Using Fft Function - Owon PDS8102T User Manual

User Manual of OWON Color Mixed Signal Digital Storage Oscilloscope
The corresponding FCL (Functional Capabilities List) of the Wave Form
Calculation
Setting
CH1-CH2
CH2-CH1
CH1+CH2
CH1*CH2
CH1/CH2
FFT
Taking the additive operation between Channel 1 and Channels 2 for example, the
operation steps are as follows:
1. Press the MATH MENU button and call out the WAVE MATH menu.
2. Press the F3 menu selection button and choose CH1+CH2. The green calculated
wave form M is displayed in the screen; press the F3 menu selection button again,
the wave form M is closed off (see Fig.5-8).
Fig. 5-8 Wave Form resulted from CH1 +CH2 Mathematical Manipulation

Using FFT function

An FFT breaks down signals into component frequencies, which the oscilloscope uses
to display a graph of the frequency domain of a signal, as opposed to the oscilloscope's
standard time domain graph. You can match these frequencies with known system
frequencies, such as system clocks, oscillators, or power supplies.
FFT in this oscilloscope can transform 2048 points of the time-domain signal into its
frequency components and the final frequency contains 1024 points ranging from 0Hz to
Nyquist frequency .
Description
Subtract the Channel 2 wave form from the Channel 1 wave form.
Subtract the Channel 1 wave form from the Channel 2 wave form.
Add the Channel 1 wave form to the Channel 2.
Multiply Channel 1 wave form by Channel 2 wave form.
Channel 1 wave form is divided by the Channel 2 wave form.
Waveform of Corresponding
FFT operation.
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