1Electronic Attenuator - Rohde & Schwarz R&S FSP Series Operating Manual

R&S FSP
MIXER LOW The MIXER LOW NOISE softkey changes the operating point of the input mixer so
NOISE that (with the RF attenuation remaining the same) the inherent noise of the
R&S FSP is reduced compared to the default setup. If the softkey is enabled, the
R&S FSP has an improved dynamic range above 3 GHz.
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Remote command:
REF LEVEL The REF LEVEL POSITION softkey allows the reference level position to be
POSITION 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:
REF LEVEL
The REF LEVEL OFFSET softkey allows the arithmetic level offset to be entered.
OFFSET This offset is added to the measured level irrespective of the selected unit. The scal-
ing of the y-axis is changed accordingly.
The setting range is ±200 dB in 0.1 dB steps.
Remote command:
Remote command:
GRID The GRID (ABS REL) softkey switches between absolute and relative scaling of the
(ABS REL) level axis.
GRID ABS is the default setting.
ABS
REL
For setting RANGE LINEAR (linear scaling, labelling of axes in %) the softkey is not
displayed since the unit % itself implies a relative scale.
Remote command:
4.5.3.1 Electronic Attenuator
Besides the mechanical attenuator at the RF input, the R&S FSP also offers an
electronic attenuation setting (option ELECTRONIC ATTENUATOR R&S FSP-B25).
The attenuation range is 0 to 30 dB, with the default attenuation being preset by the
mechanical attenuator.
EL ATTEN The EL ATTEN MANUAL softkey switches the electronic attenuator on and allows
MANUAL the attenuation of the electronic attenuator to be set.
Operating Manual 1164.4556.12 - 06
The function is available for models 13, 30 and 40.
The modified operating point of the input mixer will be effective only if the start
frequency of the R&S FSP is ≥3 GHz.
In the default setting, the function is switched off.
The labelling of the level lines refers to the absolute value of the reference
level.
The upper line of the grid is always at 0 dB.
The scaling is in dB whereas the reference level is always in the set unit
(dBm, dBmV,..).
INP:ATT:AUTO:MODE LNO
DISP:WIND:TRAC:RPOS 100PCT
DISP:WIND:TRAC:RLEV:OFFS -10dB
DISP:WIND:TRAC:Y:MODE ABS
Instrument Functions
Analyzer Mode
4.17