XDSL信号测试专用虚拟频谱仪的设计

功率谱密度是通信信号非常重要的参数，所以在通信的各个阶段都需要对功率谱密度进行测量。在接入网产品的开发中，有多个产品要同时进行开发，因此需要多台频谱分析仪。然而，频谱分析仪属于贵重仪器，配备多台频谱分析仪将导致开发成本增加。虚拟仪器的出现解决了这一问题。这里给出了XDSL接入产品测试专用的虚拟频谱分析仪设计的方法，实践表明，它具有功能齐全价格低廉的优势，作为传统频谱分析仪的替代，虚拟频谱分析仪能够极大的降低仪器的投资。

The Design of Virtual Instrument for XDSL Signal Testing

PSD is a very important parameter in communication; it should be measured in all the phase during communication. Since products are developed at the same time, many spectrum analyzers are needed, which will increases the cost. The appearance of the virtual instrument solves this problem. This paper expatiates on a way the design of virtual instrument designed for XDSL signal. It shows that virtual instrument has an advantage of low price and better functions. As a substitute for traditional instrument, the virtual instrument can greatly reduce the cost of development.