2641: Difference between revisions

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It allows one to focus up to 1600 spectral line with a span as small as 10 Hz about the frequency of interest.
It allows one to focus up to 1600 spectral line with a span as small as 10 Hz about the frequency of interest.


'''[[wikipedia:Fast_Fourier_transform|Fast Fourier transform]]''' (FFT) is an algorithm that computes
To learn more about FFT read '''[[wikipedia:Fast_Fourier_transform|Fast Fourier transform]]''' on at https://en.wikipedia.org/wiki/Fast_Fourier_transform.
the [[wikipedia:Discrete_Fourier_transform|discrete Fourier transform]] (DFT) of a sequence, or its inverse (IDFT).
[[Wikipedia:Fourier_analysis|Fourier analysis]] converts a signal from its original domain (often time or space)
to a representation in the [[Wikipedia:Frequency_domain|frequency domain]] and vice versa.
 
[[File:FFT_of_Cosine_Summation_Function.png|center|500px|Fourier analysis]]


Front panel inputs/outputs are: CH1, CH2, CH3, and CH4 each with a [[BNC connector]] (1 MΩ; 200 pF; ±30 V);  
Front panel inputs/outputs are: CH1, CH2, CH3, and CH4 each with a [[BNC connector]] (1 MΩ; 200 pF; ±30 V);  
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