Instructions

Digital Storage Oscilloscope 22
Multiplication and Division
Math operators perform arithmetic operations multiplication or division operation on
any two analog input channels. When you select multiplication or division, the Source
1 and Source 2 values are multiplied or divided point by point and the result is
displayed.
1. Press the [Math] button on the front panel to enter the MATH function menu.
2. Press the Source 1and Source 2 softkey respectively, and then turn the Universal
Knob to select the source to do math operation. Analog channels (CH1 ~CH4) can be
used as Source 1 or source 2.
3. Press the Operation softkey and then turn the universal to select * or / to make
multiplication or division operation. The resulting math waveform is displayed on the
screen and labeled with “M”.
Scale: Press the Scale softkey, and then turn the Universal Knob to select the vertical
scale.
FFT Operation
FFT is used to compute the fast Fourier transform using analog input channels or
reference waveforms. FFT takes the digitized time record of the specified source and
transforms it to the frequency domain. When the FFT function is selected, the FFT
spectrum is plotted on the oscilloscope display as magnitude in dBV versus frequency.
The readout for the horizontal axis changes from time to frequency (Hertz) and the
vertical readout changes from volts to dB. FFT operation can facilitate the following
works:
 Measure harmonic components and distortion in the system
 Measure the characteristics of the noise in DC power
 Analyze vibration
To display a FFT waveform:
1. Press the [Math] button on the front panel to open the MATH function menu.
2. Press the Operation softkey and then turn the Universal Knob to select FFT. The
resulting math waveform is displayed on the screen and labeled with “M”.
3. Press the Source softkey, and then turn the Universal Knob to select the source to
do FFT operation. Analog channels (CH1~CH4) can be used as the source.