In message
<OFD7811909.ED5ACDC0-ON88257BE8.0071ED63-88257BE8.00729F29@US.Schneider-E
lectric.com>, dated Mon, 16 Sep 2013, "McDiarmid, Ralph"
<[email protected]> writes:
Given a need to measure conducted emissions from 150kHz down to 9kHz,
would it be better to:
1. characterise 50ohm LISN for insertion loss down to 9kHz
2. use a current clamp rated for that frequency and use transfer
impedance to determine dB(uV)
I can see that impedance of 50ohm/50uH LISN could be an issue at
frequencies < 100kHz approx.
There is a CISPR standard LISN for 9 kHz to 150 kHz, specified in 4.2 of
CISPR 16-1-2, and Annex A:
4.2 50 ohm/50 μH + 5 ohm artificial mains V-network (for use in the
frequency range 9 kHz to 150 kHz)
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
If dictionaries were correct, we would only need one, because they would all
give the same information.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
-
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