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FSP
Configuration/Setup
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.
SETUP menu:
PREAMP
The PREAMP softkey switches the preamplifier on 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 is 20 dB.
IEC/IEEE-bus command: INP:GAIN 0DB
Note:
The PREAMP softkey is only available with option EL.
ATTENUATOR (FSP-B25) .
Transducer
Activating Transducer Factors
The TRANSDUCER softkey opens a submenu enabling the user to activate or deactivate defined
transducer factors, to generate new transducer factors or to edit existing 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 FSP and the transducer
used are regarded as one measuring instrument. Only if the transducer has the unit dB, will the unit
originally set on the FSP be maintained and can be changed.
If a transducer factor is active, the remark TDF appears in the Enhancement Labels column.
After all transducers have been switched off, the 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 measurement during the sweep. If the sweep range
changes, the correction values are calculated 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.
1164.4556.12
4.18-3
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