GB/T 4574-1984 in English
ABOLISHEDMeasuring methods for actual circuit noise and the circuit noise in simulating system loading over the analogue communication network
- Issued on:1984-07-17
- Implemented on:1985-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$330.00
《GB/T 4574-1984模拟通信网中实际电路噪声与模拟系统负荷的电路噪声测试方法》由339-2（工业和信息化部（通信））归口，主管部门为工业和信息化部（通信）。
本标准提出两种噪声测试方法。第一种方法适用于测量模拟通信网中的实际电路噪声，同时可供维护测试使用。第二种方法提出用白噪声模拟系统负荷来测量通信网中由频分多路复用系统组成的电路、基群段和超群段由本系统所产生的噪声，适宜 和于验收测试和质量检查。
Scope
This standard proposes two noise test methods. The first method is suitable for measuring actual circuit noise in an analog communication network and can also be used for maintenance testing. The second method proposes to use white noise to simulate the system load to measure the noise generated by the system in the circuit, basic group section and supergroup section composed of frequency division multiplexing system in the communication network, which is suitable for acceptance test and quality inspection.
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