6-1
6
IM 701830-01E
Triggering
6.1
Setting the Trigger Mode
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For a description of this function, refer to page 1-10.
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Function
Auto mode
Auto mode is the one which is used normally. The display is updated in the following two
cases.
• When the trigger conditions are met: Updated when the trigger conditions are met
• When 50 ms elapses without trigger conditions being met: Updated automatically
In auto mode, the waveform can still be observed even if no trigger is activated, hence it is
useful when you want to check the waveform and ground level even when no trigger is detected.
However, if the period of the trigger signal is 50 ms or longer, the above two conditions will be
satisfied alternately. In this case, use normal mode.
Auto level mode
• If a trigger is activated before timeout, it displays the waveform in the same way as in auto
mode.
• If the trigger is not activated within the timeout time, then the center value of the amplitude
of the trigger source is detected, and the trigger level is changed to that value. The trigger is
activated using the new value and the displayed waveform is updated.
• This mode can only be selected for simple triggers.
Normal mode
The display is updated only when the trigger conditions are met. The display will not be
updated if no trigger occurs. Therefore, to check the waveform or ground level when no trigger
is detected, you must use auto mode.
Timer Trigger
The trigger is activated at the specified interval from the specified time.
Note
• Pressing the “
Single Start
” or “
Log Start
” soft key acquires the waveform once and displays it.
Refer to page 4-6.
• The trigger mode setting applies to both simple and enhanced triggers.
• In the normal mode when the maximum acquisition count is set to one (see section Appendix 2), if you
press the stop key when the waveform acquisition is in the “Waiting for trigger” state, then the
displayed waveform is updated with the waveform when the key was pressed.
Operating Procedure
1.
Press the
SIMPLE
key or the
ENHANCED
key.
2.
Press the “
Mode
” soft key to select “
Auto
” or “
Normal
.”
Simple trigger mode
Enhanced trigger mode
Chapter 6
Triggering
