Test Signal Level Setting - Keysight E4980A User Manual

Measurement Procedure and Examples
Test Signal Level

Test Signal Level Setting

The E4980A/AL's test signal level (Vosc in
appropriate value in the voltage or current mode. Using the ALC (automatic
level control) function, the test signal level setting is the same as the applied
level across the DUT (Vm or Im in
setting mode can be selected in the following four ways.
•
•
•
•
For more information on the ALC function, refer to
page
By using the level monitor function (VAC and IAC on the MEAS DISPLAY
page), the actual test signal level across the DUT (Vm and Im in
can be monitored.
Test Signal Level Setting Selection Example for Inductance
Measurements
An inductor's inductance value may differ widely depending on the current
through the inductor due to the permeability of its core material. Making
inductance measurements under constant test signal current levels allows you
to extract the frequency characteristics of the inductor in isolation from its test
signal level characteristics.
To make constant current level measurements, set an appropriate test signal
level in the current value and set ALC to ON. The signal current level through
the inductor will be constant.
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Test signal level set as voltage and ALC set to OFF:
The open terminal voltage is set to the entered voltage value in the LEVEL
field.
Test signal level set as current and ALC set to OFF:
The short terminal current is set to the entered current value in the LEVEL
field.
Test signal level set as voltage and ALC set to ON:
The test signal level across the DUT is set to the entered voltage value in
the LEVEL field.
Test signal level set as current and ALC is set to ON:
The test signal level across the DUT is set to the entered current value in the
LEVEL field.
93.
Figure 7-6) can be set to the
Figure 7-6). Accordingly, the test signal level
"Automatic level control" on
Keysight E4980A/AL Precision LCR Meter
Figure 7-6)