General Instrument Setup
R&S
®
FPL1000
524
User Manual 1178.3370.02 ─ 09
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.
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
FPL1000 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
maintained and can be changed.
When all transducers have been switched off, the R&S
FPL1000 returns to the unit that
was used before a transducer was activated.
Configuration
The R&S
FPL1000 supports transducer lines with a maximum of 1001 data points.
Eight of the transducer lines stored in the instrument can be activated simultaneously.
The number of transducer lines stored in the instrument is only limited by the capacity
of the storage device used.
A transducer line consists of the following data:
●
A maximum of 1001 data points with a position and value
●
A unit for the values
●
A name to distinguish the transducer lines
Validity
The transducer factors must comply with the following rules to ensure correct opera-
tion:
●
The frequencies for the data points must always be defined in ascending order.
Otherwise the entry will not be accepted and an error message is displayed.
●
The frequencies of the data points may exceed the valid frequency range of the
R&S
FPL1000 since only the set frequency range is taken into account for mea-
Transducers
