Rise Time Adjustment
The rise time of the step signal can be altered in time domain modes. Be-
sides the standard functionality of increasing the rise time (simulation of
slower digital signals), it is also possible to decrease the rise time to lower
values (S/DTDR-65: 25ps, DTDR-800: 400ps).. In this way, a higher time-
base and spatial resolution can be achieved. Make sure that the number
of averages for the TTC and DUT measurements is sufficiently high to avoid
”ringing” due to overweighted and erroneous spectral components.
Zooming & Moving
Zooming functions are available via the buttons in the toolbar. Furthermore
the zoom can be changed via the mouse (left button & wheel) a ”fit-to-
screen” can be achieved by double right-clicking within the diagram. Press-
ing the button with the lock symbol has the effect that in time domain mea-
surement modes (as
TDR, DTDR & TDR-Compare
) the zoom is locked to the
current zoom of the
Oscilloscope Window
. The result traces can be posi-
tioned by holding the middle button down while moving the mouse.
Measurement Button
A small green arrow button is located in the status bar to start a measure-
ment. Pressing the button has the same effect as pressing the measurement
button in the
Main Window
or pressing F5.
Live Traces
Working in
Quick Operation Mode
(see section
) enables the user to
view a ”live” trace in the
Result Visualization Window
. This feature can be
activated via the menu entry
Extras
→
Live
.
Setting Cursors
The software features (delta) cursors for each displayed sample in the
Re-
sult Visualization Window
. Cursors can be set by pressing down the CTRL
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