User Manual

6.5 Pre-Trigger Settings
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6
Chapter 6 Trigger Settings
When pre-triggering is enabled, trigger events are normally ignored for a certain
period after measurement starts (while recording the specified pre-trigger
period). This period is indicated on the Status bar as [Pre-Trig Wait].
You can set whether a trigger is recognized (accepted) if trigger criteria are met
during this period.
Description When trigger criteria are met during [Pre-Trig Wait]
Example: When the pre-trigger period is set to 50%
6.5.2 Setting Trigger Acceptance (Trigger Priority)
Trigger Priority Setting
To open the screen: Press the SET key → Select with the SUB MENU keys →Trigger Settings screen
See Screen Layout (
⇒ p. 33)
Operating Key Procedure
1
CURSOR
Move the cursor to the [Trigger Priority] item.
2
F1 to F8
Select the priority of trigger events.
Off Trigger events are ignored during [Pre
-
Trig Wait] (default setting)
On Trigger events are recognized (accepted
)
during [Pre-Trig Wait].
50% of Recording Length
after trigger
50% of Recording Length
before trigger
Trigger Priority: [Off]
T
(After 50% of the Recording Length is recorded internally, the [Trigger
Wait] state begins)
[Trigger Wait][Pre-Trig Wait]
T
Trigger ignored
[Storing]
Start Measurement
Pre-Trigger Recording Length
Trigger Priority: [On]
[Pre-Trig Wait]
50% of Recording Length after trigger
T
Trigger accepted
[Storing]
(A trigger event occurs while 50% of the Recording Length is being record-
ed internally)
When a trigger event occurs during pre-trigger recording, the data actually recorded
may be shorter than the specified recording length. (In this case, the pre-trigger re-
cording length is shortened. The recording length after the trigger event is the speci-
fied recording length minus the specified pre-trigger period.
Start Measurement