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Correcting for Measurement Errors
The
Local]
key provides access to the correction menu which leads to a series of menus that
implement the error-correction concepts described in this section. Accuracy enhancement
(error-correction) is performed as a calibration step before you measure a test device. When
the
(ETJ
key is pressed, the correction menu is displayed.
The following
softkeys
are located within the correction menu:
8
n
8
8
8
8
8
8
8
8
8
8
8
Ensuring a Valid Calibration
Unless interpolated error-correction is on, measurement calibrations are valid only for a
specific stimulus state, which must be set before a calibration has begun. The stimulus state
consists of the selected frequency range, number of points, sweep time, output power, and
sweep type. Changing the frequency range, number of points, or sweep type with correction
on invalidates the calibration and turns it off. Changing the sweep time or output power
changes the status notation Cor at the left of the screen to C?, to indicate that the calibration
is in question. If correction is turned off or in question after the stimulus changes are made,
-................
::.
:f...
::
pressing
~~~~~:~~:~~,
#$~
recalls
the original
stimulus
state for the current calibration.
6-76
Application and Operation Concepts