Test Signal Level; Test Signal Level Across The Dut - Keysight E4980A User Manual

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
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,
|Vosc|
Rso
|Vm|
|Im|
|Zx|
Figure 7-6 Simplified model of test signal level and DUT
Keysight E4980A/AL Precision LCR Meter
shows a simplified model of the E4980A/AL and a DUT. The test signal
Vm
Signal voltage level of E4980A/AL
Source resistance of E4980A/AL (= 100 )
Signal voltage level applied on DUT
Signal current level flowed in DUT
Impedance of DUT
Rso
Vosc
Zx
Vosc

------------------------ -
=
Rso Zx
+
Vosc
Im
------------------------ -
=
Rso Zx
+
Zx
Vm
Im
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