User`s manual

1-11
IM 701610-01E
Functions
1
Trigger Mode <Section 6.1>
Conditions for updating displayed waveforms are set. The following five types of trigger
mode are available:
Auto Mode
Displayed waveforms are updated each time a trigger is activated within a specified time
(approximately 100 ms, referred to as the time-out period) and are updated automatically
after each time-out period.
Auto Level Mode
Waveforms are displayed in the same way as in Auto mode if a trigger is activated within
the time-out period. If no trigger is activated, the center value of the amplitude of the
trigger source (section 1.3) is detected and the trigger level is changed automatically to
this center value, then a (edge) trigger is activated to update the displayed waveforms.
Half the Amplitude
Half the Amplitude
Trigger Level Amplitude
Normal Mode
Displayed waveforms are updated only when a trigger is activated. Displayed
waveforms will not be updated if no trigger is activated.
Single Mode
When a trigger is activated, displayed waveforms are updated only once, then
acquisition stops. This mode is useful when you are observing a single-shot signal.
Single (N) Mode
This mode is useful when using the sequential store function (see section 7.3).
Waveforms are acquired and stored in different memory areas each time a trigger is
activated, then acquisition stops, and the waveforms are displayed. Acquisition is
performed the specified number of times. Acquired waveforms can be displayed
together, or they can be displayed individually. This mode is useful when you want to
detect a sudden abnormality in a waveform.
1st Acquisition 2nd Acquisition Nth Acquisition
Action-On Trigger <Section 6.15>
The displayed waveform can be output to the optional built-in printer, buzzer, or saved to
a floppy disk, a Zip disk, or a PC card each time a trigger is activated. Also sends a mail
(Ethernet interface (option)).
Trigger Coupling <Sections 6.5, and 6.8 to 6.13>
Input coupling can also be switched for trigger sources as it is for input signals. Select
the type of input coupling which is most suitable for the trigger source signal.
The following two types of input coupling are available for trigger source signals.
• DC: The trigger source signal is used as the trigger source without any process.
• AC: The trigger source signal is used as the trigger source after DC the content has
been removed from it. A trigger can always be activated if the trigger level is set
to 0 V as long as the signal’s amplitude is one division or more.
1.3 Setting a Trigger