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1-Port (OSL)
Interpolation *
Highest measurement accuracy is achieved when the frequency range or
resolution settings remain the same during the measurement as when the
FieldFox was calibrated. If these settings change after performing a calibration,
the FieldFox will interpolate the calibration so that VERY accurate
measurements continue to be made.
Interpolated Calibrations are only slightly less accurate than a calibration
performed at the measurement settings. Learn more about the relative accuracy
of FieldFox calibrations on page 61.
When a calibration that you performed is being interpolated, an asterisk is added
to the Cal annotation. For example:
current Response or Mechanical cal is being interpolated. An
a CalRdy.
Cal ON ? – Questionable Accuracy
When the Output Power, Interference Rejection, or IF BW (NA Mode ONLY)
setting is changed AFTER performing a calibration, a question mark is added to
the Cal annotation. For example:
current QuickCal is being interpolated. An
The resulting measurement accuracy depends on how much the setting has
changed. For highest accuracy, recalibrate using the new settings.
Compatible Mode Calibrations
The FieldFox can have only ONE calibration present for all modes (except
CalReady). Calibrating in one mode will overwrite calibrations for other modes.
Because NA, CAT, and VVM modes are very similar, a calibration that is
performed in one mode can also be applied in the other modes.
To apply a Cal, select a mode that is different from the mode in which the Cal
was performed. Then press Cal 5 then
Save the Calibration
After performing any type of calibration, you can save the FieldFox settings
along with the calibration into a STATE (*.sta) file. These settings and calibration
can then be recalled as necessary. To learn how, see Saving and Recalling Files
on page 86.
Calibration for NA, CAT, and VVM Modes
DUT: Not Applicable
S-parameters Corrected: S11 or S22
Standards: OPEN, SHORT, LOAD
Sweeps in ONE direction.
is shown on the screen when the
Cal ON U*
Q?. is shown on the screen when the
Cal ON
is never added to CalRdy.
?
Cal ON.
*
is never added to
59
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