R&S 1322.8003K06, User Manual

Page: 89 / 555

Measurements and Result Displays
R&S
®
FSPN
89 User Manual 1179.4363.02 ─ 01
The unit of the y-axis depends on which version of the "Noise Spectrum" diagram you
have selected.
●
"Noise Spectrum": Default display showing the single sideband phase noise with
linear y-axis in dBc/Hz.
●
"Noise Spectrum L(f)": Same as the "Noise Spectrum" without AM noise calcula-
tion.
●
"Noise Spectrum S
Φ
(f)": Display showing the spectral density of phase fluctuations
with linear y-axis in dB/Hz.
●
"Noise Spectrum Sv(f)": Display showing the spectral density of frequency fluctua-
tions with logarithmic y-axis in Hz/sqrt(Hz).
●
"Noise Spectrum Sy(f)": Display showing the spectral density of fractional fre-
quency fluctuations with logarithmic y-axis in 1/sqrt(Hz).
The R&S
FSPN adjusts numerical results like integrated measurements and spot
noise accordingly. AM noise calculation is only supported by the "Noise Spectrum"
result display.
The scale of the y-axis is variable. Usually it is best to use the automatic scaling that
the application provides, because it makes sure that the whole trace is always visible.
You can, however, also customize the range, the minimum and the maximum values
on the y-axis by changing the y-axis scale.
The measurement results are displayed as traces in the diagram area. Up to six active
traces at any time are possible. Each of those can have a different setup and thus
show different aspects of the measurement results.
In the default state, the application shows two traces. A yellow one and a blue one.
Both result from the same measurement data, but have been evaluated differently. On
the first trace, smoothing has been applied, the second one shows the raw data.
The diagram also contains a grey area in its default state. This trace represents the
cross-correlation gain indicator .
Remote command:
TRACe<n>[:DATA]?
on page 333
TRACe<n>[:DATA]:X?
on page 335
TRACe<n>[:DATA]:X:POINts?
on page 335
TRACe<n>[:DATA]:Y?
on page 336
TRACe<n>[:DATA]:Y:POINts?
on page 336
Integrated Measurements
The "Integrated Measurements" result display summarizes the residual effects results
in a table.
The table consists of up to four rows with each row representing a different integration
interval. Each row basically contains the same information, which depends on the
residual effects configuration .
Result Description
Wnd Shows the number of the measurement window the
integration is done in (usually "1", unless you have
several noise diagrams open at the same time).
Range Shows the index of the integration range (1 to 4).
Result Displays