R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
RF ATTEN
AUTO
NOISE CORR
(ON OFF)
REF LEVEL
POSITION
REF LEVEL
OFFSET
Analyzer Mode
The attenuation can be set in 5 dB steps between 0 and 75 dB.
Other entries will be rounded to the next higher integer value.
If the defined reference level cannot be set for the given RF attenuation, the reference
level will be adjusted accordingly and the warning "Limit reached" will be output.
The 0 dB value can be entered only via the numeric keypad in order to protect the
input mixer against accidental overload.
Remote command: INP:ATT 40 DB
The RF ATTEN AUTO softkey sets the RF attenuation automatically as a function of
the selected reference level.
This ensures that the optimum RF attenuation desired by the user is always used.
RF ATTEN AUTO is the default setting.
Remote command: INP:ATT:AUTO ON
If active, the R&S FSQ corrects the results by its inherent noise. Noise correction
increases the dynamic range.
After you activate noise correction, the R&S FSQ performs a reference measurement
of its inherent noise. In the actual measurement, the R&S FSQ then substracts
the noise power from the power in the channel that is measured.
The inherent noise depends on the center frequency, resolution bandwidth and level
setting. Therefore, the R&S FSQ deactivates noise correction if you change one
these parameters. The R&S FSQ shows a message that noise correction is inactive.
The R&S FSQ also deactivates noise correction after you select another measurement
(e.g. channel power, spectrum emission mask etc.).
After the R&S FSQ deactivates noise correction, you have to activate it again manually.
The R&S FSQ performs a new reference measurement.
Remote command: POW:NCOR ON
The REF LEVEL POSITION softkey allows the reference level position to be
entered.
The setting range is from -200 to +200%, 0% corresponding to the lower and 100%
to the upper limit of the diagram.
Remote command: DISP:WIND:TRAC:RPOS 100PCT
The REF LEVEL OFFSET softkey allows the arithmetic level offset to be entered.
This offset is added to the measured level irrespective of the selected unit. The scaling
of the y-axis is changed accordingly.
The setting range is ±200 dB in 0.1 dB steps.
Remote command: DISP:WIND:TRAC:RLEV:OFFS -10dB
Operating Manual 1313.9681.12 - 01 4.17