ON BEAT RUMBLE (serv.man5) - JBL Audio EMC - CB Certificate (repair manual). Page 8

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.