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should be in the first and fourth quadrants, i.e. within (0~π/2) or (3π/2~2π). If the principal axes of
the ellipse are in the second and fourth quadrants, the phase difference angle should be in the
second and third quadrants, i.e. within (π/2~π) or (π-3π/2). See the figure below for better
understanding.
6.6 Example 6: Triggering on Pulse Width
Triggering on a Specific Pulse Width
While testing the pulse width of a signal in a circuit, you may need to verify the pulse width is
consistent with the theoretic value. Or even if the edge triggering shows that your signal has the
same pulse width with the specific signal, you still doubt about the result. Then you can follow the
steps below.
1.
Set the Probe option attenuation to 10X.
2.
Push the AUTO button to trigger a stable waveform display.
3.
Push the Single Cycle option button in the Autoset menu and read out the signal pulse width.
4.
Push the TRIG MENU button.
5.
Select Pulse for the Type option; Select CH1 for the Source option; Click the TRIGGER
LEVEL key to set the trigger level at the bottom of the signal.
Select the When option button and select '='.
6.
7.
Push the Set Pulse Width option button. Set the pulse width to the value read out in Step 3.
8.
Click the TRIGGER LEVEL key to set the pulse width to the value read out in Step 3.
9.
Push the More option button and select Normal for the Mode option. Once triggering on
normal pulses, the oscilloscope can give a stable waveform display.
10. When option is set to >, < or ≠ and there appear any aberrant pulses that meet the specified
DSO1000E Series HandHeld Oscilloscope User Manual
Signal Horizontal
Centering
B
A
D
C
Application Examples
49
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