Configuration
R&S
®
FSWP
67User Manual 1177.5856.02 ─ 07
Adjusting the Center Frequency Automatically ( Auto Frequency )
The R&S FSWP adjusts the center frequency automatically.
The optimum center frequency is the frequency with the highest S/N ratio in the fre-
quency span. As this function uses the signal counter, it is intended for use with sinus-
oidal signals.
Remote command:
[SENSe:]ADJust:FREQuency on page 139
Setting the Reference Level Automatically ( Auto Level )
Automatically determines a reference level which ensures that no overload occurs at
the R&S FSWP for the current input data. At the same time, the internal attenuators
are adjusted so the signal-to-noise ratio is optimized, while signal compression and
clipping are minimized.
To determine the required reference level, a level measurement is performed on the
R&S FSWP.
If necessary, you can optimize the reference level further. Decrease the attenuation
level manually to the lowest possible value before an overload occurs, then decrease
the reference level in the same way.
You can change the measurement time for the level measurement if necessary (see "
Changing the Automatic Measurement Time ( Meastime Manual )" on page 67).
Remote command:
[SENSe:]ADJust:LEVel on page 139
Resetting the Automatic Measurement Time ( Meastime Auto )
Resets the measurement duration for automatic settings to the default value.
Remote command:
[SENSe:]ADJust:CONFigure:DURation:MODE on page 137
Changing the Automatic Measurement Time ( Meastime Manual )
This function allows you to change the measurement duration for automatic setting
adjustments. Enter the value in seconds.
Note: The maximum possible measurement duration depends on the currently
selected measurement and the installed (optional) hardware. Thus, the measurement
duration actually used to determine the automatic settings may be shorter than the
value you define here.
Remote command:
[SENSe:]ADJust:CONFigure:DURation:MODE on page 137
[SENSe:]ADJust:CONFigure:DURation on page 137
Upper Level Hysteresis
When the reference level is adjusted automatically using the Auto Level function, the
internal attenuators and the preamplifier are also adjusted. To avoid frequent adapta-
tion due to small changes in the input signal, you can define a hysteresis. This setting
defines an upper threshold the signal must exceed (compared to the last measure-
ment) before the reference level is adapted automatically.
Adjusting Settings Automatically
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