Remote Commands
R&S
®
FSW
841User Manual 1173.9411.02 ─ 19
Table 11-3: 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 sweep time to "Auto" to optimize the sweep rate
(see [SENSe:]SWEep:TIME:AUTO on page 842).
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 activated to obtain the
best control range for the A/D converter.
Note: FFT mode and external mixers (R&S FSW-B21)
The partial span optimization modes "Dynamic" and "Auto" include automatic suppres-
sion of unwanted mixing products. Thus, when using external mixers (R&S FSW-B21),
use the "Speed" mode to obtain similar results in FFT mode as in frequency sweep
mode.
Zero span mode
For zero span measurements, the optimization mode defines the selection of the A/D
converter prefilter.
Table 11-4: 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.
Note: EMI measurements
For EMI measurements (using R&S FSW-K54), "Dynamic" mode is not supported.
"Auto" mode always uses "Speed" optimization.
Parameters:
<Mode> *RST: AUTO
Example:
SWE:OPT DYN
Selects optimization for dynamic range.
Manual operation: See "Optimization" on page 413
[SENSe:]SWEep:POINts <SweepPoints>
This command defines the number of measurement points analyzed during a sweep.
Setting Basic Measurement Parameters
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