R&S FSW-K7 User Manual page 94

®
R&S FSW-K7
●
dBμA
●
dBpW
●
Volt
●
Ampere
●
Watt
Remote command:
INPut:IMPedance
CALCulate<n>:UNIT:POWer
Setting the Reference Level Automatically (Auto Level) ← Reference Level
Automatically determines a reference level which ensures that no overload occurs at
the R&S FSW for the current input data. At the same time, the internal attenuators and
the preamplifier (for analog baseband input: the full scale level) are adjusted so the sig-
nal-to-noise ratio is optimized, while signal compression and clipping are minimized.
Automatically determines a reference level which ensures that no overload occurs at
the R&S FSW 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 clip-
ping are minimized.
To determine the required reference level, a level measurement is performed on the
R&S FSW.
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.
When using the optional 2 GHz bandwidth extension (R&S FSW-B2000), the level
measurement is performed on the connected oscilloscope. Y-axis scaling on the oscil-
loscope is limited to a minimum of 5mV per division.
You can change the measurement time for the level measurement if necessary (see
"Changing the Automatic Measurement Time (Meastime Manual)"
Remote command:
[SENSe:]ADJust:LEVel
Full Scale Level Mode / Value
The full scale level defines the maximum power you can input at the Baseband Input
connector without clipping the signal.
The full scale level can be defined automatically according to the reference level, or
manually.
For manual input, the following values can be selected:
●
0.25 V
●
0.5 V
●
1 V
●
2 V
If probes are connected, the possible full scale values are adapted according to the
probe's attenuation and maximum allowed power.
For details on probes, see the R&S FSW I/Q Analyzer and I/Q Input User Manual.
User Manual 1173.9240.02 ─ 23
on page 191
on page 244
on page 286
Configuration
Input and Frontend Settings
on page 131).
94