Keysight Technologies FieldFox A Series, User Manual

Page: 559 / 756

Keysight N9927-90001 User’s Guide 559
Noise Figure Mode (Option 356 – CPU2 Only)
How to Define a Noise Figure Measurement
— Integration or
Opens a menu of softkeys to define the Integration’s Mode Auto or
Fixed and Jitter values.
Then choose:
— Mode Auto Fixed Select Auto (default) to let the FieldFox
select the optimum coupled instrument settings. Changes
can be made to the Jitter Goal and Max Time/Pt. values.
When integration Mode is set to Fixed, the Time/Pt.
softkey is active and can be modified.
— JItter Goal Sets the maximum peak-to-peak jitter value.
Values greater than this value triggers the Jitter Warning
(i.e., if Jitter Warning = ON). (Only active when
Mode = Auto.) (Default is 0.5 dB.)
— Max Time/Pt. Sets the maximum amount of time the jitter
is measured at a given point to attempt to reach the Jitter
Goal value (i.e., the measurement time per point is
automatically adjusted to the minimum time required, but
will never exceed the displayed Max Time/Pt.). After this
time, values in excess of the jitter Goal value trigger the
Jitter Warning.
— Jitter Warning Enables/Disables the Jitter Warning. The
Jitter Warning displays when the Jitter value exceeds the
Jitter Goal value. (Default = ON.)
— Time/Pt. Sets the Time/Pt. when Mode is set to Fixed.
(Only active when Mode = Fixed.)
— Back to return to previous menu.
— Uncertainty
Opens a menu of uncertainty softkeys for setting the DUT, Preamp,
and Uncert. Contributions.
Then choose:
— DUT Sets the DUT Mode to either Spot (default) or Table.
Then choose:
—— DUT Mode Set to Spot (default) or to Table
For DUT MODE Spot choose:
For optimum speed and performance measurement results, it is
recommended that auto-integration is used in all noise figure
measurements
.