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R&S FSU
Y-AXIS MAX VALUE
Spectrum Analysis – MEAS Key
The Y-AXIS MAX VALUE softkey defines the upper limit of the displayed
probability range.
Values on the y-axis are normalized which means that the maximum value is
1.0. As the y-axis scaling has a logarithmic axis the distance between max and
min value must be at least one decade.
Remote command:
Y-AXIS MIN VALUE
CALC:STAT:SCAL:Y:UPP <value>
The Y-AXIS MIN VALUE softkey defines the lower limit of the displayed
probability range.
As the y-axis scaling has a logarithmic axis the distance between max and min
value must be at least one decade. Valid values are in the range 0 < value < 1.
Remote command:
ADJUST SETTINGS
CALC:STAT:SCAL:Y:LOW <value>
The ADJUST SETTINGS softkey optimizes the level settings of the R&S FSU
according to the measured peak power in order to gain maximum sensitivity of
the instrument.
The level range is adjusted according to the measured difference between peak
and minimum power for APD measurement and peak and mean power for
CCDF measurement in order to obtain maximum power resolution.
Additionally the probability scale is adapted to the selected number of samples.
Remote command:
DEFAULT SETTINGS
The DEFAULT SETTINGS softkey resets the x- and y-axis scalings to their
PRESET values.
•
x-axis ref level: -20 dBm
•
x-axis range APD: 100 dB
•
x-axis range CCDF: 20 dB
•
y-axis upper limit: 1.0
•
y-axis lower limit: 1E-6
Remote command:
ADJUST SETTINGS
CONT MEAS
CALC:STAT:PRES
see “ADJUST SETTINGS” on page 4.125
The CONT MEAS softkey starts collecting a new sequence of sample data and
calculating the APD or CCDF curve depending on the selected measurement.
The next measurement is started automatically as soon as the indicated
number of samples has been reached ("CONTinuous MEASurement").
Remote command:
1166.1725.12
CALC:STAT:SCAL:AUTO ONCE
INIT:CONT ON;
INIT:IMM
4.125
E-2