YOKOGAWA wt3000, Руководство пользователя, Страница: 53 / 384

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IM 760301-01E
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App
Index
Faunctional Description
Trigger «For procedures, see section 6.4.»
A trigger is a cue used to display the waveform on the screen. The trigger is activated
when the specified trigger condition is met. At this point, the waveform is ready to be
displayed on the screen.
• Trigger Mode
Trigger mode specifies the conditions for updating the screen display.
• Auto Mode
If a trigger occurs within a specified amount of time (about 100 ms, referred to as
the timeout period), the waveform display is updated. If a trigger does not occur
within the timeout time, the display is automatically updated when the timeout time
elapses.
• Normal Mode
The display is updated only when the trigger occurs. The display is not updated if
the trigger does not occur.
• Trigger Source
Trigger source refers to the signal that is used in checking the trigger condition.
• Trigger Slope
Trigger slope refers to the movement of the signal from a low level to a high level
(rising edge) or from a high level to a low level (falling edge). When the slope is used
as one of the trigger conditions, it is called a trigger slope.
• Trigger Level
Trigger level refers to the level through which the trigger slope passes.
When the slope of the trigger source passes through the specified trigger level on a
rising or falling edge, a trigger is activated. You can select the input signal of each
element or external clock input signal as a trigger source.
Trigger level
When set to rising ( ),
the trigger occurs here (trigger point)
Trigger source
• Trigger Point
Trigger point refers to the point at which a trigger occurred. The trigger point is always
at the left end of the screen. The waveform after the trigger point is displayed from the
left to the right of the screen as the time progresses.
Trigger point
Time
2.7 Waveform Display