B.1 General
For high current loads, when the power distribution wiring is short or there is a dedicated return (as opposed to a structural return) laid along a high level line, etc., the 50 μH LISN specified for use in CE101, CE102 may no longer be suitable, and in this case, the 5 μH LlSN may be used for testing. The EUT Power Port Conducted Emission Alternative Method provided in this appendix may be used as an alternative to CE101, CE102, subject to the agreement of the ordering party.
B.2 Scope of application
Suitable for CE101 and CE102 testing.
B.3 Limit values
The frequency range of the limits is from 25 Hz to 10 MHz. where the limits from 25 Hz to 150 kHz are shown in Fig. B. l and the limits from 150 kHz to 10 MHz are the same as in Fig. 14.
For limits from 25Hz to 150kHz, the low end flat portion of each curve is for the load at a supply frequency of 1A. For higher currents, the low flat portion is shifted up 20lgI(math.) genusIis the RMS value of the load current in amperes. The upper frequency limit of the limit is 150kHz, and the size of the limit does not vary with current.The slope of the limit between 2kHz and 150kHz varies with current.
For AC loads, the sweep should start below 400 Hz in order to calculate relaxed limits for weekly 400 Hz fundamental currents, even if the AC limits start at the second harmonic.
Figure B. 1 CE101 Limits Applicable to 5 μH LlSN
a Below 2kHz, the limits are set at 20lg/ relaxation.I: Indicates the rms value of the steady state current.
B.4 Test methods
Except for replacing the 50 μH LlSN with 5 μH LlSN, the test method is the same as CE101 at 25 Hz~150 kHz, and the test method is the same as CE102 at 150 KHz~10 MHz.
B. 5 5μH LlSN block diagram and impedance
The 5 μH LlSN block diagram and impedance are shown in Figures B.2 and B.3, respectively.
Figure B.2 Block diagram of the 5 μH LlSN
Figure B. 3 5μH LISN impedance