MR8740、MR8741_user_manual_eng_20191016H.pdf - 第202页

8.1 Setting Workflow 190 The procedure for making trigger settings is as follows. 8.1 Setting W orkflow T rigger Mode Settings Set whether to continue to accept triggers after measuring. (p.191) T rigger T ype Settings M…

189

Chapter 8 Trigger Settings

Triggering is the process of controlling the start and stop of recording by specific signals or condi-

tions (criteria). When recording is started or stopped by a specific signal, we say the trigger is

"applied" or "triggering occurs".

Trigger settings are made in the Trigger settings window of the Waveform screen.

Trigger Settings Chapter 8

Opening theTrigger settings window

Click [TRIG.SET] in the right-

click menu.

If the trigger setting screen is hard to see due to waveform overlap, narrow the wave-

form display width to divide the waveform display screen and trigger settings screen.

Refer to "6.7.3 Switching the Waveform Display Width" (p.135).

Trigger Settings

• Trigger mode setting (p.191)

• Combining logic (AND/OR) for multiple trigger

sources (p.208)

• Pre-trigger settings (p.204)

Analog Trigger Settings (p.192)

• Level trigger

• Window trigger

• Period trigger

• Glitch trigger

• Slope trigger

Logic Trigger Settings (p.197)

• Setting combining logic for logic triggers

• Trigger filter settings

• Trigger pattern settings

Manual Trigger Settings (p.203)

Trigger Source Settings

Trigger Output (MR8741) (p.341)

Operations available from the Trigger settings window

External Trigger Settings (p.203)

Timer Trigger Settings (p.199)

Searching for trigger positions (p.209)

8.1 Setting Workflow

190

The procedure for making trigger settings is as follows.

8.1 Setting Workflow

Trigger Mode Settings

Set whether to continue to accept triggers after measuring. (p.191)

Trigger Type Settings

Make trigger source-related settings.

• Analog trigger

• Logic trigger

• Timer trigger

• External trigger

• Manual trigger

(p.192)

(p.197)

(p.199)

(p.203)

Pre-Trigger Settings

Set the amount to record before and after a trigger point.

(p.204)

Setting AND/OR Between Trigger

Sources

Select AND/OR logical combination of analog, logic, external

and timer triggers to be applied.

(p.208)

Start Measurement

Click [START] in the right-click menu to start measuring.

(However, operation differs according to the setting for Start Action

(p.311).)

Data acquisition starts when trigger criteria are met.

To stop measurement: Click [STOP] in the right-click menu.

Click once: recording stops at the end of the specified recording length.

Click twice: recording stops immediately.

Available settings for the respective items depend on the function.

• Except for manual trigger, triggering is based on the AND/OR combination of

trigger sources. (p.208)

• When triggering occurs, the TRIG OUT terminal for control of external devices

carries an output signal. (p.341) (MR8741 only)

• Settings for the analog trigger are restricted for the channel of the MR8990

Digital Voltmeter Unit.

• When MR8990 Digital Voltmeter Unit is installed, the trigger position may be

offset by 1 point.

8.2 Setting the Trigger Mode

191

Chapter 8 Trigger Settings

Set whether to continue to accept triggers after measuring.

If all trigger sources are disabled (Off, with no trigger setting), measurement starts immediately

(free-running).

Description Available selections depend on the function.

To Stop Measuring:

Click [STOP] in the right-click menu.

Click once: recording stops at the end of the specified recording length.

Click twice: recording stops immediately.

When the trigger mode is set to [Repeat]

During the processing interval from the end of recording until entering the next

trigger standby condition (Auto Save, waveform display processing, numerical

calculation), triggering will not be accepted.

8.2 Setting the Trigger Mode

Procedure

To open the screen: Right-click and select [DISP] Waveform screen

Move the flashing cursor to the [Trigger] item.

Select the trigger mode.

Select

Single

Only one trigger is recognized. After measurement is start-

ed, once a trigger is applied, a waveform is recorded for the

specified recording length, and measurement then stops.

Repeat

Triggers are accepted continuously.

When no trigger is applied, the instrument enters the Trig-

ger Wait state. Click [STOP] to stop measuring. (See be-

low)

Auto

Triggers are accepted continuously.

If no trigger is applied within about one second, a waveform

of the specified recording length is automatically recorded.

Click [STOP] to stop measuring.

Trigger Mode

Function

Single

(default setting)

Repeat OO

Auto

(default setting)