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2.12 FFT Plot (Spectrum Analyser)
Each scope channel can be analysed using a 2048 point Fast Fourier
Transform. The plot will be shown in a scalable window and will
include all channels selected for analysis, in their respective colours.
The lower limit for the dB plot is limited to –54dB. An on-screen
cross-hair type cursor allows you to measure points on the spectrum.
The FFT time data can be “pre-shaped” using various window
functions, available under the MATH tab. There is also a selection
for dB or Linear plot types on the same tab. These settings are
global for all FFTs.
Elan Digital Systems Ltd. 27 USBscope50 USER’S GUIDE Iss5