R&S FSW Series, Руководство пользователя

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Measurements and Results
R&S
®
FSW
339 User Manual 1173.9411.02 ─ 43
7.13.3.4 Controlling V-Networks (LISN)
For measurements on power lines, the R&S FSW EMI measurement adds functionality
to control a line impedance stabilization network (LISN) directly. Thus you can deter-
mine the interference caused by power supplies and cables.
You can connect the LISN to the user port of the R&S FSW. Control cables for the vari-
ous LISNs are available as accessories. The R&S FSW then controls which phase of
the LISN is to be tested and outputs the information to the user port.
The R&S FSW EMI measurement supports several V-networks. For each type of net-
work, you can define the phase you want to test for interferences. The R&S FSW EMI
measurement allows you to test one phase at a time.
Table 7-20: Supported networks and phases
Network type Phases
Two-line V-networks
ESH3-Z5 N, L1
ENV216 N, L1
Four-line V-networks
ESH2-Z5 N, L1. L2, L3
ENV4200 N, L1. L2, L3
For the ENV216 network, a 150 kHz high pass filter is available to protect the input of
the R&S FSW.
7.13.3.5 Using Transducer Factors
The R&S FSW EMI measurement provides functionality to include transducer factors in
the test setup. Transducers are devices like antennas, probes or current probes that
are connected to the R&S
FSW to measure interferences or useful signals. The trans-
ducer converts the measured value such as field strength, current or RFI voltage into a
voltage across 50
Ω
. During the measurement, the transducer is considered a part of
the instrument.
A transducer usually has a frequency-dependent transducer factor that includes the
frequency response of the corresponding device. During level measurement, the trans-
ducer factor automatically converts the results into the correct unit and magnitude. A
transducer factor consists of a maximum of 1001 reference values. Each reference
value includes frequency, unit and level.
The R&S FSW EMI measurement adds several predefined transducer factors. In addi-
tion you can also create new and edit existing transducer factors.
For more information see Chapter 12.3.1, "Basics on Transducer Factors" ,
on page 675 .
Electromagnetic Interference (EMI) Measurement