Trigger (Trigger Settings)
The trigger is what starts high speed data capturing. The act of starting high speed data capturing when the
trigger conditions are met is referred to as “triggering.”
All the trigger settings for high speed data capturing are shared with those for displaying waveforms. If you
change these settings in the menu for high speed data capturing, the waveform display trigger settings will
also change. For example, if you set the trigger mode to off in the high speed data capturing menu, the trigger
mode for waveform display will also be set to OFF.
Trigger Mode (Mode)
This setting is the same as the waveform display trigger mode setting.
Trigger Source (Source)
This setting is the same as the waveform display trigger source setting.
Trigger Slope (Slope)
This setting is the same as the waveform display trigger slope setting.
Trigger Level (Level)
This setting is the same as the waveform display trigger level setting.
External Sync (External Sync)
You can synchronize the WT1800 with another device during measurement by applying an external sync signal
to the external start signal I/O (MEAS START) connector.
• OFF:
The WT1800 does not synchronize with an external start signal but instead captures data every 5 ms.
• ON: The WT1800 captures data in sync with an external start signal.
For the specifications of the external start signal I/O connector , see section 4.4 in the getting started guide, IM
WT1801-03EN.
• When External Sync is set to ON, the trigger settings are invalid. The trigger feature operates as if the
trigger mode was set to OFF.
• T
o measure in sync with an external signal, set External Sync to ON and apply a number of pulses equal
to or greater than the specified number of data captures + 1 to the external start signal I/O (MEAS START)
connector.
• T
o synchronize multiple WT1800s and perform high speed data capturing, synchronize a WT1800 on
which External Sync has been set to ON to a WT1800 on which External Sync has been set to OFF. When
you synchronize the WT1800s, make sure that they are set to the same number of data captures.
16 High Speed Data Capturing
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