CHARGE (serv.man5) - JBL Audio EMC - CB Certificate (repair manual). Page 7

Report No.: 

EM201200703-5

                      Application No.:

 ZJ000226535   

                  Page 7 of 14 

 

 

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

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