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一个在时域中看起来非常复杂的信号在频域中表现得却完全不同。 时域测量结果显示的是一个不纯净的正弦波。 如果不进行频域测量，那么我们还是无法知道其二次谐波的来源和频率。 频谱分析可以单独显示频谱分量，从而揭示干扰的来源。 时域提供的信息（如信号脉冲的上升时间和下降时间）固然很重要，但频域使您能够确定信号的谐波内容，如带外发射和失真。 如欲了解更多信息，请阅读此篇博客文章：频谱分析基础知识第 1 部分——什么是频谱分析仪？
This article will detail the basics of a clamp meter and the principles of measurement. When it comes to instruments that measure current, many people may think of analog or digital multimeters. However, if you want to make measurements without breaking the circuit, a clamp meter is recommended. Direct wiring method ...
View Full VersionSpectrum analyzers measure the amplitude of an input signal versus frequency over the entire frequency range to determine the power of the signal. Spectrum analyzers are capable of performing tests such as noise figure and signal-to-noise ratio (SNR) to characterize the performance of a device and its contribution to overall system performance. For more information, see the application guide Spectrum Analysis Basics. ,
View Full VersionSpectrum analyzers are primarily used to measure the amplitude of an input signal in relation to its frequency. A signal analyzer, on the other hand, measures both the amplitude and phase of an input signal at a single frequency. For more information, see the technical overview Spectrum Analyzers and Signal Analyzers. ,
View Full VersionThe selection criteria for a VNA depends heavily on the application or usage scenario. Typically, selection criteria include frequency range, number of ports required (from 2 to 24 (multiport) and even 48 (with switching matrix)), output power, and instrument class from economy to handheld to high-end. Vector network analyzers are both signal generators and receivers...
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