RIGOL 
User’s Guide for DS1000B Series 
2-19
 
Term Explanations 
FFT Resolution: The FFT resolution is the quotient between sampling rate 
and the number of FFT points. With a fixed FFT points, the lower sampling 
rate, the better the 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.