JBL CHARGE (serv.man5) EMC - CB Certificate ▷ View online
Report No.:
EM201200703-5
Application No.:
ZJ000226535
Page 5 of 14
2. LABORATORY AND ACCREDITATIONS
2.1 LABORATORY
The tests and measurements refer to this report were performed by Guangzhou GRG Metrology and
Test CO., LTD.
Add.
: 163 Pingyun Rd, West of Huangpu Ave, Guangzhou, 510656, P. R. China
Telephone: +86-20-38699959, 38699960, 38699961
Fax
: +86-20-38695185
2.2 ACCREDITATIONS
Our laboratories are accredited and approved by the following approval agencies according to
ISO/IEC 17025.
ISO/IEC 17025.
USA
FCC Listed Lab (No. 688188)
China
CNAS (No.L0446)
China
DILAC (No.DL175)
Canada
Registration No.:8355A-1
2.3 MEASUREMENT UNCERTAINTY
Where relevant, the following measurement uncertainty levels have been estimated for tests
performed on the EUT as specified in CISPR 16-4-2:
Measurement
Frequency
Uncertainty
Radiated
Emission
Horizontal
30MHz~1000MHz 4.2dB
1GHz~12.75GHz 4.2dB
Vertical
30MHz~1000MHz 4.4dB
1GHz~12.75GHz 4.4dB
This uncertainty represents an expanded uncertainty factor of
k=2.
Report No.:
EM201200703-5
Application No.:
ZJ000226535
Page 6 of 14
2.4
LIST OF TEST EQUIPMENT USED AT GRGT
equivalent isotropic radiated power
Name of Equipment
Manufacturer
Model
Serial Number Calibration Due
Biconical Log-periodic
Antenna
Antenna
ETS.LINDGREN 3142C 00075971
2014-05-26
Signal Generator
R&S
SML03
103002
2013-11-13
Receiver R&S
ESU40
100106
2013-02-04
Biconical antenna
ELECTRO-METRICS
BIA-30S
166
2014-05-26
log-periodical antenna ELECTRO-METRICS LPA-30
383
2014-05-26
Horn antenna
ETS.LINDGREN
3117
00075824
2013-08-19
Horn antenna
SCHWARZBECK
BBHA9120D D752
2013-10-14
Constant
temperature&mimidity
chamber
temperature&mimidity
chamber
CEPREI
CEEC-MSJ-
60BE
60BE
11015 2013-05-21
AC power supply
WEST
WE-1120
681598
2013-05-31
Report No.:
EM201200703-5
Application No.:
ZJ000226535
Page 7 of 14
3
. TECHNICAL REQUIREMENTS SPECIFICATION IN EN 62311
3.1 GENERAL DESCRIPTION OF APPLIED STANDARDS
EN 62311 Generic standard to demonstrate the compliance of electronic and electrical apparatus
with the basic restrictions related to human exposure to electromagnetic fields (0 Hz–300 GHz) is
to demonstrate the compliance of apparatus with the basic restrictions or reference levels on
exposure of the general public related to electric, magnetic, electromagnetic fields as well as
induced and contact current.
with the basic restrictions related to human exposure to electromagnetic fields (0 Hz–300 GHz) is
to demonstrate the compliance of apparatus with the basic restrictions or reference levels on
exposure of the general public related to electric, magnetic, electromagnetic fields as well as
induced and contact current.
3.2 RF EXPOSURE EVALUATION
3.2.1 LIMIT
According to EN 62311, If the average power emitted by the base station is less than or equal to
20 mW then the base station is deemed to comply without testing.
20 mW then the base station is deemed to comply without testing.
If the average power emitted by the base station is more than 20 mW, then E, H or SAR
calculations and/or measurements shall be performed according to Clause 4. The results of
calculations and/or measurements shall be compared directly to the limits.
The product is deemed to fulfil the requirements of this standard if the calculated and/or
measured
measured
values are less than or equal to the limits.
NOTE In the setting of basic restrictions and the derived reference levels, safety factors have
been taken into account. In the specification of the assessment method, uncertainty has been
constrained. This is the reason for not requiring that the measured values shall be compared to
the limit reduced by the measurement uncertainty.
Test conclusion:
MPE calculate procedure:
been taken into account. In the specification of the assessment method, uncertainty has been
constrained. This is the reason for not requiring that the measured values shall be compared to
the limit reduced by the measurement uncertainty.
Test conclusion:
MPE calculate procedure:
According to the formula S =
2
4 R
PG
π
Where: S = power density (in appropriate units, e.g. mW/cm
2
)
P = power input to the antenna (in appropriate units, e.g., mW)
G = power gain of the antenna in the direction of interest relative to an isotropic radiator.
R = distance to the center of radiation of the antenna (appropriate units, e.g., cm)
And the limit of table 2 of Council Recommendation 1999/519/EC
Report No.:
EM201200703-5
Application No.:
ZJ000226535
Page 8 of 14
Now the EUT frequency rang in 2402-2480MHz, so the limit S for it are 10W/m
2
.
The antenna port of EUT Max output power is 8.83 dBm (7.64mW). The gain of the integral
antenna is 1.48dBi in the actual use. 1.48dB logarithmic terms convert to numeric result is
nearly 1.41.
So the
antenna is 1.48dBi in the actual use. 1.48dB logarithmic terms convert to numeric result is
nearly 1.41.
So the
R1=
S
4π
PG
=
10000
14
.
3
4
1.41
7.64
×
×
×
= 0.93cm,
So the recommend use distance for EUT external antenna is larger than 0.93 centimeter.
Because the external dimension of the EUT is 17.5cm×7.4cm×7.4cm. The Bluetooth
module inside of the EUT and the nearest distance of BT module and outside of the speaker
is more than 0.93cm. So the EUT is safe for human.
module inside of the EUT and the nearest distance of BT module and outside of the speaker
is more than 0.93cm. So the EUT is safe for human.
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