R&S FSW-K7 User Manual page 131

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R&S FSW-K7
Setting the Reference Level Automatically (Auto Level)
Automatically determines a reference level which ensures that no overload occurs at
the R&S FSW for the current input data. At the same time, the internal attenuators and
the preamplifier (for analog baseband input: the full scale level) are adjusted so the sig-
nal-to-noise ratio is optimized, while signal compression and clipping are minimized.
Automatically determines a reference level which ensures that no overload occurs at
the R&S FSW 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 clip-
ping are minimized.
To determine the required reference level, a level measurement is performed on the
R&S FSW.
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.
When using the optional 2 GHz bandwidth extension (R&S FSW-B2000), the level
measurement is performed on the connected oscilloscope. Y-axis scaling on the oscil-
loscope is limited to a minimum of 5mV per division.
You can change the measurement time for the level measurement if necessary (see
"Changing the Automatic Measurement Time (Meastime Manual)"
Remote command:
[SENSe:]ADJust:LEVel
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
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.
Remote command:
[SENSe:]ADJust:CONFigure:DURation:MODE
[SENSe:]ADJust:CONFigure:DURation
Upper Level Hysteresis
When the reference level is adjusted automatically using 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 a lower threshold the signal must fall below (compared to the last measure-
ment) before the reference level is adapted automatically.
Remote command:
[SENSe:]ADJust:CONFigure:HYSTeresis:UPPer
User Manual 1173.9240.02 ─ 23
on page 286
on page 284
Configuration
Automatic Settings
on page 131).
on page 284
on page 284
Auto Level function, the
on page 285
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