Keysight Technologies 16197A, Operation And Service Manual

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Keysight16197A Operation and Service Manual 47
User Maintenance
Deterioration Check
Deterioration Check
A deterioration check must be performed to determine the state of
deterioration of the fixture and to confirm whether the fixture is providing the
required measurement accuracy. The deterioration check comprises three
operations: “Setting user limit values,” “Acquiring Reference Values”“Electrode
Deterioration Check” . In the deterioration check, the impedance values (Rs, Ls)
of the fixture itself are measured at a discretionary frequency. It is
recommended to use the frequency at which the fixture is normally used.
Perform “Setting user limit values” in the following cases:
— When using the fixture for the first time after delivery
— When changing the required measurement accuracy
Perform
“Acquiring Reference Values” in the following cases:
— When using the fixture for the first time after delivery
— After replacing parts
Perform
“Electrode Deterioration Check” in the following cases:
— Once a day, and before conducting fixture compensation
Example Settings of User Limit Values
User limit values for the deterioration check should be set appropriately
according to the type of DUT, required measurement accuracy, and so on.
Example settings of user limit values are shown below.
To evaluate an inductor (L:10nH, Q:10) at a frequency (f) of 100 MHz
with a measurement accuracy of around 20%:
The reactance X and resistance R of the inductor under the above-mentioned
conditions can be obtained as follows:
L: 10nH
Q: 10
Frequency: 100MHz
Required measurement accuracy: 20% for both L and Q
R X Q

0.6

= =
X 2

fL 6

= =