AFJ Instruments LT32C/10 Panduan Pengoperasian - Halaman 8
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Halaman CetakA.3 • CONSTRUCTION
The assignment of the Line Impedance Stabilization Network is to give defined load impedance for
the measurement of the device under test (DUT).
A further task of the LISN is the separation of the DUT from the mains concerning the high frequency
interference's.
Therefore the construction of the LISN LT32C/10 has a simulation impedance of:
The term in brackets is the impedance of the LISN.
The 50 Ohms in parallel is the input impedance of the measuring device.
The value is defined in the regulation CISPR 16-1-2 (Fig. A.1).
Because of the common connection of the four simulations impedances (L1, L2, L3, N) to
Earth/Ground, the LISN is a V-type and just to use for measuring of non-symmetrical interferences.
To avoid to take an effect from one line to the other the simulation impedances are high frequency
separated.
Fig. A.1: Example of artificial mains (50 µH + 5 Ω) // 50 Ω V-network (single phase)
AFJ LT32C/10 LISN - Operating Manual - rev. 3.8 / 2019-01
(50µH + 5 Ohm) // 50 Ohm.
EUT
EUT
EUT
EUT
Distributed by:
Reliant EMC LLC
3311 Lewis Ave, Signal Hill CA 90755,
408-916-5750, www.reliantemc.com
Measuring Receiver
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