User Manual

Page 17 of 40
Audix Technology (Wujiang) Co., Ltd. EMC Dept. Report No.: ACWE-F2101012
AUDIX GROUP
5.3. Power-line Conducted Emission Limits
 For FCC §15.107 and ICES-003 §6.1
Frequency Range
(MHz)
Class A Limits
Class B Limits
Quasi Peak
dB(V)
Average
dB(V)
Quasi Peak
dB(V)
Average
dB(V)
0.15 – 0.50
79
66
66 – 56*
56 – 46*
0.50 – 5.0
73
60
56
46
5.0 – 30
60
50
Note: * Decreases with the logarithm of the frequency.
5.4. Measurement Procedure
The power-line conducted emission measurement was performed in accordance with
the procedure of ANSI C63.4-2014 clause 7.3.
 Setup the EUT and associated equipment described as section 4.1, and they were
located 40cm from the vertical conducting plane.
 Connect the EUT power cord to the main A.M.N and other peripheral devices were
powered by AC mains through the second Line Impedance Stabilization Network
(L.I.S.N.). For the measurement, the A.M.N. measuring port was terminated by a 50Ω
measuring equipment and the second L.I.S.N. measuring port was terminated by a
50Ω resistive load.
 Setup the resolution bandwidth of the test receiver at 9kHz (while testing within 0.15
to 30MHz).
 Operate the EUT system as described in section 4.2.
 Both sides of A.C. line were checked for maximum conducted interference. In order to
find the maximum emission, all of the interconnecting cables were manipulated.
 For the exploratory measurement, determine the highest emission amplitude relative
to the limit on each of the EUT power cord with the peak detector by each of the EUT
operation over the specified frequency range and record it.
 For final measurement, select the EUT operation mode that produced the highest
amplitude in the exploratory measurement to determine the highest emissions with
each specified detector and record it. All of the current-carrying conductors of each of
the EUT power cords, except the ground conductor, must be measured over the spec-
ified frequency range.
 The measurement result was calculated by following formula:
Emission Level = Reading (Receiver) + A.M.N Factor (dB) + Cable Loss
(Cable loss includes Pulse Att + Switch + Cable)
 If the average limit is met when using a Quasi-Peak detector receiver, the EUT is
deemed to meet both limits and measurement with the average detector is unneces-
sary.