R&S FPC Series User Manual

The Spectrum Application
R&S
®
FPC
111User Manual 1178.4130.02 ─ 07
In continuous mode, the R&S FPC repeats the measurement of the selected span over
and over until you stop it deliberately. The measurement results are updated accord-
ingly.
In single sweep mode, the R&S FPC measures the frequency spectrum once and then
stops without updating the results any longer. Another measurement starts only when
you deliberately initiate it. Note that in case of the average trace mode, a single sweep
can consist of several measurements - when these are done, the measurement stops.
Selecting the sweep mode
1. Press the "Sweep" key to open the sweep menu.
2. Select the "Continuous Sweep" menu item.
The R&S FPC starts a continuous measurement of the selected span.
You can interrupt a continuous measurement by selecting the "Continuous Sweep"
menu item again.
3. Select the "Single Sweep" menu item.
The R&S FPC starts a single measurement of the selected span.
14.6.3 Sweep Type
The sweep type defines the way how the R&S FPC captures and processes the data.
The sweep type also has an effect on the measurement speed.
Selecting the sweep type
1. Press the "Setup" key to open the setup menu.
2. Select the "User Preference" menu item.
3. Select the "Sweep / FFT Mode" menu item in the "Spectrum" category.
4. Select the sweep type from the dropdown menu.
The appropriate sweep type for your measurement setup depends on the span,
RBW, VBW and sweep time settings.
● "Auto"
The R&S FPC automatically selects the fastest sweep type for the current mea-
surement configuration.
● "Always Sweep"
The R&S FPC uses the local oscillator to provide the spectrum quasi analog
from the start to the stop frequency (analog sweep).
● "Prefer FFT"
The R&S FPC samples the signal levels over time on a defined frequency
value and transforms it to the spectrum by fast Fourier transformation (FFT).
Note that an FFT sweep is not possible under the following circumstances:
●
For measurements in the time domain (zero span).
Sweep Configuration

R&S FPC Series Specifications

General

Brand	R&S
Model	FPC Series
Category	Measuring Instruments
Language	English