DVD 22 (serv.man2) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 11

 

 

Test report no. JSH0311046-001 

                                          

                Page 10 of 19 

 
7.CONTINUOUS DISTURBANCE POWER 

 

       

 
7.2 Operating environment 
 
Temperature:                         22 

°C 

Relative Humidify:                41 % 
 
7.3 Test set-up and test procedure 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
The disturbance power has been measured with the EUT placed on a non-metallic table at least 0,4m 
from other metallic objects and the main lead was extended to about 6 m long. The absorbing clamp 
was placed around the lead and moved along the lead to obtain maximum disturbance. 
 
Amplitude measurements were performed with a quasi-peak detector and, if required, with an average 
detector. 
 
7.4 Measurement uncertainty 
 
Disturbance power, quasi-peak detection:          + 2,0 dB 
Disturbance power, average detection:               + 2,0 dB 
 
The measurement uncertainty described the overall uncertainty of the given measured value during 
operation of the EUT in the above mentioned way. 
Measurement uncertainty is calculated in accordance with WECC 19-1990. 
The measurement uncertainty is given with a confidence of 95% 
 
 
 

Absorbing clamp 
moved over power 
cord to obtain max. 
reading o receiver 

Absorbing 
clamp 

Radio-noise meter

Mains 

Absorber 
(ferrite rings)

 

Current 
transformer

Absorber 
(ferrite rings)

 

Additional absorber used to avoid 
interference from mains (a second 
absorbing clamp may be used here)

              
 
 

EUT