User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
327User Manual 1178.3370.02 ─ 09
Remote command:
[SENSe:]SWEep[:WINDow<n>]:POINts on page 774
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 subspan. The sub-
span cannot be defined directly, but it can be optimized according to measurement
requirements.
Table 7-21: Optimization parameters in FFT mode
Optimization mode Description
Dynamic Optimizes the dynamic range by using the narrowest possible subspan (depending
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 subspan (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 Sweep Time to "Auto" to optimize the sweep
rate.
Auto Uses a medium-sized subspan 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.
Table 7-22: Optimization parameters in zero span mode
Optimization mode Description
Dynamic The narrowest filter possible (depending on the RBW) is used.
Speed The widest filter possible (depending on the RBW) is used.
Auto A medium-sized prefilter is used.
Remote command:
[SENSe:]SWEep:OPTimize on page 773
Sweep Type
The R&S FPL1000 automatically sets the optimal sweep type for the current measure-
ment (sweep or FFT). The sweep type cannot be defined manually.
Single Sweep / Run Single
After triggering, starts the number of sweeps set in "Sweep Count". The measurement
stops after the defined number of sweeps has been performed.
Bandwidth, Filter and Sweep Configuration