Hioki 8847, Instruction Manual

Page: 178 / 372

9.8 Pre-Trigger Settings
168
This applies to the Memory function only.
You can set whether a trigger is recognized (accepted) if trigger criteria are met during this period.
• When pre-triggering is enabled, trigger events are normally ignored for a cer-
tain period after measurement starts (while recording the specified pre-trigger
period).
• This period is indicated on the Status bar as [Pre-Trigger wait].
Description
When trigger criteria are met during [Pre-Trigger wait]
Example: When the pre-trigger period is set to 50%
9.8.2
Setting Trigger Acceptance (Trigger
Priority)
Procedure
To open the screen: Press the DISP key
→
Waveform screen
→
Press the TRIG.SET key
→
Trigger settings window
Move the cursor to the [Trig Prio] item.
Select
Off Trigger events are ignored during [Pre-Trigger wait]
(default setting)
On Trigger events are recognized (accepted) during [Pre-
Trigger wait] .
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-Trigger wait]
50% of Recording Length
after trigger
T
Trigger ignored
[Now Storing]
Start
Measurement
Recording Length before trigger
Trigger Priority: [On]
[Pre-Trigger wait]
50% of Recording Length after trigger
T
Trigger accepted
[Now Storing]
(A trigger event occurs while 50% of the Recording Length is being
recorded 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