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Report No. JSH006110476-001 

Page 20 of 69 

 

 
 

 
 

Frequency (MHz) 

 

Quasi-peak 

dB(pW) 

Average 

 dB (pW) 

30 to 300 

 

45 to 55* 

35 to 45* 

 
Note: 1. * means the limit increasing linearly with the frequency. 
          2. If the limit for the measurement with the average detector is met when using a receiver  
             with a quasi-peak detector, the equipment under test shall be deemed to meet both limits  
             and the measurement with the receiver with average detector need not be carried out. 
 

 

Report No. JSH006110476-001 

Page 21 of 69 

 
 
5.2 Block Diagram of Test Setup 
 
 

 

Note: 

 

: power line 

 

  : 

signal 

lime 

 
 
5.3 Test Setup and Test Procedure 
 

The disturbance power was measured with the EUT in a shielded room. 

The EUT was placed on a non-metallic table at least 0.4m from other metallic surface and the 

mains  

lead of EUT was extended to about 6m long. The absorbing clamp was moved along the lead to 

obtain  

maximum disturbance.  

The EUT was set to achieve the maximum emission level, and for each point which appears a 

relevant  

high emission level, the absorbing clamp was moved around the lead to get the maximum 

disturbance  

value. 

 

The bandwidth of test receiver was set at 120kHz. 

  The frequency range from 30MHz to 300MHz was checked. 

Amplitude measurements were performed with a quasi-peak detector and, if necessary, with an  

average detector. 

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

Absorbing 
clamp 

Mains 

Absorber 
(ferrite rings)

 

Current 
transformer 

Absorber 
(ferrite rings)

 

            
 
 

E U T  

Transform

The transformer to provide 
a stable voltage to the EUT
during the test.

 

Radio 
noise meter

 

Report No. JSH006110476-001 

Page 22 of 69 

 
5.4 Test Protocol 
 

Temperature  

: 

22   

°C 

   

Relative Humidity 

: 

43   % 

At mains terminal 

 

 

At other leads  

AV Line 

 

 

Report No. JSH006110476-001 

Page 23 of 69 

 
 
 
 
5.5 Measurement Uncertainty 
 

The measurement uncertainty describes the overall uncertainty of the given measured value   
during  the operation of the EUT. 
Measurement uncertainty is calculated in accordance with CISPR 16-4-2:2003 
 Measurement uncertainty of mains terminal disturbance power : 

±4.5dB 

The measurement uncertainty is given with a confidence of 95%, k=2 

 

 None