R&S FSPN, User Manual

Page: 119 / 555

Common Measurement Settings
R&S
®
FSPN
119 User Manual 1179.4363.02 ─ 01
6.5.5 Spot Noise Information
Access : "Overview" > "Noise Config" > "Spot Noise"
Spot noise is the phase noise measured at a certain offset frequency. The information
about spot noise is provided in the noise diagram (optionally) and in a separate spot
noise information table.
The R&S FSPN provides several features to control the spot noise information.
The remote commands required to configure spot noise measurements are described
in
Chapter 11.6.6.3, "Spot Noise Configuration" , on page 371.
Displaying spot noise information ................................................................................119
Selecting the spot noise positions ............................................................................... 119
Displaying spot noise information
By default, when you perform a measurement, the R&S FSPN displays the spot noise
information in the diagram area.
You can turn off the displayed spot noise information any time, for example if you want
a better view of the measurement results.
You can also select the trace the displayed spot noise information refers to from the
"Trace" dropdown menu.
Remote command:
DISPlay:SNINfo[:STATe]
on page 375
DISPlay:SNINfo:TRACe
on page 375
Selecting the spot noise positions
The R&S FSPN provides several methods to define the positions where the spot noise
is measured.
By default, it calculates the spot noise on all "Decade Edges" (10 x offset frequencies) in
the measurement range. Therefore, the number of spot noise results depends on the
measurement range.
If you want to evaluate the spot noise on positions other than the decade edges, you
can add "User Defined" spot noise positions. When you turn on that feature, changes
that you make to the "Offset" input fields are considered in the current measurement
(by default, user defined spot noise positions are the decade edges).
Noise Measurement Configuration