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Basic Operations for RF Devices Measurement
STEP 6. Fixture Compensation
Validating Fixture Compensation Data
Upon completion of all fixture compensation data, you should use the E4991A to calculate
the fixture compensation coefficient from the measured fixture compensation data. The
coefficient is automatically saved to the internal memory.
Step 1. Confirm that all compensation data measurement is completed and then press the
Step 2. Verify that the display below the
the status bar on the bottom of the screen changes to "Comp ON" (Figure 3-53).
Checking SHORT Compensation Data
After completing the fixture compensation, use the marker function to check that the
SHORT compensation data has been measured correctly.
Step 1. Press the
measurement parameter |Z| (in this example it is Trace 1) as the active trace (* marker).
When the parameter |Z| does not exist in the measurement parameter as in measurement
conditions (3) and (4), perform the check after converting the measurement parameter of
Trace 1 to the parameter |Z|. After the check, return it to the previous measurement
parameter.
Step 2. Press the
to move the cursor to the
Figure 3-57
Step 2
Step 3. Press the
Step 4. Press the
Step 5. Turn the rotary knob (
values of measurement parameter |Z| (Figure 3-56: 2) are equal to or less than 50 mΩ for
all stimulus values (Figure 3-56: 1). If not, place the short device on both electrodes again,
align the location of the test fixture's pressure rod, and repeat the fixture compensation.
NOTE
When changing the location of the pressure rod after performing fixture compensation, you
must again obtain the fixture compensation data.
80
key to move the cursor to the
key in the MEASUREMENT block to specify the trace of the
[Trace]
key in the MEASUREMENT block. Then press the
[Scale]
Autoscale
key in the MEASUREMENT block.
[Marker]
or
key to move the cursor to the
key (Figure 3-56).
) in the ENTRY/NAVIGATION block to check that trace
button and press the
Done
button changes to
Comp Menu
button and press the
Stimulus
or
key (Figure 3-52).
and the display of
[ON]
or
key
key (Figure 3-57).
box and then press the
Chapter 3
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