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Trigger
R&S
®
MXO 5 Series
154User Manual 1802.3369.02 ─ 02
Force trigger
Provokes an immediate single acquisition. Force the trigger if the acquisition is running
in normal mode and no valid trigger occurs. Thus, you can confirm that a signal is
available and use the waveform display to determine how to trigger on it.
Remote command:
TRIGger:FORCe on page 510
Holdoff mode
Selects the method to define the holdoff condition.
The trigger holdoff defines when the next trigger after the current will be recognized.
Thus, it affects the next trigger to occur after the current one. Holdoff helps to obtain
stable triggering when the oscilloscope is triggering on undesired events.
Holdoff settings are not available if the trigger source is an external trigger input or
serial bus, and if you trigger on a sequence of events.
Example:
For example, you want to analyze the first pulse in a burst of several pulses. At first,
you select a sufficiently slow time base to display the entire burst. Then, you set the
holdoff time a little longer than the length of the burst. Now, each trigger corresponds to
the first pulse in successive bursts, and you can change the time base to display the
waveform in more detail.
The following methods are available:
"Time"
Defines the holdoff directly as a time period. The next trigger occurs
only after the "Holdoff time" has passed.
"Events"
Defines the holdoff as a number of trigger events. The next trigger
only occurs when this number of events is reached. The number of
triggers to be skipped is defined in "Holdoff events".
"Random"
Defines the holdoff as a random time limited by "Minimum time" and
"Maximum time". For each acquisition cycle, the instrument selects a
new random holdoff time from the specified range.
Random holdoff prevents synchronization to discover effects invisible
with synchronized triggering, for example, the features of a pulse
train.
"Auto"
The holdoff time is calculated automatically based on the current hori-
zontal scale.
"Auto time scaling" defines the factor that the horizontal scale is multi-
plied with.
"Auto time" shows the resulting holdoff time: Auto time = Auto time
scaling * Horizontal scale.
"Off"
No holdoff
Remote command:
TRIGger:HOLDoff:MODE on page 511
TRIGger:HOLDoff:TIME on page 513
TRIGger:HOLDoff:EVENts on page 512
TRIGger:HOLDoff:MAX on page 512
Trigger mode / holdoff
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