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There are two main types of spectrum analyzers: sweep tuning analyzers and real-time analyzers. Modern spectrum analyzers use digital signal processing to provide more measurement capabilities, making it easier for you to interpret your measurements. Whether it's a swept-tuning analyzer or a real-time spectrum analyzer, they both display the change in amplitude with frequency. However, exactly how each analyzer handles...
实时频谱分析仪可以先在时域中收集数据，然后通过快速傅立叶变换（FFT）将其转换为频域数据。 实时频谱分析仪能够迅速捕获瞬态和快速信号。 ,
A signal that looks very complex in the time domain behaves quite differently in the frequency domain. Time domain measurements show an impure sine wave. Without frequency domain measurements, it is still impossible to know the source and frequency of the second harmonic. Spectral analysis can show the spectral components individually, thus revealing the source of the interference. The information provided in the time domain (e.g., the signal pulse on...
We usually use time as a frame of reference, focusing on when certain specific events will occur. This includes electrical events. Oscilloscopes allow you to view the instantaneous value of a particular electrical event (or the voltage value of some other event converted by an appropriate transducer) over time. In other words, we can use an oscilloscope to view the waveform of a signal in the time domain. Fourier theory...
频谱分析仪主要用于测量输入信号的幅度与频率的关系。 信号分析仪则是同时测量输入信号在单个频率上的幅度和相位。 如欲了解更多信息，请参阅技术概述《频谱分析仪和信号分析仪》。 ,
信号分析仪能够测量输入信号在单个频率上的幅度和相位。 信号分析仪将扫频调谐频谱分析仪的超大动态范围与矢量信号分析仪（VSA）的强大功能相结合，能够执行信道内测量，例如需要幅度和相位信息的误差矢量幅度（EVM）测量。 ,
Spectrum 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. ,
There are many brands and types of oscilloscopes on the market and they may look different, but most have the same basic steps. Here is a step-by-step guide on how to use an oscilloscope: ,
An oscilloscope captures and displays signals in the time domain, while a spectrum analyzer captures and displays signals in the frequency domain. Sometimes, oscilloscopes have a built-in spectrum analyzer function to make it easy to analyze signals in both the time and frequency domains. ,
示波器使用探头连接到电路中的测试点，并放大或衰减该点的电压。之后的信号路径取决于示波器，但一般来说，模拟电路会对信号进行调理，模数转换器将其数字化，以便进一步评估、处理和分析。 ,
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