User manual

Waveform Setup
R&S
®
Scope Rider RTH
49User Manual 1326.1578.02 ─ 04
For most trigger types, analog and digital channels can be used as trigger source. Digi-
tal channels require option R&S RTH-B1. For video, runt and slew rate trigger, only
analog channels are available.
Remote command:
TRIGger:SOURce on page 169
Trigger Level
Sets the trigger voltage level.
For the Video/TV trigger, the trigger level is the threshold of the sync pulse. Make sure
that the trigger level crosses the synchronizing pulses of the video signal.
Remote command:
TRIGger:LEVel<m>:VALue on page 169
Holdoff Mode
Selects the method to define the holdoff.
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.
"Off"
No holdoff
"Time"
Defines the holdoff as a time period. The next trigger occurs only
after the "Time" on page 49 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 "Events" on page 49.
"Random"
Defines the holdoff as a random time limited by "Min Time / Max
Time" on page 50. For each acquisition, the instrument selects a
new random holdoff time from the specified range.
Random holdoff prevents synchronization to discover effects invisible
with synchronized triggering, e.g. the features of a pulse train.
Remote command:
TRIGger:HOLDoff:MODE on page 169
Time ← Holdoff Mode
Sets the time that has to pass at least until the next trigger occurs.
Remote command:
TRIGger:HOLDoff:TIME on page 170
Events ← Holdoff Mode
Sets the number of triggers to be skipped until the next trigger occurs.
Trigger