Teledyne T3SP Series Operator's Manual page 41

defined as fraction of speed of light. Otherwise it is calculated
based on the Line Type and the defined geometry.
In the Line Type selection box the user can chose between Air-
line, Microstrip, Stripline, Coaxial Line and Other. The selection
affects the propagation velocity. If the velocity shall be set man-
ually, please select Other.
The dielectric constant affects the propagation velocity of the
signal (except line-type Air Line or Other is selected) and there-
fore has influence on the x-axis [cm] in the Result Visualization
Window and the exported impedance report.
The tan field is currently not used for this kind of impedance
measurements and therefore purely informative.
Using the Ohmic Loss functionality enables for the compensat-
ing of the slopes in impedance traces due to ohmic losses. The
ohmic loss of a line yields to an increasing impedance trace over
time/space which is not related to the wave impedance of the
line. This loss value can be set in order to remove the slope. Set-
ting the field to "auto" will result in an automatic compensation
for the currently selected sample(s).
The value can automatically be calculated by the software from
the impedance slopes of existing measurements:
Make sure a valid reference measurement (yellow LED in
the TTC indicator) is available.
Go to the Main Window and select the sample(s) which
shall be considered for the automatic ohmic loss calcula-
tion.
T3SP-Series Operator's Manual
41
931776 RevB