Keysight E4980A - Test Signal Level

Keysight E4980A/AL Precision LCR Meter 193
Measurement Procedure and Examples
Test Signal Level
Test Signal Level
Most components have impedance characteristics that are dependent on the
applied test signal level. Consequently, the test signal level should be set
appropriately for each DUT.
Test Signal Level Across the DUT
Figure 7-6 shows a simplified model of the E4980A/AL and a DUT. The test signal
level across the DUT depends on the test signal level, the source resistance of
the E4980A/AL, and the impedance of the DUT as follows.
Where,
Figure 7-6 Simplified model of test signal level and DUT
|Vosc| Signal voltage level of E4980A/AL
Rso Source resistance of E4980A/AL (= 100 )
|Vm| Signal voltage level applied on DUT
|Im| Signal current level flowed in DUT
|Zx| Impedance of DUT
Vm
Zx
Rso Zx+
-------------------------
Vosc=
Im
Vosc
Rso Zx+
-------------------------
=
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Zx
Vm
Im
Rso
Vosc
㪈㪇㪇㱅