Spectrum analyzer for RF engineers should not be unfamiliar, spectrum analyzer is used to analyze the unknown signal frequency components.
1, test PLL phase noise. Test the phase noise using the spectrometer to test, the general resolution bandwidth RBW tune into 100Hz, and then sweep width span set at least 2-5 times the offset frequency.
2, time variation of waveform power. Spectrum analyzer also has the function of test waveform.
3, the frequency response characteristics of the test signal. For example, to test the low-pass filter frequency response, we need to track the source spectrum analyzer.