R&S FSPN - Page 156

Common Analysis and Display Functions
R&S
®
FSPN
156User Manual 1179.4363.02 ─ 01
traces in the diagram: One for the phase noise, one for the AM noise and the third
showing the sum of the phase noise and AM noise (PN + AM).
Functions in the "Traces" dialog box described elsewhere:
●
"Hiding spurs" on page 120
The remote commands required to configure traces are described in Chapter 11.7.3.1,
"Trace Characteristics", on page 413.
Trace 1 / Trace 2 / Trace 3 / Trace 4 / Trace 5 / Trace 6
Selects the corresponding trace for configuration. The currently selected trace is high-
lighted.
Remote command:
Selected via numeric suffix of:TRACe<1...6> commands
DISPlay[:WINDow<n>][:SUBWindow<w>]:TRACe<t>[:STATe] on page 416
Trace Mode
Defines the update mode for subsequent traces.
For details, see Chapter 7.3.1.1, "Analyzing Several Traces - Trace Mode",
on page 152.
"Clear/ Write"
Overwrite mode (default): the trace is overwritten by each measure-
ment.
"Max Hold"
The maximum value is determined over several measurements and
displayed. The R&S FSPN saves each trace point in the trace mem-
ory only if the new value is greater than the previous one.
"Min Hold"
The minimum value is determined from several measurements and
displayed. The R&S FSPN saves each trace point in the trace mem-
ory only if the new value is lower than the previous one.
"Average"
The average is formed over several measurements.
"View"
The current contents of the trace memory are frozen and displayed.
"Blank"
Removes the selected trace from the display.
"Write Hold"
The trace is overwritten when new data is available, but only after all
cross-correlation operations defined for a half decade are done. (Or
when the trace cannot be improved further when "XCORR Optimiza-
tion" is on).
Example: 100 cross-correlation operations are defined for a half dec-
ade. The trace is updated when all 100 cross-correlations are done,
not after each individual cross-correlation operation.
Remote command:
DISPlay[:WINDow<n>]:TRACe<t>:MODE on page 413
Selecting the displayed result
The R&S FSPN supports several noise characteristics that you can assign to a trace
and thus display in the diagram.
●
"Phase Noise"
Shows the measured phase noise characteristics.
●
"AM Noise"
Trace Configuration