2-29
IM 701210-05E
Explanation of Functions
2
Trigger Hysteresis <Sections 6.5 to 6.16>
If noise is present in the trigger source and there is insufficient trigger level width, the
trigger point fluctuates each time a trigger is activated. This causes the displayed
waveforms to be unstable. To solve this problem, a specified margin (hysteresis) is
added to the trigger level. You can select the trigger hysteresis from the following:
,
, and . The hysteresis width varies depending on the input module.
Trigger is activated
Hysteresis width
Trigger Hold-off <Section 6.4>
The trigger hold-off function temporarily stops the detection of the next trigger once a
trigger has been activated. This function is useful when observing a pulse train signal,
such as a PCM code and you wish to display the waveform in sync with repetitive cycles;
or when using the history memory function described later and you want to change the
waveform acquisition period.
Input signal
Repetition period: T
Trigger level
Trigger source
signal
t
Trigger signal limited by hold off time t (when the trigger slope is set to rising edge)
Action-on-Trigger <Section 6.18>
A specified action can be carried out each time a trigger occurs or when the waveform is
displayed after acquiring the specified record length of data or when measurement is
stopped after the measurement is started.
• Print the Screen Image Data (PRINT)
Prints the screen image data to a specified printer.
• Save the Screen Image Data (Image)
Saves the screen image data to the save destination specified in the IMAGE SAVE
menu.
• Save Waveform Data (Save to File)
Saves the waveform data in binary, ASCII, or floating format to the save destination
specified in the FILE menu.
• Beep Sound (Buzzer)
Sounds a buzzer.
• Send Mail
Sends an e-mail message to a specified address. (when the Ethernet interface option
is installed)
2.3 Setting the Trigger
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