Getting Started
R&S
®
FSPN
71
User Manual 1179.4363.02 ─ 01
2. Define the number of measurements to be performed in the "Sweep / Average
Count" input field, for example "10".
3. Start the measurement.
● In case of a single measurement, the application performs x measurements
over the frequency range you have defined. An average count of "10", for
example, would result in 10 measurements.
● In case of continuous measurements, the application performs a moving aver-
age over the average count.
How to smooth the trace by adjusting the number of XCORR operations
When you apply cross-correlation operations, the application is able to determine the
phase noise characteristics at a certain frequency offset more precisely.
The number of cross-correlation operations applied in each half decade depends on a
cross-correlation factor that you can define arbitrarily.
Cross-correlation operations are applied to all traces.
1. Enter the "Overview" dialog box, and from there, enter the "Noise Config" dialog
box.
2. Define the cross-correlation factor as required in the "XCORR Factor" input field.
The application calculates the number of cross-correlations for each half decade
based on this factor. You can see the resulting operations in the table of the "Noise
Config" dialog box.
The number of operations calculated for each half decade targets a similar mea-
surement time for all half decades, so that the measurement is done at roughly the
same time in each half decade.
You can also see the resulting number of operations in the green bar at the bottom
of the diagram area.
More information:
●
How to smooth the trace graphically
When you apply trace smoothing, the existing data remains the same. The trace is
smoothed by applying mathematical operations
Trace smoothing is applied to each trace individually.
1. Enter the "Overview" dialog box, and from there, enter the "Analysis" dialog box.
2. Select the vertical "Trace" tab, and then the horizontal "Traces" tab.
Trying Out the Instrument
