User Manual

6.5 Pre-Trigger Settings
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6
Chapter 6 Trigger Settings
Description About pre-triggering and the recording period (recording length)
Trigger events during the specified pre-trigger recording period are ignored.
To enable recognition of such triggers, set Trigger Priority to [On].
See "6.5.2 Setting Trigger Acceptance (Trigger Priority)" (
⇒ p. 137)
Difference between [Pre-Trig Wait] and [Trigger Wait]
When measurement is started, the specified pre-trigger length is recorded. This
period is indicated as the [Pre-Trig Wait].
After the specified pre-trigger length has been recorded, the period indicated as
[Trigger Wait] continues until a trigger occurs.
See "Measurement and Internal Operations" (⇒ p. 76)
1
2
Pre-Trigger Settings
To open the screen: Press the SET key → Select with the SUB MENU keys →Trigger Settings screen
See Screen Layout (
⇒ p. 33), To set from the Waveform screen (⇒ p. 161)
Operating Key Procedure
1
Select the setting method (% or div) for pre-triggering.
CURSOR
Move the cursor to the [Pre-Trigger] item.
F1 to F8
Select either choice.
2
Specify the numerical value.
CURSOR
Move the cursor to the [% Setting] or [DIV Set-
ting] item.
F1 to F8
Enter the numerical value.
Setting Range:
% Setting from –100 to 100%
DIV Setting from –(recording length) to (record-
ing length) divisions
%
Set as a percentage. (default setting)
DIV
Set as a number of divisions.
When using external sampling, set as a
number of samples.
Pre- and post-trigger recording times are
displayed in accordance with the setting
9
5% 95% of the recording length is
recorded before the trigger
point
5
0% 50% of the recording length is
recorded before and 50% after
the trigger point
-
95% 95% of the recording length is
recorded after the trigger point
T
P
re-Trigger setting examples
Trigger Point