The measurement is performed by clicking the
button in the toolbar
of the
Main Window
, by pressing
F6
or by using the menu item
Extras
→
Reference Measurement
. The presence of the measurement is indicated by
a yellow LED below the TTC/12TC indicators.
Please note:
•
The time axis is fixed and will not be affected by this.
•
If no
Reference Measurement
is available but the TTC/12TC is active
the start value equals the reference plane of the ”Open” calibration
measurement.
•
Best practice is to take a measurement with connected TDR-probe (if
applicable) but without a DUT.
6.1.3 Impedance Measurement Properties Window
The
Impedance Measurement Properties Window
gives the user the oppor-
tunity to specify his measurement objects in more detail (see Fig.
). It can
be opened via the
Main Window
menu entry
Edit
→
Properties
.
General information can be passed to identify the measurements for later
use. Some details are necessary for a realistic characterization of the mea-
surement objects.
Remark:
the software displays the x-axis of the impedance trace vs. the traveling
time t[ns] or versus a spatial resolution L[cm]. The software needs some of the in-
formation (explicitly the velocity or alternatively line-type and geometry) to convert
the traveling-time into spatial information. Furthermore the reference plane can be
set to the TDR probe tip, by performing a reference measurement (F6 or Extras
→
Reference Measurement).
•
The
General Information
group holds information about the objects
under test and about the user. The information is used for creating
impedance reports and is stored in project file.
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