原则上，UWB可以设计成使用几乎任何一部分的射频频谱。
UWB systems can, in principle, be designed to use nearly any part of the RF spectrum.
不幸的是，来自地球居民而不是外星人的信号挤满了射频频谱的一部分。
Unfortunately, some parts of the radio spectrum are full of signals created by Earthlings, rather than aliens.
结合虚拟仪器的特点，提出并实现了一种虚拟射频频谱仪的方案，着重介绍了其中的中频数字化实现方法。
Combined with the features of virtual instrument, the scheme realizing virtual RF spectrum analyzer is presented and realized in this paper, and digital intermediate frequency method is emphasized.
该8590L是一种成本低，但功能齐全，频率精确的射频频谱分析仪，以满足您的一般目的的测量需求。
The 8590L is a low cost, but full-featured, frequency accurate RF spectrum analyzer designed to meet your general purpose measurement needs.
用射频频谱分析仪观测一个已调波的频谱成分，记录上边带或下边带中各条谱线的幅度值，从而可以根据有关算式计算出调制信号（音频信号）的失真度。
Spectrum of the amplitude-modulated wave is observed by a radio frequency spectrum analyzer and amplitude values of every spectrum are recorded at the upper sideband or lower sideband.
用射频频谱分析仪观测一个已调波的频谱成分，记录上边带或下边带中各条谱线的幅度值，从而可以根据有关算式计算出调制信号（音频信号）的失真度。
Spectrum of the amplitude-modulated wave is observed by a radio frequency spectrum analyzer and amplitude values of every spectrum are recorded at the upper sideband or lower sideband.
应用推荐