NARDA PMM L3-100, User Manual

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1-2 General Information
1-3 PMM Artificial Mains
Networks for
“CURRENT
INJECTION” test
As described above, a LISN is primarily a probe to take out RF signals.
Some particular EMC recommendations might require that Device Under
Test shall be proven to conducted EMC immunity in the range 10 kHz – 30
MHz, by injecting on the supply lines certain RF interference and checking
the DUT’s response.
PMM LISNs may be used also to this purpose by injecting a RF signal into
the RF output connector on the front panel.
The following figure shows the CISPR equivalent circuit.
Fig. 1-1 CISPR équivalent circuit
50
µ
H
5
Ω
Ri 50
Ω
Connection to D.U.T.
GROUND
Ri = input impedance of the RFI
CISPR equivalent circuit