Keysight Technologies CXA N9000B, Manual

Page: 16 / 88

16 N9069C Noise Figure Measurement Guide
Making Noise Figure Measurements
Making Basic Measurements
4. Configure the amplitude
parameters
— Press
AMPTD
, select the
Signal Path
tab, select
On
from the Internal
Preamp
drop down list.
— Press
MEAS SETUP
,
select the
Cal Setup
tab,
User Cal
, and set the
Min Atten
and
Max
Atten
values.
— Press
AMPTD
, select the
Attenuation
tab and set
the value used in the
measurement stage.
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.
The attenuation value used in the
measurement should be in the range of Min
Atten and Max Atten values.
5. Configure the frequency
parameters of the
measurement
— Press
FREQ, Freq Mode
,
and select
Swept
.
— Press
Start Freq
, and
enter
200 MHz
.
— Press
Stop Freq
, and
enter
400
,
MHz
.
— Press,
Points
, and enter
11
.
6. Select the ENR Mode
— Press
MEAS SETUP,
ENR
.
— In the ENR dialog, toggle
ENR Mode
to
Table
.
7. Configure the ENR table
— Toggle
Use Meas Table
Data for Cal
to
On
.
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.
— Press
Edit Meas Table
,
to view the ENR values
automatically loaded
from the SNS noise
source into the
instrument.
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 64 .
9. Set averaging
— Press
MEAS SETUP
,
Avg/Hold Num
and
enter
10
.
— Press
Averaging
and
toggle to
On
.
Step Action Notes