Keysight N9927-90001 User’s Guide 141
Calibration for NA, CAT, and VVM Modes
CalReady Properties
There are several factory calibrations (CalReady) on every FieldFox. These can
be selected based on the type of DUT that you measure most often, and the
compromise that you prefer to make between measurement speed versus
measurement accuracy. Remember, CalReady was performed at the test ports.
Therefore, a CalReady calibration is most accurate when the DUT is directly
connected to the test ports. Learn more in “CalReady” on page 123.
This setting does NOT survive Preset or Power ON/OFF.
—Press Cal 5
then More
—Then press CalReady
to toggle between the following selections:
— 2-Port Cal
(default) Corrects all four S-parameters. Requires a
forward and reverse sweep, which causes slower trace
measurements. Learn why in “Calibration Type” on page 134.
— Enh. Response
Corrects forward (S21 and S11) and reverse (S12 and
S22) measurements separately. Therefore, when measurements in
only one direction are required, this choice provides faster trace
measurements than a full 2-port cal. Also choose an Enhanced
Response Optimization. Learn more in “Enhanced Response
Optimization” on page 139.
To find the best choice for your DUT:
—Press Preset
then Preset.
— Select the appropriate S-Parameter and other settings (frequency range,
resolution, and so forth).
—Press Trace 6
then Math and Memory then Data->Mem.
—Press Data & Memory
.
—Press Cal 5
then More
— Select a CalReady Cal to compare with the current setting.
—Press Esc
to exit the cal menu.
— View the differences in the two traces.
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