Hioki 8841 - Pre-Trigger

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10.5 Pre-trigger
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Flashing cursor
Function
display
Meaning
:
Move the cursor up in the selection window.
:
Move the cursor down in the selection window.
-95%
50% 50%
95%
Tri
gg
er
p
oint
［
95%］:
95% of the recording in the recording
length is before the trigger
［50%］:
50% before and 50% after the trigger
［-95%］:
Recording is about one recording length
after the tri
gg
er
recording range
(recording
len
g
th
)
NOTE
10.5 Pre-trigger
The pre-trigger function serves to record the waveform not only after but
also before triggering has occurred.
Memory Recorder, Recorder&Memory, and FFT Functions
In the memory recorder function, recorder&memory, and FFT Functions,
using the recording start point as 0% and the recording end point as 100%,
the trigger point can be specified in percent. When all trigger sources are set
to OFF, the pre-trigger setting is invalid.
Procedure
Screen: TRIGGER, Waveform display
1. Display the TRIGGER or Waveform display screen.
2. Move the flashing cursor to the pre-trigger item, as
shown in the figure on the left.
3. Use the Jog/Shuttle control or the function keys to
make a setting.
・
The selection window is not displayed on the
Waveform display screen.
・
The pre-trigger cannot be set to "-95%" at a
recording length of 160,000 DIV. In addition, if the
recording length is set to 160,000 DIV after the pre-
trigger is set to "-95%," the pre-trigger is
automatically reset to "0%."
･
When the pre-trigger is set, the trigger will not be registered for a certain
period after the start of measurement. (During this interval, "Pre-trigger
standby " is shown on the display.)
･
When the trigger can be registered, the indication "Waiting for trigger" is
shown on the display.
･
If the time axis range is set to "EXT." in memory recorder or FFT function,
the pre-trigger can not be set.
･
A stored Recorder & Memory waveform can be triggered simultaneously
with the start of the Recorder waveform, in which case the preset trigger
level for recording is ignored.