General instrument setup
R&S
®
FSVA3000/ R&S
®
FSV3000
712
User Manual 1178.8520.02 ─ 08
7. To exit the toolbar edit mode, select "More icons" > "Stop Editing".
The red highlighting is removed. Selecting an icon performs the assigned function
as usual.
10.5
Transducers
10.5.1
Basics on transducer factors
The transducer allows you to manipulate the trace at discrete trace points to correct
the signal coming from an input device. Transducers are often used to correct the fre-
quency response for antennas, for example. The transducer is configured by defining
transducer factors for specific trace points. A set of transducer factors defines an inter-
polated transducer line and can be stored on the instrument.
In the Spectrum application, the correction factor from all active transducers is calcula-
ted for each displayed trace point once in advance and is added to the result of the
level measurement during the sweep. If the sweep range changes, the correction val-
ues are calculated again. If several measured values are combined in one point, only
one value is taken into consideration. If the active transducer line is not defined for the
entire sweep range, the missing values are replaced by zeroes.
When a transducer is used, the trace is shifted by a calculated factor. However, an
upward shift reduces the dynamic range for the displayed values. Thus, the reference
level can be adapted automatically to restore the original dynamic range. The refer-
ence level is shifted by the maximum transducer factor. By default, if transducers are
active the reference level function is adapted automatically to obtain the best dynamic
performance.
If a transducer factor is active, "TDF" is displayed in the channel bar.
Transducers can also be defined when an optional external mixer is used (R&S
FSV3-
B21).
(See the R&S
FSV/A I/Q Analyzer and I/Q Input User Manual.)
Input from I/Q data files is imported as it was stored, including any correction factors,
for example from transducers. Any currently configured correction factors at the time of
import, however, are not applied.
Y-Axis Unit
The individual transducer factors can be defined as absolute values or relative (dB)
values. However, all factors for one transducer line use the same unit. 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 amplitude settings since the
R&S
FSV/A and the active transducer are regarded as one measuring instrument. Only
for relative transducer factors (unit dB), the unit originally set on the instrument is main-
tained and can be changed.
Transducers
