JBL AUTHENTICS L8 (serv.man3) EMC - CB Certificate ▷ View online
Report No.: EM201300471-4 Application No.:
ZJ00032008 Page 9 of 41
4. EMISSION TEST
4.1 CONDUCTED EMISSION MEASUREMENT
4.1.1 LIMITS
Frequency (MHz)
Quasi-peak（dBμV）
Average（dBμV）
0.15 ～ 0.5
66～56 56～46
0.5 ～ 5
56 46
5 ～ 30
60 50
NOTE:
(1) The lower limit shall apply at the transition frequencies.
(2) The limit decreases in line with the logarithm of the frequency in the range of 0.15 ～0.5 MHz.
4.1.2 TEST PROCEDURES
Procedure of Preliminary Test
For measurement of the disturbance voltage the equipment under test (EUT) is connected to
the power supply mains and any other extended network via one or more artificial network(s).
An EUT, whether intended to be grounded or not, and which is to be used on a table is
configured as follows:
– Either the bottom or the rear of the EUT shall be at a controlled distance of 40 cm from a
reference ground plane. This ground plane is normally the wall or floor of a shielded room. It
may also be a grounded metal plane of at least 2 m by 2 m. This is physically accomplished as
follows:
1) place the EUT on a table of non-conducting material which is at least 80 cm high. Place the
EUT so that it is 40 cm from the wall of the shielded room, or
2) place the EUT on a table of non-conducting material which is 40 cm high so that the
bottom of the EUT is 40 cm above the ground plane;
– All other conductive surfaces of the EUT shall be at least 80 cm from the reference ground
plane;
– The ANs are placed on the floor that one side of the AN housings is 40 cm from the
vertical reference ground plane and other metallic parts;
– Interconnecting cables that hang closer than 40 cm to the ground plane shall be folded
back and forth forming a bundle 30 cm to 40 cm long, hanging approximately in the middle
between the ground plane and the table.
– I/O cables that are connected to a peripheral shall be bundled in the centre. The end of the
cable may be terminated if required using correct terminating impedance. The total length
shall not exceed 1 m.
The test mode(s) described in Item 2.4 were scanned during the preliminary test. After the
preliminary scan, we found the test mode described in Item 2.4 producing the highest
emission level. The EUT configuration and cable configuration of the above highest emission
levels were recorded for reference of the final test.
Procedure of Final Test
EUT and support equipment were set up on the test bench as per the configuration with
highest emission level in the preliminary test. A scan was taken on both power lines,
For measurement of the disturbance voltage the equipment under test (EUT) is connected to
the power supply mains and any other extended network via one or more artificial network(s).
An EUT, whether intended to be grounded or not, and which is to be used on a table is
configured as follows:
– Either the bottom or the rear of the EUT shall be at a controlled distance of 40 cm from a
reference ground plane. This ground plane is normally the wall or floor of a shielded room. It
may also be a grounded metal plane of at least 2 m by 2 m. This is physically accomplished as
follows:
1) place the EUT on a table of non-conducting material which is at least 80 cm high. Place the
EUT so that it is 40 cm from the wall of the shielded room, or
2) place the EUT on a table of non-conducting material which is 40 cm high so that the
bottom of the EUT is 40 cm above the ground plane;
– All other conductive surfaces of the EUT shall be at least 80 cm from the reference ground
plane;
– The ANs are placed on the floor that one side of the AN housings is 40 cm from the
vertical reference ground plane and other metallic parts;
– Interconnecting cables that hang closer than 40 cm to the ground plane shall be folded
back and forth forming a bundle 30 cm to 40 cm long, hanging approximately in the middle
between the ground plane and the table.
– I/O cables that are connected to a peripheral shall be bundled in the centre. The end of the
cable may be terminated if required using correct terminating impedance. The total length
shall not exceed 1 m.
The test mode(s) described in Item 2.4 were scanned during the preliminary test. After the
preliminary scan, we found the test mode described in Item 2.4 producing the highest
emission level. The EUT configuration and cable configuration of the above highest emission
levels were recorded for reference of the final test.
