JBL SPARK (serv.man10) EMC - CB Certificate ▷ View online
Report No.: EM201300221-6
Application No.: ZJ00028648 Page 9 of 19
Procedure of Final Test
EUT and support equipment were set up on the turntable as per the configuration with highest
emission level in the preliminary test. The Analyzer / Receiver scanned from 30MHz to
1000MHz. Emissions were scanned and measured rotating the EUT to 360 degrees, varying
cable placement and positioning the antenna 1 to 4 meters above the ground plane, in both the
vertical and the horizontal polarization, to maximize the emission reading level. Record at
least six highest emissions. Emission frequency, amplitude, antenna position, polarization
and turntable position were recorded into a computer in which correction factors were used to
calculate the emission level and compare reading to the applicable limit and only QP reading
is presented. The test data of the worst-case condition(s) was recorded.
emission level in the preliminary test. The Analyzer / Receiver scanned from 30MHz to
1000MHz. Emissions were scanned and measured rotating the EUT to 360 degrees, varying
cable placement and positioning the antenna 1 to 4 meters above the ground plane, in both the
vertical and the horizontal polarization, to maximize the emission reading level. Record at
least six highest emissions. Emission frequency, amplitude, antenna position, polarization
and turntable position were recorded into a computer in which correction factors were used to
calculate the emission level and compare reading to the applicable limit and only QP reading
is presented. The test data of the worst-case condition(s) was recorded.
Below 1GHz Set the spectrum analyzer: RBW =100KHz VBW >= RBW, Span = enough to
catch the trace. Sweep = auto; Detector Function = Peak. Trace = Max,hold.
The worst case emissions were reported.
catch the trace. Sweep = auto; Detector Function = Peak. Trace = Max,hold.
The worst case emissions were reported.
4.1.3 TEST SETUP
EUT
Ground Plane
3 m
0.8 m
Cable
Test table & Turntable
1m ~ 4m
EMI
Receiver
Report No.: EM201300221-6
Application No.: ZJ00028648 Page 10 of 19
4.1.4 TEST RESULTS
Project No.:
ZJ00028648
Polarization:
Horizontal
Standard:
(RE)FCC PART 15 class B 3m
Power Source:
AC 120V/60Hz
Test item:
Radiation Test
Date:
2013-5-7
Temp./Hum.(%RH): 21/56%RH
Time:
13:48:37
EUT:
JBL Wireless Speaker
Distance:
3m
Model:
JBL SPARK
Test Result:
Pass
Note:
Test mode: Mode 1
No.
Frequency
Reading
Correct
Result
Limit
Margin
Remark
(MHz)
(dBuV/m)
Factor(dB/m)
(dBuV/m)
(dBuV/m)
(dB)
1 30.1691
1.47 19.33 20.80 40.00 -19.20
QP
2 35.1120
4.78 16.32 21.10 40.00 -18.90
QP
3 44.7092
4.84 11.66 16.50 40.00 -23.50
QP
4 106.2271
12.41 9.69
22.10 43.50 -21.40
QP
5 183.2170
8.30 11.20 19.50 43.50 -24.00
QP
6 310.7232
7.82 15.68 23.50 46.00 -22.50
QP
Report No.: EM201300221-6
Application No.: ZJ00028648 Page 11 of 19
Project No.:
ZJ00028648
Polarization:
Vertical
Standard:
(RE)FCC PART 15 class B 3m
Power Source:
AC 120V/60Hz
Test item:
Radiation Test
Date:
2013-5-7
Temp./Hum.(%RH): 21/56%RH
Time:
13:50:35
EUT:
JBL Wireless Speaker
Distance:
3m
Model:
JBL SPARK
Test Result:
Pass
Note:
Test mode: Mode 1
No.
Frequency
Reading
Correct
Result
Limit
Margin
Remark
(MHz)
(dBuV/m)
Factor(dB/m)
(dBuV/m)
(dBuV/m)
(dB)
1 35.5088
13.93 16.07 30.00 40.00 -10.00
QP
2 43.7154
12.28 12.02 24.30 40.00 -15.70
QP
3 46.2424
13.42 11.08 24.50 40.00 -15.50
QP
4 48.3686
13.97 10.33 24.30 40.00 -15.70
QP
5 57.2506
14.92 8.48
23.40 40.00 -16.60
QP
6 97.6401
13.47 9.93
23.40 43.50 -20.10
QP
Report No.: EM201300221-6
Application No.: ZJ00028648 Page 12 of 19
4.2 CONDUCTED EMISSION MEASUREMENT
4.2.1 LIMITS
Frequency range
Limits (dBµV)
Quasi-peak
Average
150kHz ~ 0.5MHz
66~56 56~46
0.5 MHz ~ 5 MHz
56 46
5 MHz ~ 30 MHz
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 150kHz to
0.5MHz.
0.5MHz.
4.2.2 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:
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:
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
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;
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;
plane;
– The EUT are placed on the floor that one side of the housings is 40 cm from the vertical
reference ground plane and other metallic parts;
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.
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.
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.
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,
highest emission level in the preliminary test. A scan was taken on both power lines,
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