Ronde & Schwarz 1304.0004K03, User Manual

Page: 315 / 1071

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
315 User Manual 1178.3370.02 ─ 11
●
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 780
CALCulate<n>:UNIT:POWer
on page 766
Setting the Reference Level Automatically (Auto Level) ← Reference 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. 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
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 348).
Remote command:
[SENSe:]ADJust:LEVel
on page 756
Attenuation Mode / Value
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.
In "Manual" mode, you can set the RF attenuation in 5 dB steps down to 0 dB (with
option R&S FPL1-B22: in 1 dB steps). 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 reference 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 can lead to hardware damage.
For details, see
Chapter 6.5.1.2, "RF Attenuation" , on page 312.
Remote command:
INPut<ip>:ATTenuation
on page 767
INPut<ip>:ATTenuation:AUTO
on page 768
Impedance
For some measurements, the reference impedance for the measured levels of the
R&S
FPL1000 can be set to 50
Ω
or 75
Ω
.
Amplitude and Vertical Axis Configuration