AVR 445 (serv.man3) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 9

 

6. Immunity to RF voltages (S2a) 
 

 
      Operating environment; 
 Temperature 

20  ℃ 

 

Relative Humidity 

40 % 

 
      The EUT was placed 0.1m above a metallic ground plane of dimensions 2 x 1m. 
      The wanted signal was fed to all input terminals respectively and the unwanted   
        signal was fed to mains input, audio output and input terminals respectively. 
 
      The criterion concerning acceptable sound interference is a wanted to unwanted   
    audio signal ratio of ≥40 dB at a wanted signal level of 50 mW. 
 
      The audio output power was measured with a 0.5 - 3 kHz band-pass filter. 
      The audio analyzer was applied without a weighting filter. 
      The ground connection of the input matching network (Rci), output matching network (Rco), 
    and mains filter (MSF) were directly connected to the metal table. 
   The mains filter (MSF) was connected to ground while the other matching networks 
    are only connected to ground when they are being used as injection ports. 

 

   The measurements were performed with test software TS9980 Ver.2.1 
 

 
        Immunity to conducted currents : +/- 3dB 
 

 
        The equipment does comply with the requirements. 
 
    For the measurement data, see Annex B