Measurement setups
R&S
®
LCX Series
59
User Manual 1179.2260.02 ─ 02
For an example on how to configure the test signal parameters, see
6.3
Configuring BIAS
Referred to as biasing defines the method of superimposing a voltage or current on an
existing voltage/current to shift the operating point of an electronic component to a spe-
cific value.
With the bias function of the R&S
LCX, you can predefine a working DC bias that cor-
responds to an expected supply voltage, or (current) in a circuit. The function enables
you, to measure the component sample under operating conditions, as expected for
the intended use.
Example: DC dependency of inductors
To measure the current flowing through an inductor under real conditions, e.g., in
power supplies, the current of approximately
<
0.1
mA supplied by the R&S
LCX is not
sufficient. To achieve higher current, the most common method is to superimpose the
AC with a DC current.
How to:
Example: DC dependency of capacitors
Some capacitor types, e.g. electrolytic or tantalum capacitors, require a positive volt-
age bias to achieve accurate measurements of the component sample. To add the
bias, you can use either the internal bias source, or supply the bias externally, e.g.
using a power supply.
How to:
"Setting an external voltage bias"
6.3.1
Internal bias voltage
Setting an internal voltage bias
To bias a capacitive component sample:
1. To select the capacitance measurement (DUT component type), press the [C] key.
2. Configure the test signal.
3. To select the parameters for measurement results display:
a) Select the measurement pair softkey in the upper left corner, to open the selec-
tion editor.
b) Select the parameters "Cp-D" (parallel capacitance, dissipation factor).
c) Confirm you selection.
d) Repeat the steps to select the second parameters, e.g. select "Cp-Rp" (parallel
capacitance, parallel resistance).
4. To set the voltage bias value:
Configuring BIAS
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