Keysight FieldFox B Series User Manual page 697

Noise Figure Mode (Option 356)
How to Define a Noise Figure Measurement
Figure 29-22
DUT Type Loss Compensation
For all of the DUT Types (Amplifier, Downconverter, Upconverter, and
Multi-Stage Converter) the loss compensation, before the DUT (BeforeDUT)
and after the DUT (AfterDUT) can be enabled or disabled for loss and for
temperature.
Loss compensation can be used to compensate for double sidebands (DSB).
Loss compensation can be used in the case of DSB measurements to
compensate for the doubling of the measured noise level (i.e., 3.01 dB
increase). For all sideband cases you can enable or disable Loss (device loss)
and Temperature (device temperature). Refer to Figure 29-23 on page 698.
This section contains the following:
— Setting Meas Setup > DUT > Loss Compensation > Before DUT and After
DUT, see Figure 29-23 on page 698.
Keysight N9938-90006 User's Guide 697