Configuration/Setup R&S ESCI
1166.6004.12 4.208 E-3
Using Transducers
A transducer is often connected ahead of R&S ESCI both during the measurement of useful signals and
EMI and converts the useful or interference variable such as field strength, current or RFI voltage into a
voltage across 50 Ohm.
Transducers such as antennas, probes or current probes mostly have a frequency-dependent
transducer factor which can be stored in R&S ESCI and automatically has the correct unit during level
measurement.
If a transducer is switched on it is considered as part of the unit during the measurement, ie the
measured values are displayed in the correct unit and magnitude. When working with two measurement
windows, the transducer is always assigned to two windows.
R&S ESCI distinguishes between transducer factor and transducer set. A transducer factor takes the
frequency response of a single transfer element, eg an antenna into consideration. A transducer set can
summarize different transducer factors in several subranges (several transducer factors at the same
time), eg an antenna, a cable and a diplexer.
A transducer factor consists of max. 50 reference values defined with frequency, transducer factor and
the unit. For the measurement between frequency values linear or logarithmic interpolation of the
transducer factor can be chosen.
Several factors can be compiled in a transducer set provided that all factors have the same unit or unit
"dB". The frequency range covered by a set can be subdivided into max. 10 subranges (each with up to
4 transducer factors) which follow each other without a gap, ie the stop frequency of a subrange is the
start frequency of the next subrange.
The transducer factors used in a subrange have to fully cover the subrange.
The definition of a transducer set is recommended if different transducers are used in the frequency
range to be measured or if a cable attenuation or an amplifier has to be taken into consideration.
If a transducer set is defined during a frequency sweep, the latter can be stopped at the interface
between two transducer ranges and the user is asked to exchange the transducer.
The following message informs the user that the limit has been reached:
TDS Range # reached, CONTINUE / BREAK
He can continue the sweep by confirming the message (CONTINUE) or he can switch off the transducer
(BREAK).
With the automatic switchover of the transducer used, the frequency sweep is not interrupted.
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