The Spectrum Application (RF Measurements)
R&S
®
FPL1000
400
User Manual 1178.3370.02 ─ 03
For spectrogram displays, the sweep count determines how many sweeps are com-
bined in one frame in the spectrogram; that is: how many sweeps the R&S
FPL1000
performs to plot one trace in the spectrogram result display. For more details, see
Remote command:
Sweep Points
Defines the number of measured values to be collected during one sweep.
For details see
Chapter 7.6.1.8, "How Much Data is Measured: Sweep Points and
All values from 101 to 100001 can be set. The default value is 1001 sweep points.
Remote command:
Optimization
In FFT mode, several FFT analysis steps are required to cover the entire measurement
span. The span which is covered by one FFT analysis step is called
partial span
. The
partial span cannot be defined directly, but it can be optimized according to measure-
ment requirements.
Table 7-17: Optimization parameters in FFT mode
Optimization mode
Description
Dynamic
Optimizes the dynamic range by using the narrowest possible partial span (depend-
ing on the RBW).
The autorange function for the internal IF gain calculation is activated to obtain the
best control range for the A/D converter.
Speed
Optimizes the sweep rate by using the widest possible partial span (depending on
the RBW).
The autorange function for the internal IF gain calculation is deactivated. (Note: set
the reference level accordingly to optimize the control range for the A/D converter).
It is recommended that you set the
to "Auto" to optimize the sweep
rate.
Auto
Uses a medium-sized partial span to obtain a compromise between a large dynamic
range and a fast sweep rate.
The autorange function for the internal IF gain calculation is deactivated. (Note: set
the reference level accordingly to optimize the control range for the A/D converter).
Zero span mode
For zero span measurements, the optimization mode defines the selection of the A/D
converter prefilter.
Bandwidth, Filter and Sweep Configuration
