MR8740T_Quick guide_eng_20191016H.pdf - 第80页
74 Conguring the Level T rigger Settings Conguring the trigger source settings > [T rigger] > [Source] 1 3 2 4 5 6 1 Click a trigger source you want to specify . The setting dialog box will appear . Y ou can set …
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Conguring the Level Trigger Settings
3.4 Conguring the Level Trigger Settings
The trigger function allows you to start and stop measurements using specic signals. When
recording is started by specic signals, it is called “The instrument is triggered.” The trigger function
is useful to nd trends in unexpected events. This section explains “level trigger,” which triggers
the instrument at a specied value. For details about triggers other than the level trigger, refer to “
5
Specifying the Trigger Settings”
of the Instruction Manual.
Cross-trigger settings
> [Trigger] > [Common]
2
1
1
Click the [Trigger] button to set it to [On] or [Off].
Off
Disables the trigger function.
On Enables the trigger function.
2
Click the [Timing] box, and then choose a trigger recording method from the list.
Start
Starts recording when the instrument is triggered, and stops the recording after the
instrument has acquired the recording-length waveforms.
3
Measurement Method
74
Conguring the Level Trigger Settings
Conguring the trigger source settings
> [Trigger] > [Source]
1
3
2
4
5
6
1
Click a trigger source you want to specify.
The setting dialog box will appear.
You can set four triggers per module.
2
Click the [Channel] box, and then choose a channel to be used for the level trigger from the
list.
3
Click the [Type] box, and then choose [Level] from the list.
4
In the [Level] box, enter a threshold value the level trigger condition is satised at.
5
Click the [Slope] box, and then choose a signal direction that allows the level trigger
condition to be satised from the list.
Choose a direction used to trigger the instrument when the signal crosses the threshold value specied in
[Level].
The level-trigger condition is satised when a signal crosses the threshold value in the
positive direction.
The level-trigger condition is satised when a signal crosses the threshold value in the
negative direction.
6
Click the [Filter] box, and then choose a sampling count of the lter from the list.
Only after the level-trigger condition is continuously satised during the specied period, an analog trigger is
generated. This is useful to prevent the instrument from triggering due to noise.
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Starting/Stopping Measurement
3.5 Starting/Stopping Measurement
Starting a measurement
When you click the start icon, the instrument starts a measurement.
Waveform data shown on the screen is cleared once the measurement starts.
Stopping the measurement
Clicking the stop icon causes the setting dialog box to open.
Leave the instrument performing the measurement. Once the instrument has acquired
the waveforms with the specied recording length, it stops the measurement.
Clicking [OK] stops the measurement immediately.
Initializing the instrument (Restoring the basic settings)
Select > [System] > [Initialize] to restore the instrument settings to the factory default. The
setting after the initialization is suitable for simple measurement. If any unexpected or complicated
behavior is observed, initialize the instrument.
Refer to “6.2 Initializing the Instrument” (p. 147).
To conguring measurement settings automatically
Clicking [Auto range] on the waveform screen automatically species the sampling rate,
measurement range, and zero position of the input waveform and start a measurement.
Refer to “3.7 Measuring Signals With the Auto-range Setting” (p. 78).
3
Measurement Method