Read JBL AV1 (serv.man2) EMC - CB Certificate online
Report #70112.e1
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Littleton, MA 01460
Page 13 of 27
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3.2 Conducted
Emissions
3.2.1 Object
The purpose of this test is to measure the conducted electromagnetic emissions on the AC power
lines, pursuant to FCC part 15 and EN55022 Class B requirements. (See Table 3.2.1-1 for the
Class B conducted limits.)
lines, pursuant to FCC part 15 and EN55022 Class B requirements. (See Table 3.2.1-1 for the
Class B conducted limits.)
3.2.2 Procedure
Testing is performed in an Open Area Test Site. Equipment is arranged on the table as described
in section 3.1.2. Each individual current-carrying power lead shall be individually connected
through a 50
in section 3.1.2. Each individual current-carrying power lead shall be individually connected
through a 50
Ω/50µH Line Impedance Stabilization Network (LISN). A 2-meter x 2-meter vertical
coupling plane is placed 40 cm to the rear of the EUT. The EUT is set into operation such that all
parts of the system are exercised, while the RF voltages across the 50
parts of the system are exercised, while the RF voltages across the 50
Ω measuring port of the
LISN are recorded. The test is repeated for each current-carrying power line of the EUT.
3.2.3 Deviations from Test Method
None
3.2.4 Measurement
Uncertainty
A minimum of a 1 dB margin of compliance is recommended for conducted emissions data to
verify passing results. This is recommended to compensate for the measurement uncertainties
involved.
verify passing results. This is recommended to compensate for the measurement uncertainties
involved.
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