文中介绍了U SB技术运用于虚拟频谱分析仪的总体设计，重点讨论了USB接口的设计方法。
The whole system design using USB technology to virtual frequence analyzer is introduced, the USB interface design method is discussed particularly.
系统软件使用虚拟仪器技术，设计了通用数据记录仪、浪涌分析仪、频谱分析仪、稳态和瞬态信号分析仪等多种虚拟仪器。
Virtual Instrument technology is used in the design of the general wave recorder, impact analyzer, spectrum analyzer, stable and transient signal analyzer and so on.
利用pc机强大灵活的数据处理及编程能力，构造了语音频谱分析仪的虚拟面板和显示视窗。
The virtual panel and display window of the digital voice signal spectrometer is built up by using the flexible data processing function and powerful programmability of PC.
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