User manual

Triggers
R&S
®
RTO
55User Manual 1316.0827.02 ─ 06
3.2 Setting Up the Trigger
This chapter provides step-by-step procedures for the important stages of trigger setup.
The dialog boxes and settings are described in detail in chapter 3.3, "Reference for Trig-
gers", on page 57.
3.2.1 Configuring the Trigger Event
Prerequisites:
●
Horizontal and vertical settings are set appropriately to the signals.
●
The acquisition is running, the RUN CONT key lights green.
For details on event settings, see chapter 3.3.1, "Events", on page 58.
Proceed as follows:
1. Press the TRIGGER key on the front panel.
The "Trigger" dialog box opens with the "Events" tab.
2. At the left hand-side, select the vertical tab of the event you want to set up: "A Trig-
ger", "B Trigger", or "R Trigger".
3. Tap the "Source" button and select the trigger source.
4. Check the trigger coupling and filter settings. To change the settings, tap the "Channel
Setup" button and "Digital Filter" button.
If the trigger source is "Extern", you can adjust the coupling and filters directly in the
"Events" tab.
5. Tap the "Type" button and select the trigger type.
6. Under "Trigger type dependent settings", configure the settings for the selected trig-
ger type.
To let the instrument find the trigger level, tap "Find level".
See: chapter 3.3.1, "Events", on page 58
7. If you want to set the "Normal" trigger mode, do either of the following:
● Press the AUTO/NORMAL key on the front panel until NORMAL lights up.
● Tap the "Normal" button in the "Control" tab.
3.2.2 Positioning the Trigger
By positioning the trigger on the time axis, you define which part of the waveform is
displayed: mainly the pre-trigger part, or the post-trigger part, or the part around the trig-
ger point.
For details on position settings, see chapter 3.3.5, "Trigger Position", on page 83.
1. Press the TRIGGER key and select the "Trigger Position" tab.
Setting Up the Trigger