Keysight N9913B, User Manual

Page: 675 / 896

Keysight N9938-90006 User’s Guide 675
Noise Figure Mode (Option 356)
How to Define a Noise Figure Measurement
b. Then modify the settings based on the selected noise figure type
2. Select Measure Setup —choose:
— Noise Source or “ DUT or” on page 678 , “ Integration or” on
page 678 , or “ Uncertainty ” on page 679 .
Opens a menu of softkeys to define the Noise Figure’s ENR Mode
Smart (Smart Source), Spot, and Table and uncertainty values.
To learn more, refer to Figure 29-8 on page 670 , Figure 29-9 on
page 671 , and Figure 29-10 on page 672 .
Then choose:
— ENR Mode [Table] then choose from:
—— Spot You can enter ENR data for the noise source
you are using as a single spot value.
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 == Spot) .
—— Smart (Auto) The FieldFox checks for a valid USB
noise source and automatically loads any ENR
and calibration values. And, automatically loads
a T Cold value from the USB Noise Source,
measured in Kelvin .
—— Table Y ou can enter ENR data for the noise
source you are using as a table of values. The
values held in the table can be used for
measurements at a range of frequencies as well
as at a fixed frequenc y.
— 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 (Active when ENR Mode set
to Spot).
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).