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4.
Open the
Impedance Measurement Properties Window
(e.g. ALT-I).
5.
Define the tolerance mask area by setting the x-axis (see
??
) and either
the linear or the impedance difference, depending on the setting in
the
Seunis.config
file. Set
"Compare linearly"
to either
"0"
or
"1"
.
6.
The result is shown in the
Result Visualization Window
. The yellow
result field and the sample list in the
Main Window
show a PASS/FAIL
indication.
6.3 (D)S11 - Measurement Mode (optional)
These optional measurement modes (single-ended & differential) are for
acquiring the frequency dependent reflection coefficients (
S
11
-parameter).
Frequency- and time domain signals are connected via the Fourier-Transform
thus TDR signals can be transformed into
S
11
by applying a proper signal pre-
processing in combination with a Fast-Fourier-Transform (
FFT
). It is essential
to activate the
TTC
before using this mode (detailed information about ap-
plying
TTC
can be found in chapter
Figure 9: Magnitude and Smith-Chart of reflection coefficient
S
11
57