Rohde & Schwarz FSV3000, User Manual

Page: 500 / 1489

Common measurement settings
R&S
®
FSVA3000/ R&S
®
FSV3000
500 User Manual 1178.8520.02 ─ 08
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.
At the same time, the optimal reference level is also set (see "Setting the Reference
Level Automatically (Auto Level)" on page 458).
This function is not available during signal tracking (see Chapter 6.3.3, "Keeping the
center frequency stable - signal tracking" , on page 451).
Remote command:
[SENSe:]ADJust:FREQuency
on page 1139
Setting the Reference Level Automatically (Auto Level)
Automatically determines a reference level which ensures that no overload occurs at
the R&S
FSV/A for the current input data. At the same time, the internal attenuators
are adjusted. As a result, the signal-to-noise ratio is optimized, while signal compres-
sion and clipping are minimized.
To determine the required reference level, a level measurement is performed on the
R&S
FSV/A.
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 500).
Remote command:
[SENSe:]ADJust:LEVel
on page 1139
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:LEVel:DURation:MODE
on page 1137
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 measurement duration depends on the currently selected mea-
surement and the installed (optional) hardware. Thus, the measurement duration
actually used to determine the automatic settings can be shorter than the value you
define here.
Remote command:
[SENSe:]ADJust:CONFigure:LEVel:DURation:MODE
on page 1137
[SENSe:]ADJust:CONFigure:LEVel:DURation
on page 1137
Adjusting settings automatically