怎么使用N9020A Tektronix RSA5103A信号分析仪获取信号频谱？

嗨Serena - 对于N9020A，您将需要使用IQ波形测量并捕获感兴趣信号的IQ数据。
您可以参考以下手册了解详细信息：http：//cp.literature.agilent.com/litweb/pdf/N9060-90029.pdf IQ数据表示I（同相）和q（正交）的值
）时域中IQ平面上的实信号的分量。
其中I * cos（wt）+ jQsin（wt）表示时域信号而Sqrt（I ^ 2 + Q ^ 2）是时域信号的幅度而Arctan（I / Q）是时间的相位
域信号对于特定样本。
Matlab具有复杂的FFT功能，允许复数值作为FFT功能的输入。
您将获得信号的复频域表示作为函数的输出。
您可以将此功能与IFFT功能一起使用，以便在时域中恢复原始实信号。
有更多雄辩的方法，但这种方法是直观的问候 -



     以下为原文

  Hi Serena -

For the N9020A, you will want to use the IQ Waveform measurement and capture the IQ Data of the signal of interest. You can reference the manual below for the details:

http://cp.literature.agilent.com/litweb/pdf/N9060-90029.pdf

The IQ Data is represents the values of the I (in-phase) and q (quadrature) components of the real signal on the IQ plane in the time domain. 


Where I*cos(wt)+jQsin(wt) is represents the time domain signal

And

Sqrt(I^2+Q^2) is the magnitude of the time domain signal

And

Arctan(I/Q) is the phase of the time domain signal

For a particular sample.

Matlab has an complex FFT function that allows complex values as inputs to the FFT function. You will get the complex frequency domain representation of the signal as an output of the function. You can use this with the IFFT function to get the original real signal back in the time domain. 

There are more eloquent methods, but this approach is intuitive 

Regards -