8
Operating Math functions
• Math functions are displays of +, -, x,
÷
and
FFT mathematical results of CH1 and CH2.
The menu options are:-
FFT spectrum analysis
• Using FFT algorithm you can convert the domain signals (YT) into frequency
domain signals.
• With FFT you can observe the following types of signals:
1. Measure the harmonic wave composition and distortion of the system.
2. Demonstrate the noise characteristics of the DC power.
3. Analyse oscillation.
• Signals with DC quantities or DC offset will cause error or offset FFT waveform
quantities. To reduce DC quantities select AC coupling.
• To reduce random noise and frequency aliasing as a result of repeated or single
pulse event, set the acquired mode of the oscilloscope to average acquisition.
Functions Menu Setup Notes
Type Math To carry out +, -, x, ÷ functions
Signal source 1 Ch1
Ch2
Set signal source 1 as CH1 waveform
Set signal source 1 as CH2 waveform
Operator +
-
x
÷
Signal source 1+ Signal source 2
Signal source 1- Signal source 2
Signal source 1x Signal source 1
Signal source 1÷ Signal source 2
Signal source 2 Ch1
Ch2
Set signal source 2 as CH1 waveform
Set signal source 2 as CH2 waveform
Scaling ratio
1/1
1/10
1/100
1/1000
Scaling the waveform according to the four ratio
options
Functions Menu Setup Notes
Type FFT To carry out FFT algorithm functions
Signal source
Ch1
Ch2
Set CH1 as math waveform
Set CH2 as math waveform
Window
Hanning
Hamming
Blackman
Rectangle
Set Hanning window function
Set Hamming window function
Set Blackman window function
Set Rectangle window function
Vertical coordinate Linear/dbv Sets vertical coordinate
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