10.3.4 Calibrating a Shunt-Thru or Series-Thru measurement
In this section you learn how to calibrate an Impedance, Reflection or Admittance measurement in the
Shunt-Thru or Series-Thru measurement mode.
Shunt-Thru and Series-Thru are based on a S21 Transmission measurement. Bode 100 measures
S21 and the Bode Analyzer Suite calculates impedance from the S21 measurement. Details on the
calculation can be found in 8.2.3 Shunt-Thru on page 66 and 8.2.5 Series-Thru on page 69.
You can either calibrate the underlying S21 measurement using Thru calibration or you can use Open/
Short/Load calibration to move the reference plane directly to the DUT.
Shunt-Thru and Series-Thru allow both, Thru or Open/Short/Load calibration.
However, only one calibration can be active at a time!
Even if both calibrations have been performed only one calibration is applied.
You must select the calibration you want to apply using the slider in the calibration dialog.
If the arrow points to the left, Thru calibration is applied.
If the arrow points to the right, Open/Short/Load calibration is applied (see example below).
Shunt-Thru calibration connections
Calibrating Thru:
Thru calibration can e.g. remove the gain and
phase error introduced by the connection cables
including a coaxial common mode transformer
that is generally used in this measurement to
suppress the cable-braid error.
Calibrating Open/Short/Load:
Open calibration.
100
OMICRON Lab
To Next Page
Loading...
