LISN connecting power leads to power mains

Q.  How does the Line Impedance Stabilization Network (LISN) permit the connection of power leads of test items to the power mains?
- Published on 25 Sep 15

a. By passing only AC or DC power to the test sample
b. By blocking the power mains R-F from coupling into the test sample
c. By forbidding the test sample's electromagnetic noise from getting back into the power bus
d. All of the above

ANSWER: All of the above

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    Discussion

  • Satyawati Patil   -Posted on 06 Oct 15
    The main purpose of LISN is to provide the stabilized impedance to conducted emissions without getting interrupted from the normal power flow required by EUT.

    LISN is a buffer network which allows the connection of power leads of the test item to the power mains. This connection is possible by the passage of only AC or DC power to the test sample.

    Prevention of test sample's electromagnetic noise from reverting back into the power bus is also another way of LISN connection. This connectivity can also be provided by blocking the power mains R-F from coupling into the test sample.

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