2-24
IM 701240-01E
Trigger Mode «For procedures, see section 6.1.»
The trigger mode sets the conditions for updating the displayed waveforms. The
following six trigger modes are available.
Auto Mode
If a trigger occurs within a specified amount of time (approximately 50 ms, referred to as
the timeout period), the displayed waveforms are updated. If a trigger is not activated
within the timeout period, the displayed waveforms are automatically updated.
Auto Level Mode
Within the timeout period (approximately 1 s), the waveforms are displayed in the same
fashion as in the auto mode. If a trigger is not activated within the timeout period, then
the center value of the amplitude of the trigger source is detected, and the trigger level is
changed to that value. A trigger is activated using the new value, and the displayed
waveforms are updated.
1/2 the amplitude
1/2 the amplitude
Trigger level
Amplitude
Normal Mode
The waveform display is updated only when a trigger occurs. (The displayed waveforms
are not updated if a trigger does not occur.)
Single Mode
When a trigger is activated, the displayed waveforms are updated only once, and
acquisition stops. This mode is suitable for observing a single-shot signal.
Single (N) Mode (Sequential Store Function)
This mode is selected when using the sequential store function (see section 2.4).
Waveforms are acquired and stored in different memory areas each time a trigger is
activated the specified number of times. Then, acquisition is stopped, and all the
acquired waveforms are displayed. Acquired waveforms can be displayed together, or
they can be displayed individually. This mode is useful for detecting sudden
abnormalities in a waveform.
1
st
acquisition
2
nd
acquisition
n
th
acquisition
Log Mode
In this mode, the trigger settings are disabled. The specified record length of data is
acquired once when acquisition is started, and the displayed waveforms are updated.
2.3 Setting the Trigger