Keysight E4980A/AL Precision LCR Meter 197
Measurement Procedure and Examples
Test Signal Level
7-
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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