Keysight Technologies X Series Service Manual page 85

Instrument Messages
Advisory Messages
Detector <X> changed due to physical
constraints
FFT Width is not settable unless Sweep
Type is set to FFT
Sweep Setup is not available in Zero
Span
Cal Invalid: meas freq pt(s) > 3.6GHz
are > 50MHz from existing Cal pts
Keysight N9010A EXA Service Guide
You have selected more detectors than the instrument hardware
can implement. An existing detector selection has been changed
to allow the current detector choice to be selected.
<X> indicates the trace number for which the detector was
changed.
You must select the FFT sweep type before you can set the FFT
Width
Zero span is a display at a single frequency, so there is no
"sweeping" to set up.
When freq points being measured are above 3.6 GHz and a
calibration has been successfully performed, and the number of
points are changed, the new points are required to be within 50
MHz of the current cal points or the preselector optimize
frequencies become inaccurate and the whole cal needs to be
invalidated. Interpolation of the cal can only be performed if the
new freq points are within 50 MHz of the cal points. To overcome
this problem, change the number of freq points back to match cal
points or perform another user cal.
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