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Note: The difference between the overtime and the delay triggers is that the overtime trigger can identify the pulse
you need according to your set time and trigger on any point of the pulse. In the other word, the overtime trigger
occurs based on pulse identification. It is similar to the > mode of the pulse width trigger, but not the same.
6.10
Example 10: Using Math Functions to Analyze Waveforms
Using math functions to analyze input waveforms is another advantage of the digital oscilloscope. For example, you
want to get the instantaneous difference between two channel waveforms. By using the math function of the
oscilloscope, you can get a better representation of the waveform on the screen. To observe this signal, follow the
steps below.
1.
Set the Probe option attenuation to 10X.
2.
Open CH1 and CH2 at the same time, both with the attenuation of 10X.
3.
Push the AUTOSET button to trigger a stable waveform.
4.
Push the MATH MENU button to see the Math menu.
5.
Push the Operation option button and select ‘CH1+CH2’.
6.
Turn the horizontal SEC/DIV and the vertical VOLTS/DIV knobs to properly scale the waveform for easy check.
In addition, the oscilloscope also supports the - and FFT functions. For a detailed analysis on FFT, refer to
Note: You should compensate both probes before performing the math operation; otherwise, differences in probe
compensation will appear as errors in the differential signal.
