Keysight N9938-90003 User’s Guide 95
Calibration for NA, CAT, and VVM Modes
— Allow the module to warm up until it indicates READY. This may take several
minutes.
— Connect the ECal module ports to the FieldFox at the calibration reference
plane (where the DUT will be connected).
—Press Cal 5
to start the Calibration.
—Press Mechanical Cal / ECal
—Press Change DUT Connectors. For each test port to be calibrated, select
the Connector Type and Gender of the DUT / ECal module. The connected
ECal module and relevant User Characterizations will appear, with the ECal
factory default as the default Cal Kit.
— Optionally press Advanced
then ECal Auto Orient.
— ON
(default) The FieldFox automatically senses the direction in which
the ECal module ports are connected to the FieldFox ports.
— OFF
If power to the ECal module is too low, it cannot detect which
FieldFox ports it is connected to. If you are having this problem,
select OFF. Then during the calibration, the FieldFox will prompt you
to connect the ECal module ports to specific FieldFox ports.
— Optionally press Advanced
then Extended Cal (N995xB/6xB Only).
— ON
The FieldFox Extended Cal measures additional points outside
the current frequency range in order to enable adjusting the
frequency range after the calibration procedure. With these extra
points, the error correction may be applied when it otherwise might
not. Without extended cal, if you adjust your frequency outside the
calibrated range after the calibration has been completed, the error
correction is turned off.
— OFF
(default) The FieldFox does not measure any frequency points
outside the current displayed frequency range. If the frequency is
adjusted outside of the set of points calibrated the error correction is
turned off and the following message is displayed:
"Error correction disabled. Stimulus outside
calibrated range."
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