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Service
Operation Check
Short Impedance Check
Upon completion of the open impedance check, carry out a short impedance
check with the fixture set for the SHORT state.
Step 1. At the DUT measuring position, connect an appropriate shorting bar with the
electrode to secure the fixture for the SHORT state. (See
page
Step 2. Make the settings for the 4291B as follow.
Table 6-6
Settings for the Measuring Instrument (Keysight 4291B)
Measuring Cond ition
Measurement parameter
Start frequency
Stop frequency
OSC Level
Number of points
Point averaging factor
Points averaging
Step 3. Under this condition, measure Ls at 100MHz and 1GHz, separately.
Step 4. Confirm that the Ls value is within the typical range shown in
Table 6-7
SHORT Impedance Check: Typical
Parameter
Ls
Ls
Short-impedance Measurement Repeatability Check
Repeat short impedance measurement to check for the repeatability of
measurement.
Step 1. Upon completion of the short impedance check, disconnect the shorting bar
and connect it again with the electrode.
Step 2. Under the same measuring conditions as given above, measure Ls again at
100MHz and 1GHz, separately.
Step 3. Confirm that the Ls value is within the typical range shown in
70
37).
Frequency
100MHz
1GHz
a. The values given above are common to shorting bars of all sizes.
Figure 3-16 on
Setting
Ls
100MHz
1GHz
0.5V
2
16
ON
Typical (Absolute value)
2.3nH ± 1nH
2.3nH ± 1nH
Keysight16197A Operation and Service Manual
Table 6-7
a
a
Table
6-7.
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