R&S RTA4000, Руководство пользователя

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Trigger
R&S
®
RTA4000
77 User Manual 1335.7898.02 ─ 08
6 Trigger
Triggering means to capture the interesting part of the relevant waveforms. Choosing
the right trigger type and configuring all trigger settings correctly allows you to detect
various incidents in signals.
A trigger occurs if the trigger conditions are fulfilled. The instrument acquires continu-
ously and keeps the sample points to fill the pretrigger part of the waveform record.
When the trigger occurs, the instrument continues acquisition until the posttrigger part
of the waveform record is filled. Then it stops acquiring and displays the waveform.
When a trigger is recognized, the instrument does not accept another trigger until the
acquisition is complete.
Trigger conditions include:
●
Source of the trigger signal (channel)
●
Trigger type and its setup
●
Trigger mode
In addition, the horizontal position of the trigger point and the reference point are
important to display the interesting part of the signal. See
Chapter 5.2, "Horizontal
setup" , on page 47.
The trigger level and position are marked in the grid. The markers have the color of the
trigger source. Information on the most important trigger settings is shown in the upper
information bar.
There are several ways to set up the trigger:
●
Use the controls in the Trigger functional block of the front panel.
●
Use shortcuts to adjust the trigger source, trigger mode, and main parameters of
the trigger type.
●
Use the comprehensive menu to select the trigger type and to adjust all trigger set-
tings.
The R&S RTA4000 can output a pulse at the Aux Out connector when the instrument
triggers. See "Pulse" on page 99.
● Trigger controls ....................................................................................................... 78
● Shortcuts for trigger settings ................................................................................... 79
● General trigger settings ...........................................................................................80
● Edge trigger .............................................................................................................82
● Edge A/B trigger ......................................................................................................84
● Width trigger ............................................................................................................85
● Video trigger ............................................................................................................88
● Pattern trigger ......................................................................................................... 90
● Runt trigger ............................................................................................................. 93
● Rise time trigger ......................................................................................................94
● Timeout trigger ........................................................................................................ 96
● Actions on trigger .................................................................................................... 98