Enabling the Trigger Function

This section introduces how to start and stop recording using the trigger function.

Shared settings

> >

1 Under [Trigger], set the trigger function to [ON].

OFF ^☑, ON

The trigger function will be set to [ON], and trigger settings will be enabled.

2 Under [Timing], select the operation to perform when the trigger activates.

Start ^☑	Starts recording when the trigger condition is satisfied (start trigger). Example: Starts recording when the temperature reaches or exceeds 50°C.
Stop	Stops recording when the trigger condition is satisfied (stop trigger). Example: Stops recording if a signal falls below 1 V.
Start & Stop	Starts recording when the start trigger condition is satisfied, and stops recording when the stop trigger condition is satisfied during recording. Example: Starts recording when the temperature reaches or exceeds 50°C and stops recording when the temperature reaches or exceeds 100°C.

Start ^☑

Starts recording when the trigger condition is satisfied (start trigger).

Example: Starts recording when the temperature reaches or exceeds 50°C.

Stop

Stops recording when the trigger condition is satisfied (stop trigger).

Example: Stops recording if a signal falls below 1 V.

Start & Stop

Starts recording when the start trigger condition is satisfied, and stops recording when the stop trigger condition is satisfied during recording.

Example: Starts recording when the temperature reaches or exceeds 50°C and stops recording when the temperature reaches or exceeds 100°C.

3 Under [Pre-trigger], set the time or number of days you wish to record before the trigger.

You can record data before the trigger point (the point in time at which the trigger activates). The ability to record data preceding an anomaly is useful when you need to analyze the cause of an issue.

The pre-trigger will be disabled if the operation to perform when the trigger activates has been set to [Stop] under [Timing].

DD, HH:MM:SS

The maximum setting available for the instrument is 99 days.

To continue recording the waveform after the trigger, make the recording time longer than the pre-trigger.

4 Under [Condition], select the condition for activating the trigger.

Set the activation condition between triggers (analog, pulse, logic, waveform calculation, external, and interval) as a logical AND or logical OR operation.

Recording will start immediately (free-run) if all trigger sources are OFF (if no trigger setting has been made).

OR ^☑	The trigger will activate when even one of the trigger conditions is satisfied (edge-sensitive).
AND	The trigger will activate when all of the trigger conditions are satisfied (level-sensitive).

OR ^☑

The trigger will activate when even one of the trigger conditions is satisfied

(edge-sensitive).

AND

The trigger will activate when all of the trigger conditions are satisfied

(level-sensitive).

No trigger can activate when the trigger conditions have already been satisfied at the start of measurement. The trigger will become able to activate when input signals that did not satisfy the trigger conditions have just satisfied.

Example: ‌To apply the trigger when the waveform crosses 0 V from below to above

Trigger: Level trigger

Level: 0 V

Slope: ↑

[OR]

Activates the trigger when either one crosses 0 V from below to above.

[AND]

Activates the trigger when either one crosses 0 V from below to above while the other is exceeding 0 V.

Difference between pre-trigger standby and trigger standby

When measurement starts, the instrument does not honor any triggers before the amount of time set for the pre-trigger has not elapsed. During this period, the screen will display [Waiting for pre-trigger...]. After the amount of time set for the pre-trigger has elapsed, the instrument will start waiting for the trigger to be satisfied. During this period, the screen will display [Waiting for trigger...].

During pre-trigger standby, the trigger will not activate, even if the trigger conditions are satisfied.

Relationship between pre-triggers and recording time

If the recording time is shorter than the pre-trigger

If the recording time is longer than the pre-trigger