User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
344User Manual 1178.3370.02 ─ 09
Adjusting all Determinable Settings Automatically (Auto All)
Activates all automatic adjustment functions for the current measurement settings.
This includes:
●
Auto Frequency
●
Auto Level
Remote command:
[SENSe:]ADJust:ALL on page 764
Adjusting the Center Frequency Automatically (Auto Frequency)
The R&S FPL1000 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.
The auto frequency function is not available if the tracking generator is active (see
"Tracking Generator Settings" on page 292).
This function is not available during signal tracking (see Chapter 7.4.3, "Keeping the
Center Frequency Stable - Signal Tracking", on page 306).
To set the optimal reference level, see "Setting the Reference Level Automatically
(Auto Level)" on page 312).
Remote command:
[SENSe:]ADJust:FREQuency on page 766
Setting the Reference Level Automatically (Auto Level)
Automatically determines a reference level which ensures that no overload occurs at
the R&S FPL1000 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 FPL1000.
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 345).
Remote command:
[SENSe:]ADJust:LEVel on page 766
Resetting the Automatic Measurement Time (Meastime Auto)
Resets the measurement duration for automatic settings to the default value.
(Spectrum application: 1 ms)
Remote command:
[SENSe:]ADJust:CONFigure:DURation:MODE on page 765
Adjusting Settings Automatically