5.1 Triggering Measurement Start and Stop
108
When trigger timing is set to [Start] or to [Start/Stop], not only the
waveform following the trigger can be measured, but a specified
span of the waveform before triggering as well.
However, when trigger timing is set to [Stop], pre-trigger settings are
disabled.
Make these settings on the [Trig & Alm] screen.
See:"Key Setting Procedure" (p .101)
Setting Criteria for Pre-Trigger Measuring (Pre-Trig)
[Pre-Trig]
Set the amount of time to record before each trigger
event.
To also measure the waveform after triggering, the recording
time must be set longer than the pre-trigger time.
(See "Pre-Trigger and Recording Times" below.)
The maximum settable
time is displayed.
Increment/decrement by 1
(when the recording interval is longer than 2 seconds,
increment/decrement by one recording interval)
Increment/decrement by 10
(when the recording interval is longer than 10 seconds,
increment/decrement by one recording interval)
HiLogger pre-trigger time can be set up to 99 days. Logger Utility settings
of 100 days or more are reduced to 99 days when transferred to the
HiLogger.
Difference between [Waiting for pre-trigger] and [Waiting for trigger]
When measurement is started, the specified pre-trigger length is recorded. This period is indicat-
ed as the [Waiting for pre-trigger].
After the specified pre-trigger length has been recorded, the period indicated as [Waiting for trig-
ger] continues until a trigger occurs.
During the
[Waiting for pre-trigger] interval, trigger criteria are ignored.
T
Pre-Trigger (15 min)
Recording
(10 min)
Measurement ends
with the trigger event
When the recording time is shorter
than pre-trigger time
When the recording time is longer than
pre-trigger time
T
Pre-Trigger (5 min)
Recording
(15 min)
Measuring before
and after triggering
Ends when the record-
ing time has elapsed
Pre-Trigger and Recording Times
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