Rohde & Schwarz FSV3000, User Manual

Page: 458 / 1489

Common measurement settings
R&S
®
FSVA3000/ R&S
®
FSV3000
458 User Manual 1178.8520.02 ─ 08
●
Watt
Additional units available only for installed R&S FSV3-K54 (EMI measurements)
option. The "dBx/MHz" units are normalized to the pulse bandwidth and intended to be
used only for EMI and EMC measurements. They are not suitable to measure power
densities in the spectrum application.
●
dBmV/MHz (normalized to 1 MHz)
●
dBµV/MHz (normalized to 1 MHz)
●
dBµV/mMHz (normalized to 1 MHz)
(only available for active transducers with dBµV/m values)
●
dBµA/MHz (normalized to 1 MHz)
●
dBµA/mMHz (normalized to 1 MHz)
(only available for active transducers with dBµA/m values)
●
dBpW/MHz (normalized to 1 MHz)
Remote command:
INPut<ip>:IMPedance
on page 1038
CALCulate<n>:UNIT:POWer
on page 1116
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. 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
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). Automatic attenuation 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) electronic attenuation 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.
Amplitude and vertical axis configuration