Common Measurement Settings
R&S
®
FSVA3000/ R&S
®
FSV3000
371
User Manual 1178.8520.02 ─ 01
Remote command:
Setting the Reference Level Automatically ( Auto Level ) ← Reference 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 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
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 )"
Remote command:
RF Attenuation
Defines the attenuation applied to the RF input of the R&S
FSV/A.
Attenuation Mode / Value ← RF Attenuation
The RF attenuation can be set automatically as a function of the selected reference
level (Auto mode). This ensures that no overload occurs at the RF Input connector for
the current reference level. It is the default setting.
By default and when no (optional)
is available, mechanical
attenuation is applied.
In "Manual" mode, you can set the RF attenuation in 1 dB steps (down to 0
dB). Other
entries are rounded to the next integer value. The range is specified in the data sheet.
If the defined reference level cannot be set for the defined RF attenuation, the refer-
ence level is adjusted accordingly and the warning "limit reached" is displayed.
NOTICE!
Risk of hardware damage due to high power levels. When decreasing the
attenuation manually, ensure that the power level does not exceed the maximum level
allowed at the RF input, as an overload may lead to hardware damage.
For details, see
Chapter 8.4.1.2, "RF Attenuation"
Remote command:
Using Electronic Attenuation
If the (optional) Electronic Attenuation hardware is installed on the R&S
FSV/A, you
can also activate an electronic attenuator.
In "Auto" mode, the settings are defined automatically; in "Manual" mode, you can
define the mechanical and electronic attenuation separately.
Amplitude and Vertical Axis Configuration
