Keysight Technologies CXA N9000B, Manual

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70 N9069C Noise Figure Measurement Guide
Measurement Related Tasks and Concepts
Setting the Signal Analyzer to Make a Measurement
Setting the Measurement Frequencies
Before you set the frequencies you want to measure, you need to select a
frequency mode. Three frequency modes are available when you press FREQ ,
Freq Mode :
— Swept — points are linearly distributed between the start and stop
frequencies, where the number of points is determined by the Points
parameter. The start frequency, stop frequency, center frequency, and span
parameters are coupled.The Fixed Freq key is unavailable in Swept mode.
— Fixed — a single frequency is measured. The start frequency, stop
frequency, center frequency, and span parameters are unavailable in Fixed
mode.
— List — a user-specified list of frequencies is measured. the list of frequencies
can be supplied using the respective SCPI commands, loading the
frequency list from a file, or by entering the data manually into the
frequency list.The start frequency, stop frequency, center frequency, span,
and sweep points parameters are unavailable in List mode.
Using Swept Frequency Mode
In swept frequency mode, you set the start and stop frequencies (or equivalent
center and span frequencies) over which the sweep is made. You also need to
set the number of measurement points. These measurement points are equally
spaced over the frequency span. The maximum number of points is 501 and
the default number of points is 11.
To make a measurement over a specific frequency range:
If you change the span after a calibration, and the calibration has been made over a narrower
frequency range, the calibration will become invalid. The Cal States are reported as follows:
UNCAL (red)– calibration is invalid
CAL (green)– calibration is valid
~CAL (yellow)– calibration is interpolated or adjusted for changes
Step Notes
1. Press
FREQ
,
Freq Mode
.
2. Select the Sweep mode.
3. Press
Start Freq
, enter the value and terminate it
using the unit menu
Press
Stop Freq
, enter the value and terminate it
using the unit menu
You can also use the
Center Freq
and the
Span
selections to set the desired values.
4. Press
Points
, enter the number of measurement
points and press
Enter
.