Keysight N9938-90003 User’s Guide 93
Calibration for NA, CAT, and VVM Modes
—Press Start Calibration.
— Follow the Cal Wizard prompts. Connect the specified standard at the point
where the DUT will be connected, then press Measure
.
— At any time, press Back
to re-measure a standard if you feel it was not
properly connected.
—Press Finish
to complete the calibration.
CAL ON U
is shown on the screen for all displayed measurements that are
corrected with the Mechanical Cal.
ECal
ECal is a complete solid-state calibration solution. Every ECal module contains
electronic standards that are automatically switched into position during a
calibration. These electronic standards have been measured at the factory and
the data stored within the memory of the ECal module. The FieldFox uses this
stored data, along with the measured data, to calculate the error terms for a
measurement calibration.
You can perform the following calibrations with ECal:
— 1-Port Reflection calibration
If an error appears (“Failure to compute calibration steps…”), check to
ensure that the frequency range of the Cal Kit covers the frequency range
of the measurement. You can verify the frequency range of your Cal Kit at:
www.keysight.com/find/fieldfoxsupport. Click Cal Kits.
ECals each have a recommended input power level. Depending on the
measurement setup, the FieldFox may default to an input power level that
exceeds your ECal’s recommended input power level. Refer to the
reference guide for your ECal module to determine the correct input power
levels. Exceeding an ECal’s recommended input power level results in a
compression and an invalid data condition. Refer to
www.keysight.com/find/ecal.
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