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Report No.: 

EM201300221-4

                      Application No.:

 ZJ00028648   

                  Page 5 of 11 

 

 

 

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 

Our laboratories are accredited and approved by the following approval agencies according to 
ISO/IEC 17025. 

FCC Listed Lab (No. 688188) 

CNAS （No.L0446） 

DILAC (No.DL175) 

Canada 

Registration No.:8355A-1 

 

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.: 

EM201300221-4

                      Application No.:

 ZJ00028648   

                  Page 6 of 11 

 

 

 

 

Receiver R&S 

ESU40 

100106 

2014-01-24 

Loop antenna 

R&S 

HFH2-Z2 

881058/58 

2013-05-26 

Biconical Log-periodic 
Antenna 

ETS.LINDGREN 3142C  00075971 

2013-05-26 

Signal Generator 

R&S 

SML03 

103002 

2013-11-13 

Biconical antenna 

ELECTRO-METRICS 

BIA-30S 

166 

2013-05-26 

log-periodical antenna  ELECTRO-METRICS LPA-30 

383 

2013-05-26 

Horn antenna 

ETS.LINDGREN 

3117 

00075824 

2013-08-19 

Horn antenna 

SCHWARZBECK 

BBHA9120D D752 

2013-10-14 

Per-Amplifier 
(0.1-26.5GHz) 

Compliance Directions 
systems Inc. 

PAP-0126 25002 

2014-01-05 

Semi-anechoic 
chamber 

ETS 

966(RFD-F/
A-100) 

3730 2014-03-25 

 

Report No.: 

EM201300221-4

                      Application No.:

 ZJ00028648   

                  Page 7 of 11 

 

 

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. 

 

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. 

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 

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: 

According to the formula S = 

2

4 R



  

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.: 

EM201300221-4

                      Application No.:

 ZJ00028648   

                  Page 8 of 11 

 

 

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 5.66 dBm (3.68mW).  The gain of the integral 
antenna is -2dBi in the actual use. -2dB logarithmic terms convert to numeric result is nearly 
0.63. 
So the  

R1= 

S

4π

=  

10000

14

.

3

4

0.63

5.66







= 0.53cm, 

 

So the recommend use distance for EUT external antenna is larger than 0.53 centimeter. 
Because the max diameter of the EUT is 18cm, the height is 18cm. The Bluetooth module 
inside of the EUT and the nearest distance of BT module and outside of the speaker is more 
than 0.53cm. So the EUT is safe for human.