556 Keysight N9927-90001 User’s Guide
Noise Figure Mode (Option 356 – CPU2 Only)
How to Define a Noise Figure Measurement
— Gain Specify Gain or
— Noise Temperature
Specify Noise Temperature or
— YFactor
Specify Y-Factor
29 Then modify the settings based on the selected noise figure type
2. Select Measure Setup
—choose:
— Noise Source
or “DUT or” on page 558, “Integration or” on
page 559, or “Uncertainty
” on page 559.
Opens a menu of softkeys to define the Noise Figure’s ENR Mode
Spot or Table and uncertainty values.
Then choose:
— ENR Mode Spot Table
You can enter ENR data for the
noise source you are using as a table of values or as a
single spot value. The values held in the table can be used
for measurements at a range of frequencies as well as at a
fixed frequency.
The single spot value is used either for measurements at a
single frequency, or for measurements across a range of
frequencies that is narrow enough such that the ENR value
does not change significantly across that range. (Default is
Table).
— ENR Spot Values
Opens a menu to enter a spot value
either for measurements at a single frequency or for
measurements across a range of frequencies that is narrow
enough such that the ENR value does not change
significantly across that range (Inactive with ENR Mode set
to Table).
Then choose:
——ENR
sets the ENR spot value in dB (default is
15 dB).
——ENR Uncert.
sets the ENR spot uncertainty value
in dB (default is 0.000 dB).
——On |
Γ| sets the On value (hot) of the ENR spot
value’s 50
Ω match, Γ (0.000 to 1.000).
——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. [2
σ] Opens a menu to set the
value of the ENR uncertainty coverage.
Then choose: 1
σ, 2σ (default), or 3σ.
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