AUTHENTICS L8 (serv.man2) - JBL Audio EMC - CB Certificate (repair manual). Page 11

Report No.: EM201300650-1                         Application No.: ZJ00032008                       Page 11 of 42 
 

 

For wide band modulations other then FHSS (e.g. DSSS, OFDM, etc.), the maximum e.i.r.p. 

spectral density is limited to 10 mW per MHz. 

EUT operation status: 

Keep EUT on transmitting mode by the software provided by 
manufacturer. 
Pretest the EUT at different transmission rate and report show 
the worst case data. 

     

Test channel: 

802.11b/g 
Lowest channel: (2412MHz),Middle channel: (2442MHz), 
Highest channel: (2472MHz) 

Test condition: 

Normal test conditions. 

Test equipment used: 

Refer to section 3.4 

Test procedure: 

1.  Connect a low attenuation cable from the antenna port to the 

spectrum. 

1.  Set spectrum analyzer center frequency is centered of test 

channel; Set RBW and VBW = 1MHz. Sweep = auto. Span 
is wide enough to cover the complete power envelope of the 
signal of the EUT. Detector function = Peak. Trace = Max 
hold; find the peak value of the power envelope. Save the 
trace. 

2.  Set the Centre Frequency is equal to the frequency find in 

step 2; RBW and VBW=1MHz, Span=3M, Sweep time=1 
min, Detector function= Average, Trace= Max hold. 

3.  Find the peak value of the power envelope and record the 

frequency. Save the trace. 

Remark:    

Pre-scan all the rate, found that:  
11Mbps of rate is the worst case of 802.11b;  
54Mbps of rate is the worst case of 802.11g ;