Keysight Technologies N9040B UXA Manual page 16

Making Noise Figure Measurements
Making Basic Measurements
Step
4. Configure the amplitude
parameters
5. Configure the frequency
parameters of the
measurement
6. Select the ENR Mode
7. Configure the ENR table
8. View ENR values
ENR values
are retained
in the
analyzer memory until a different
SNS is plugged in or the ENR
table is manually edited.
9. Set averaging
16
Action
AMPTD
— Press , select the
Signal Path
tab, select
On
from the Internal
Preamp
drop down list.
MEAS SETUP
— Press
Cal Setup
select the
User Cal
, and set the
Min Atten Max
and
Atten
values.
AMPTD
— Press , select the
Attenuation
tab and set
the value used in the
measurement stage.
FREQ, Freq Mode
— Press
Swept
and select .
Start Freq
— Press , and
200 MHz
enter .
Stop Freq
— Press , and
400 MHz
enter , .
Points
— Press, , and enter
11
.
MEAS SETUP,
— Press
ENR
.
— In the ENR dialog, toggle
ENR Mode Table
to
Use Meas Table
— Toggle
Data for Cal On
to .
Ed it Meas Table
— Press
to view the ENR values
automatically loaded
from the SNS noise
source into the
instrument.
MEAS SETUP
— Press
Avg/Hold Num
and
10
enter .
Averaging
— Press and
On
toggle to .
Notes
When you enter the Noise Figure Mode, the
internal preamplifier automatically turns
on.If an external U7227 Preamplifier is
connected, the internal preamplifier turns off
to avoid overloads.
,
tab,
The attenuation value used in the
measurement should be in the range of Min
Atten and Max Atten values.
,
.
If you are using other noise sources, for
,
example, the Keysight 346B noise source,
you need to enter the ENR values manually.
For more information about entering the
ENR data, refer to "Entering Excess
Noise Ratio (ENR) Data" on page
,
N9069C Noise Figure Measurement Guide
64.