Procedure of Final Test
EUT and support equipment were set up on the test bench as per the configuration with
highest emission level in the preliminary test. A scan was taken on both power lines,
Report No.: EM201300471-4 Application No.:
ZJ00032008 Page 10 of 41
recording at least the six highest emissions. Emission frequency and amplitude were recorded
into a computer in which correction factors were used to calculate the emission level and
compare reading to the applicable limit. The test data of the worst-case condition(s) was
recorded.
into a computer in which correction factors were used to calculate the emission level and
compare reading to the applicable limit. The test data of the worst-case condition(s) was
recorded.
4.1.3 TEST SETUP
Report No.: EM201300471-4 Application No.:
ZJ00032008 Page 11 of 41
4.1.4 TEST RESULTS
Project No.:
ZJ00032008
Probe:
L1
Standard:
(CE)EN55022 class B_QP
Power Source:
AC 230V/50Hz
Test item:
Conduction Test
Date:
2013-8-12
Temp./Hum.(%RH): 21/56%RH
Time:
14:43:06
EUT:
JBL AUTHENTICS L16
Model:
Mode 1: Audio in
Test Result:
Pass
Note:
No.
Frequency
Reading
Correct
Result
Limit
Margin
Remark
(MHz)
(dBuV)
Factor(dB)
(dBuV)
(dBuV)
(dB)
1 0.3940 42.09 0.51 42.60
57.98
-15.38
QP
2 0.3940 40.39 0.51 40.90
47.98 -7.08 AVG
3 1.1820 29.69 0.51 30.20
56.00
-25.80
QP
4 1.1820 24.99 0.51 25.50
46.00
-20.50 AVG
5 2.7620 34.10 0.70 34.80
56.00
-21.20
QP
6 2.7620 29.10 0.70 29.80
46.00
-16.20 AVG
7 8.3940 46.97 0.73 47.70
60.00
-12.30
QP
8 8.3940 38.37 0.73 39.10
50.00
-10.90 AVG
9 8.9340 45.61 0.79 46.40
60.00
-13.60
QP
10 8.9340 38.11 0.79 38.90 50.00 -11.10 AVG
11 16.0660 34.09 0.81 34.90 60.00 -25.10
11 16.0660 34.09 0.81 34.90 60.00 -25.10
QP
12 16.0660 28.69 0.81 29.50 50.00 -20.50
AVG
Report No.: EM201300471-4 Application No.:
ZJ00032008 Page 12 of 41
Project No.:
ZJ00032008
Probe:
N
Standard:
(CE)EN55022 class B_QP
Power Source:
AC 230V/50Hz
Test item:
Conduction Test
Date:
2013-8-12
Temp./Hum.(%RH): 21/56%RH
Time:
14:47:57
EUT:
JBL AUTHENTICS L16
Model:
Mode 1: Audio in
Test Result:
Pass
Note:
No.
Frequency
Reading
Correct
Result
Limit
Margin
Remark
(MHz)
(dBuV)
Factor(dB)
(dBuV)
(dBuV)
(dB)
1 0.3940 42.39 0.51 42.90
57.98
-15.08
QP
2 0.3940 40.89 0.51 41.40
47.98 -6.58 AVG
3 1.1820 29.79 0.51 30.30
56.00
-25.70
QP
4 1.1820 24.99 0.51 25.50
46.00
-20.50 AVG
5 1.9700 33.01 0.59 33.60
56.00
-22.40
QP
6 1.9700 28.51 0.59 29.10
46.00
-16.90 AVG
7 2.7620 34.90 0.70 35.60
56.00
-20.40
QP
8 2.7620 30.30 0.70 31.00
46.00
-15.00 AVG
9 4.3379 38.29 0.71 39.00
56.00
-17.00
QP
10 4.3379 32.69 0.71 33.40 46.00 -12.60 AVG
11 8.3779 47.17 0.73 47.90 60.00 -12.10
11 8.3779 47.17 0.73 47.90 60.00 -12.10
QP
12 8.3779 38.27 0.73 39.00 50.00 -11.00 AVG
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