Moreover, in sweeping the spectrum, the spectrum analyzer too frequently missed brief transients. Oscilloscopes, working in the Math>FFT mode, have always had a slower sample speed, and creating a time-domain display in a spectrum analyzer, while feasible does not provide the user with the processing and memory features available in a contemporary digital oscilloscope. But this overlapping tendency is far from absolute. More recently, each instrument has become competent in the other’s territory. Traditionally, only the spectrum analyzer was capable of displaying electrical and electromagnetic signals in the frequency domain and the oscilloscope took control of the time domain.
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