Hi all,

Question:
IF the EUT Mains conducted emissions Quasi-peak levels are under the CISPR
14-1 Quasi-peak limit (CISPR 14-1 Table 5), when measured with a CISPR
16-1-1 compliant EMI receiver, is the click procedure/assesment deemed to
be complied with, or not?
In other words, is there in a PASS case still the need to go through the
very complicated procedures detailed in sections 4.4, Fig.6 (Flow diagram)
and Annex C of CISSPR 14-1 for determining, analyzing, measuring and
assessing compliance of clicks ?

Going through CISPR 14-1 (2016 ed.):
Section 4.4.1 says: "Discontinuous disturbances shall be assessed WHEN they
exceed the limits for continuous disturbances,.."
Click definition in sec.3.3.3: "discontinuous disturbance, the amplitude of
which exceeds the quasi-peak limit for continuous disturbance, the duration
of which is NOT LONGER than 200 ms and which is separated from a subsequent
disturbance by at least 200 ms,..."

Now, the charge/discharge times of a Band B (150k-30M) QP receiver =
1msec/160msec, so a click lasting less than 160msec (see click examples in
Fig.2 of CISPR 14-1) yet exceeding the QP limit might NOT be picked up by
the QP receiver during a standard mains conducted EMI measurement..here is
the origin of my doubts.

Thanks in advance for any feedback
Paolo

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