不包括附属的终端设备，例如与特定型式基带信号相关的预加重网络和去加重网络。这一节不包括随机噪声、周期性噪声及脉冲噪声测量。因为，这些噪声电平只有通过与它们有关的特定型式基带信号，并且使用相应的去加重网络和加权网络，才可能作出有意义的评价。与频分复用电话、电视及声音节目有关的各项测量，在本系列标准第三部分的相应单节里给出。