Voltage/Current - Omicron Lab Bode 100 User Manual

Measurement types and applications
Calibration
The Series-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 Series-Thru measurement, please refer to 8.3.4 Calibrating a Shunt-
Thru or Series-Thru measurement on page 84.
Typical applications
A typical application for the Series-Thru measurement is the measurement of DUTs with low
conductivity (high impedance).

7.4.6 Voltage/Current

The Voltage/Current measurement mode is basically a Gain measurement with external reference
similar to the Gain/Phase measurement mode. However, the fact that the Gain is treated as an
impedance result offers all impedance result formats such as L, C and Q calculations.
Measurement information
Bode 100 measures Gain and transforms it directly to impedance Z using:
The voltage/current measurement is very flexible. The usable impedance measurement range cannot
be generalized since it strongly depends on the used probes and connections. Using highly sensitive
current sensing, very high impedance values can be measured. Using very sensitive voltage
measurements, very low impedance values can be measured.
Calibration
The Voltage/Current 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 gain measurement and removes gain and phase shifts of the
probes. A 1 Ω resistor is needed to perform a Thru calibration in the Voltage/Current measurement
mode.
Open, Short, Load calibration shifts the reference plane directly to the calibration plane.
OMICRON Lab 67