User manual

Triggers

R&S

RTO

81User Manual 1316.0827.02 ─ 06

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.

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 "Random minimum

time" and "Random 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.

Reference for Triggers