Rigol DS1000E series Guia do Utilizador descarregar pdf (Página 41)

RIGOL

User’s Guide for DS1000E, DS1000D Series

2-13

Key points:

FFT Resolution: the quotient between sampling rate and number of FFT

points. With a fixed FFT points, the lower sampling rate results in better

resolution.

Nyquist Frequency

The highest frequency that any real-time digitizing oscilloscope can acquire

without aliasing. It’s normally half of the sample rate. This frequency is called

the Nyquist frequency. Frequency above the Nyquist frequency will be under

sampled, causing a situation known as aliasing.

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Rigol DS1000E series Guia do Utilizador Página 41