Mathematical operations
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Tablet1000 User manual Copyright © Qingdao Hantek Electronics Co., LTD
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1. Tap the MATH channel icon to enter the MATH menu.
2. Select “+” to perform addition.
3. Select data sources 1 and 2.
4. A mathematical operation waveform appears on the screen and is labeled "M".
5. Change the offset by sliding the operation waveform. Or set the offset directly in the
menu.
Figure 7.2 Addition operation
7.2 FFT operation
Use FFT to convert the time domain (YT) signal to the frequency domain for the selected
data source. The vertical axis shows amplitude (in decibels or VRms) and the horizontal
axis shows frequency.
Data source
Select the data source CH1 to CH4 to perform the calculation.
Vertical units
Select the unit of the vertical scale, VRms or dB.
Window
Applied to FFT Window functions. Including: Hanning, Hemming, Brackman, Bartlett, flat
top, rectangular.
Hanning: Good frequency resolution, poor amplitude resolution. Used for measuring
periodic waveform.
Hamming: Slightly better than the hanning window in frequency resolution. Used for
measuring transient and short pulse waveforms.
Brackman: Best amplitude resolution, worst frequency resolution. Used for measuring
single frequency signals and search for higher harmonics.
Bartlett: Good frequency resolution. Used to measure strong signals with narrow
bandwidth.
Flat top: Good amplitude resolution, poor frequency resolution. Used to measure
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