Mathematical operations EN 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 Tablet1000 User manua l Copyright © Qingdao Hantek Electronics Co., LTD 32