Configuration
R&S
®
FSWP
50User Manual 1177.5856.02 ─ 07
Attenuation Mode / Value
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.
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.
Remote command:
INPut<ip>:ATTenuation on page 113
INPut<ip>:ATTenuation:AUTO on page 114
Optimization
Selects the priority for signal processing after the RF attenuation has been applied.
"Low distor-
tion"
(Default:) Optimized for low distortion by avoiding intermodulation
"Low noise"
Optimized for high sensitivity and low noise levels
If this setting is selected, "Low noise" is indicated in the channel infor-
mation bar.
Remote command:
INPut<ip>:ATTenuation:AUTO:MODE on page 114
Preamplifier
If the (optional) internal preamplifier hardware is installed, a preamplifier can be activa-
ted for the RF input signal.
You can use a preamplifier to analyze signals from DUTs with low output power.
For R&S FSWP8 and R&S FSWP26, the following settings are available:
"Off"
Deactivates the preamplifier.
"15 dB"
The RF input signal is amplified by about 15 dB.
"30 dB"
The RF input signal is amplified by about 30 dB.
For R&S FSWP50, the input signal is amplified by 30 dB if the preamplifier is activated.
Remote command:
INPut<ip>:GAIN:STATe on page 114
INPut<ip>:GAIN[:VALue] on page 115
Noise Cancellation
The R&S FSWP can correct the results by removing the inherent noise of the analyzer,
which increases the dynamic range.
In this case, a reference measurement of the inherent noise of the analyzer is carried
out. The measured noise power is then subtracted from the power in the channel that
is being analyzed (first active trace only).
Configuring the Amplitude
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