Keysight Technologies C Series User Manual page 681

Noise Figure Mode (Option 356)
Using Noise Figure
Figure 29-9 Smart Noise Source – Source Menus
Keysight N9915-90020 User's Guide
ENR Mode: Smart (Auto) only:
– T value gets
cold
automatically loaded into
FieldFox when the USB Noise
Source is connected.
– This value is applied as the
Default value for T Cold
menu.
– If not in Smart (Auto) mode,
the T Cold value gets set to
Default: 296.5 K.
679