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To measure FFT waveform:
To make cursor measurements, press the Cursors button, and then press the Mode
softkey to select On to turn the cursors on, Use the X1 and X2 cursors to measure
frequency values and the difference between two frequency values (ΔX). Use the Y1 and
Y2 cursors to measure amplitude in dB and difference in amplitude (ΔY). You can find the
frequency value at the first occurrence of the waveform maximum by using the X at Max Y
measurement.
Note: please refer to the cursors chapter to understand how to use the cursors.
Math Function Operation
The oscilloscope supports math function operation including differential (d/dt), integral (∫dt)
and square root (
).
Differen�ate
d/dt (differentiate) calculates the discrete time derivative of the selected source.
Where:
●
d = differential waveform.
●
y = channel 1, 2, 3, or 4 data points.
●
i = data point index
●
Δ t = point- to- point time difference.
The dx option under d/dt math function operation menu shows the point- to- point time
difference, and it ranges from 0.02div to 0.40div. "div" indicates the number of the pixel
points that each division has. The oscilloscope has 50 pixel points per division. Take
0.2div as an example: 0.2*50=10. It means to calculate the ten point's discrete time
derivative of the selected source, and the Δ t is the ten point's point- to- point time
difference.
124 User Manual
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