Rohde & Schwarz R&S FSP Series, Operating Manual

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Operating Manual 1164.4556.12 - 06 4.167
R&S FSP Instrument Functions
Basic Settings
4.6.3.2 External Noise Source
NOISE SRC
(ON OFF) The NOISE SRC (ON OFF) softkey switches on or off the supply voltage for an
external noise source which is connected to the NOISE SOURCE connector on the
rear panel of the instrument.
Remote command:
DIAG:SERV:NSO ON
4.6.3.3 RF Preamplifier
To improve the noise figure, a low-noise preamplifier with variable gain at the RF
input can be switched into the signal path.
PREAMP The PREAMP softkey switches the preamplifier on or off and activates the entry of
the preamplifier gain. The preamplifier is switched off by pressing the softkey again.
The only possible value with option el. attenuator (B25) is 20 dB.
Remote command:
INP:GAIN:STAT ON
'Switches the 20 dB preamplifier on.
4.6.3.4 Transducer
Activating Transducer Factors
The TRANSDUCER softkey opens a submenu enabling the user to activate or deac-
tivate defined transducer factors, to generate new transducer factors or to edit exist-
ing ones. A table with the transducer factors defined is displayed.
As soon as a transducer is activated, the unit of the transducer is automatically used
for all the level settings and outputs. The unit cannot be changed in the
AMPT menu
since the R&S FSP and the transducer used are regarded as one measuring instru-
ment. Only if the transducer has the unit dB, will the unit originally set on the
R&S FSP be maintained and can be changed.
If a transducer factor is active, TDF is displayed in the enhancement labels column.
After all transducers have been switched off, the R&S FSP returns to the unit that
was used before a transducer was activated.
In the analyzer mode, an active transducer for a sweep is calculated once in
advance for every point displayed and is added to the result of the level measure-
ment during the sweep. If the sweep range changes, the correction values are cal-
culated again. If several measured values are combined, only one value is taken
into consideration.
If the active transducer factor is not defined for the entire sweep range, the values
missing are replaced by zeroes.
TRANSDUCER The TRANSDUCER softkey opens a submenu for editing existing transducer factors
or creating new transducer factors.
The PREAMP softkey is only available with option el. attenuator (B25).
TRANSDUCER FACTOR