Sequid DTDR-65, Operation Manual

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the zero point (
x = 0
cm) to a well defined value.
Please note: the propagation velocity according to the DUT must be set in
the Impedance Measurement Properties Window (see section 6.1.3 ).
•
An automatic zoom can be activated by checking the Auto Zoom check-
box or via the menu View
→
Auto Zoom .
•
In time domain measurement modes ( TDR, DTDR ) the zoom can be
locked to the Oscilloscope Window zoom by pressing the toolbar but-
ton with the lock symbol.
•
The impedance tolerance mask can be set via the Extra
→
Set… menu
items. For further information see section 6.1.3 about the Impedance
Measurement Properties Window .
•
Optional: For an increased accuracy the TTC should be applied. If
TTC measurements have been performed, the corrected impedance-
or TDR-traces can be displayed by checking the Correction checkbox
in the Result Visualization Window . For a detailed description about
working with TTC, please refer to chapter 5 .
•
Please note: other rise times than the predefined ones can be simu-
lated if TTC is activated. This option is capable of characterizing sys-
tems with lower and higher bandwidths. For simulating higher band-
widths (lower rise time) an appropriate number of averages is recom-
mended.
•
Please note: Impedance calculation and TTC are not applicable to
TDT-measurements.
6.1.2 Reference Measurement
A Reference Measurement can be taken in addition to the TTC/12TC. The
software will move the zero point of the spatial axis (x = 0 cm) to the position
of the open-end (the coaxial cable or the TDR-probe tip).
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