Square Root; Frequency Analysis - Teledyne LeCroy T3DSO2000A Series User Manual

19.3.3 Square Root

Square root （√） calculates the square root of the selected source. If the waveform
value is negative (the waveform is below the ground level), the result is displayed as
zero.

19.4 Frequency Analysis

The result of FFT (Fast Fourier Transform) calculations is the frequency spectrum of
the source signal. The horizontal axis of the FFT display is labeled using frequency
(Hz) units instead of time (seconds). In addition, the vertical axis provides the option
of logarithmic scaling (dBVrms/dBArms or dBm). In this mode, the oscilloscope
display is very similar to a spectrum analyzer.
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T3DSO2000A Manual. Page 125