Acquisition and waveform setup
R&S
®
RTO6
114
User Manual 1801.6687.02 ─ 05
The determining point of an acquisition is the trigger. The instrument acquires continu-
ously and keeps the sample points to fill the pre-trigger part of the waveform record.
When the trigger occurs, the instrument continues acquisition until the post-trigger part
of the waveform record is filled. Then it stops acquiring and waits for the next trigger.
When a trigger is recognized, the instrument does not accept another trigger until the
acquisition is complete.
The trigger modes define how the instrument triggers:
●
Normal: The instrument acquires a waveform only if a real trigger occurs, that is, if
all trigger conditions are fulfilled.
●
Auto: The instrument triggers repeatedly after a fixed time interval if the trigger con-
ditions are not fulfilled. If a real trigger occurs, it takes precedence. If the real trig-
ger is faster than the auto trigger, both modes are virtually the same.
In practice, both trigger modes are useful: The auto mode lets you see the signal with
little adjustment, while the normal mode selects the interesting part of the waveform. If
you want to acquire a specified number of waveforms, make sure to select the normal
trigger mode. Thus you get only the required number of interesting acquisitions.
See also:
5.1.3
Horizontal system
5.1.3.1
Parameters of the horizontal system
The control parameters of the horizontal system are tightly connected. Thus, changing
one parameter affects the other parameters as well.
The mathematical dependencies can be summarized as follows:
The number of divisions is 10, which is the only constant parameter.
Basics
