Operating the Instrument
R&S
®
RTO
75Getting Started 1316.0833.02 ─ 10
In figure 5-1, the signal icons Ch1Wfm1 and Ch2Wfm1 show the signal label, and the
waveforms are displayed in diagrams. All other waveforms are minimized and shown in
the signal view.
Trigger position and trigger level
The blue markers show the horizontal position of the trigger and the vertical trigger
level. You can tap and move the trigger markers in the diagram to set the positions
graphically. The trigger point is the zero point of the diagram.
The trigger position can be moved outside the diagram. A red trigger position marker
indicates that the trigger position is not visible.
Reference point
The reference point marks the rescaling center. If you modify the time scale, the refer-
ence point remains fixed on the screen, and the scale is stretched or compressed to
both sides of the reference point.
You can define the position of the reference point on the screen, and its time distance
from the trigger point of the diagram.
Zoom diagram and zoom area
Zoomed waveforms are shown in separate zoom diagrams, additionally to the wave-
form diagrams. On the original waveform diagram, a rectangle indicates the zoomed
section of the waveform - this is the zoom area. You can modify the zoom area by
dragging the rectangle as a whole, and by dragging its sides - tap the zoom area to
toggle between these modes. Furthermore, you can set exact positions.
The frames of the zoom area and the associated zoom diagram have the same color,
different zooms are marked with different colors. So it is easy to assign zoom area and
zoom diagram.
As for waveform diagrams, you can change the name of the zoom diagram. A zoom in
a zoom and coupled zooms are also possible.
All zooming possibilities are described in detail in the "User Manual", chapter "Zoom".
Histogram and histogram area
A histogram shows the frequency of occurrence of voltage or time values in a bar chart
directly in the diagram. The rectangular histogram area indicates the part of the wave-
form that is considered in the histogram. The vertical histogram counts the voltage val-
ues, and the horizontal histogram counts time values. You can switch between vertical
and horizontal mode, and modify the histogram area by dragging the rectangle as a
whole, by dragging its sides, or by setting exact positions.
Messages
A yellow or red Info button on the toolbar points to the status messages of the instru-
ment. You can open the message box by tapping the button. See also: chapter 5.9,
"Messages", on page 93.
Information on the Display
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