Keysight Technologies C Series - Page 686

684 Keysight N9915-90020 User’s Guide
Noise Figure Mode (Option 356)
How to Define a Noise Figure Measurement
——Off | Γ| sets the Off value (cold) of the ENR spot
value’s 50
Ω match, Γ (0.000 to 1.000).
——
ENR Uncert. Cov. [2σ] Opens a menu to set the
value of the ENR uncertainty coverage.
Then choose:
1σ, 2σ (default), or 3σ.
——
More opens additional ENR Spot Value softkey
menu choices
——
Γ Spec. Style [Fixed] Opens a menu of softkeys
to set the Γ specification style.
Then choose
Maximum, 95th %ile (default), 80th
%ile, Median, Mean, or Fixed (Default == Fixed).
——
Γ Distribution [Rayleigh] Opens a menu of
softkeys to set the type of Γ distribution.
Then select
Rayleigh (default), Fixed, or Uniform
in Circle.
—
ENR Table Edit/Save/Recall Opens the ENR table menu to
edit, save, or recall noise source values (Active when ENR
Mode set to Table).
Then choose:
——
Edit ENR Table Opens the currently selected
table of noise source values (generic default
noise source values are populated for quick
check). Enter your noise source’s values for more
accurate measurements.
——New ENR Table opens a new ENR table for
entering and saving additional noise source
values.
——Save ENR Table Opens a menu of softkeys to
enable you to enter a unique noise source
filename.
IMPORTANT! Save your noise source table with a unique filename to avoid
loss of table data. All noise figure files are saved with *.enr type suffixes.
The FieldFox displays Replace existing file?, because the displayed
default filename is the one last saved. Enter a unique filename to avoid
loss of table data (i.e., all noise figure files are saved with *.enr type
suffixes).