CHARGE (serv.man5) - JBL Audio EMC - CB Certificate (repair manual). Page 8

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  

R1= 

S

4π

=  

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.