In the Advanced Settings region you can change the following values:
1. The Load Resistor value represents the value of the resistor used for Load calibration.
2. Short Delay Time is the time delay of the Short element used for Short calibration.
• The default settings for Load Resistor and Short Delay Time depend on the
measurement mode.
• If you change a value from its default a warning sign will be shown
• Changing Load Resistor or Short Delay Time will delete the corresponding calibration!
Short Delay Time
The shorting cap used for Short calibration is not an ideal short but adds an additional time-delay to
the signal. This time-delay adds an additional phase shift to the measured reflection coefficient at short
.
For small values of Ts, the short delay time can be translated into an equivalent inductance of
.
Take care when measuring small inductance values in the nH range. The short-delay time or parasitic
inductance of the short will have a strong impact on a low-inductance respectively a low impedance
measurement.
Calibration / Correction
OMICRON Lab
93
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