•
A suitable probe and 50
Ω
SMA-cables must be used for performing
high-performance impedance measurements.
•
Single-ended measurements can be carried out either on channel 1
(positive step) or channel 2 (negative step). The polarity of the step
is only relevant for a step response trace, but not for impedance or
S-parameter measurements.
•
In case of differential measurements a set of phase-matched coax-
ial cables must be used (e.g. Sequid SPMC-P). It is recommended to
use the cables delivered with the DTDR-65, otherwise the full perfor-
mance cannot be guaranteed.
•
Prepare your
Samples
in the
Sample List
according to point
of the
quick start chapter.
•
The results of the impedance measurements are displayed in the
Re-
sult Visualization Window
(see Fig.
). The impedance is displayed vs.
traveling-time, complying with the time axis in the
Oscilloscope Win-
dow
. The tolerance mask can be defined in the
Impedance Measure-
ment Properties Window
(for more details read section
•
In (D)TDR mode some important values (averaged & min./max. im-
pedance in the impedance mask region) are shown in the right upper
corner of the
Result Visualization Window
as well as in the yellow re-
sult display of the
Main Window
(see Fig.
•
The green check-mark in the upper-right corner (
PASS
indicator) of the
Main Window
indicates whether the measurement passed the toler-
ance check. Otherwise the cross (
FAIL
indicator) indicates that the
tolerance check failed. Additional LEDs (green/red) are located in the
status bar of the
Result Visualization Window
(only if exactly one sam-
ple selected in list).
Please note:
two different options can be chosen to classify the measure-
45