The Spectrum Application (RF Measurements)
R&S
®
FPL1000
330
User Manual 1178.3370.02 ─ 11
All values from 101 to 100001 can be set. The default value is 1001 sweep points.
For EMI measurements, 200001 sweep points are available.
Remote command:
[SENSe:]SWEep[:WINDow<n>]:POINts
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 6-21: Optimization parameters in FFT mode
Optimization mode
Description
Dynamic
Optimizes the dynamic range by using the narrowest possible subspan (depending
on the RBW).
Speed
Optimizes the sweep rate by using the widest possible subspan (depending on the
RBW).
It is recommended that you set the
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.
Zero span mode
For zero span measurements, the optimization mode defines the selection of the A/D
converter prefilter.
Table 6-22: 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:
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.
FFT Subspans
Indicates the number of FFT subspans required to cover the entire measurement
range (read-only). See also
Only available in FFT sweep mode in the Spectrum application, and not for SEM,
ACLR, or Spurious emissions measurements.
Remote command:
Bandwidth, Filter and Sweep Configuration
