虚拟式扫频／幅仪的设计

虚拟式扫频／幅仪是在扫频／幅技术广泛应用而传统硬件仪器无法满足要求的情况下出现的新仪器，虚拟式扫频／幅仪不仅克服了传统硬件仪器的缺点，而且具有功能强大、体积小和操作简单的优点，使测量分析快速、准确和简便，介绍了扫频／幅仪的工作原理、性能指标和工作方式。结合虚拟仪器技术，从硬件模块、软件模块，仪器面板3个方面详细说明了虚拟式扫频／幅仪的设计思想和实现方法。最后给出了虚拟式扫频／幅仪的两个工程应用实例，该仪器在已用于实际的项目中，具有良好的使用价值。

Design of the Virtual Instrument of Frequency/Amplitude Sweep

The virtual F/A sweep instrument appears as a new instrument when the F/A weep technology using widely but the traditional hardware-oriented F/A sweep instrument couldn't meet the demand. The instrument not only overcomes the shortcomings of the traditional hardware instrument, but also have the advantages of powerful functions, small solidity and easy operation, which make test accurately, fast and simply. This paper introduces the principle, features and operating method of F/A sweep instrument. The designing idea and realizing methods of the virtual F/A sweep instrument are discussed in detail from 3 ways, which include hardware, software and panel. Two applied examples of virtual F/A sweep instrument are given. The virtual F/A sweep instrument has already been used in actual applications.