
Calibration
The Shunt-Thru measurement is basically a Gain measurement that is transformed to an impedance.
Therefore
two
calibrations are possible. Either a Thru-calibration or an Open, Short, Load calibration.
Thru calibration calibrates the underlying S21 measurement and removes the effect of the cable
connection to the DUT.
Open, Short, Load calibration shifts the reference plane directly to the calibration plane.
For more details on calibrating a Shunt-Thru measurement, please refer to
Thru or Series-Thru measurement
Typical applications
A typical application for the Shunt-Thru measurement mode is the ESR measurement of ultra-low ESR
decoupling caps.
7.4.4 Shunt-Thru with series resistance
Shunt-Thru with series resistance is very similar to the normal Shunt-Thru measurement mode. For
more details regarding the normal Shunt-Thru measurement mode, please see
Measurement information
Bode 100
measures
S21
gain and calculates impedance
Z
using the equation:
Compared to the normal Shunt-Thru measurement mode, the series resistors increase the maximum
measurable impedance. This is of advantage when one needs to measure from roughly 10 mΩ to
some kΩs.
The higher the series Resistors
Rs
are chosen, the higher the maximum recommended impedance is.
However, at the same time the lower impedance limit rises.
Measurement types and applications
OMICRON Lab
65
Содержание Bode 100
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