Common Measurement Settings
R&S
®
FSPN
129User Manual 1179.4363.02 ─ 01
Remote command:
Start (VCO Characteristics): CONFigure:VCO:SWEep:STARt on page 381
Stop (VCO Characteristics): CONFigure:VCO:SWEep:STOP on page 382
Points (VCO Characteristics): CONFigure:VCO:SWEep:POINts on page 381
Start (Spot Noise vs Tune): CONFigure:SNTune:SWEep:STARt on page 384
Stop (Spot Noise vs Tune): CONFigure:SNTune:SWEep:STOP on page 384
Points (Spot Noise vs Tune): CONFigure:SNTune:SWEep:POINts on page 383
Defining the settling time
When you apply a different tuning voltage (or current) to the DUT, it usually needs
some time before its characteristics become stable. This time period is the settling
time.
●
The "Settling Time / Meas Point" property defines for how long you allow the DUT
to settle, before the characteristics for each applied voltage or current are mea-
sured.
●
The "Initial Settling Time" property defines for how long you allow the DUT to settle,
before the characteristics of the first applied voltage or current of the tuning range
are measured.
Remote command:
Settling time (VCO Characterization): CONFigure:VCO:SWEep:DELay[:POINt]
on page 380
Settling time (Spot Noise vs Tune): CONFigure:SNTune:SWEep:DELay[:POINt]
on page 383
Initial settling time (VCO characterization): CONFigure:VCO:SWEep:DELay:
INITial on page 380
Initial settling time (Spot Noise vs Tune): CONFigure:SNTune:SWEep:DELay:
INITial on page 382
Selecting the frequency resolution
The "Frequency Resolution" defines the accuracy with which the frequency of the DUT
is measured on each measurement point.
Note that only discrete values for the frequency resolution are supported. If you enter a
frequency resolution that is not supported, the next available frequency resolution is
selected. For example, if you enter 200 Hz, which is not supported, the R&S FSPN
selects 1 kHz instead.
Remote command:
CONFigure:VCO:SWEep:FCOunter:RESolution on page 380
6.7.2 Trace Configuration
In the VCO characterization measurement, you can select the Trace Mode for each
trace.
Traces in the Harmonic Power result display
In the Harmonic Power result display, each trace represents the power of one har-
monic.
VCO Characterization Configuration
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