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Reference No. : 54120707D                                                                                                                        Page 6

 

◀  Anam EMC Test Laboratory  ▶

 

 
 

5. Input immunity to RF voltages (in differential mode)(S1) 

 

 
    5.1 Test criteria and test procedure 
 
    Operating environment; 
        Temperature                  : 15  ℃   
        Relative Humidity        : 50 % 
 
        The criterion concerning acceptable    sound interference is a wanted to   
    unwanted audio signal ratio of ≥ 40dB at a wanted signal level of 50mW. 
 
        The EUT was placed by 0.1m above a metallic ground plane of dimensions   
        2 x 1 m. The measuring set-up was shown in figure 3 EN55020(2002). 
        The principle of operation was similar to the measuring set-up of figure 3 in 
    EN55020(2002). 
        The low pass filter was added to prevent the influence of the measuring results 
        by harmonics of the unwanted signal generators. 
         
        The speaker outputs of the EUT were applied to an 8Ω   purely resistive load 
    (Ro) and then to the AF inputs of the test system. 
        The power supply of the EUT was connected to a standard voltage source 
    (without special filters). 
        The measurements were performed with test software TS9980 Ver.2.9. 
 
         
  5.2 Measurement uncertainty 
 
    Antenna input immunity ± 2.0dB 
 
    5.3 Test result of input immunity to RF voltages. 
 
        The equipment does comply with the requirements. 
 
        For the measurement data, see annex A 
 
 
 

Reference No. : 54120707D                                                                                                                        Page 7

 

◀  Anam EMC Test Laboratory  ▶

 

 
 

6. Immunity to RF voltages(S2a) 

 
    6.1 Test criteria and test procedure 
 

Operating environment; 

          Temperature                  : 15  ℃   
          Relative Humidity        : 50 % 
 

The EUT was placed 0.1m above a metallic ground plane of dimensions 2 x1m. 
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  ≥ 40dB at a wanted signal level of 50mW. 

 

The audio output power was measured with a 0.5 - 3kHz 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 measurement are performed with TS9980 Ver.2.9. 

 
 

6.2 Measurement uncertainty 

 

Immunity to conducted voltage : ± 2dB. 

 

6.3 Test result immunity to conducted voltage. 

 

The equipment does comply with the requirements. 

 

For the measurement data, see annex B. 

 

Reference No. : 54120707D                                                                                                                        Page 8

 

◀  Anam EMC Test Laboratory  ▶

 

 
 

7. Immunity to RF voltages (in common mode)(S2b)

 

 
  7.1 Test criteria  and test procedure 
 

Operating environment; 

          Temperature                  : 15  ℃   
          Relative Humidity        : 50 % 
 

During the test of immunity to RF voltages(in common mode), the EUT was   
placed 0.1m above a metallic ground plane of dimensions 2 x 1m. 

 

The criterion concerning acceptable sound interference is a wanted to   
unwanted audio signal ratio of  ≥ 40dB at a wanted signal level of 50mW 

 

The requirements for receivers,multifuction equipment and video tape   
equipment concerning the immunity to RF voltages in common mode are   
restricted to the antenna terminals and to the frequency range from 26 ㎒ to  
30 ㎒. The cables linking the coupling units to the EUT was short . 
A bandpass filter was connected to the test system and was used for the EUT   
AF outputs. 
All unused inputs/outputs of the coupling units was terminated with the   
proper resistance. 
The power cable of the EUT was uniformly bundled together and as short 
as possible. 

 

The measurement are performed with TS9980 Ver.2.9. 

 

7.2 Measurement uncertainty 

 

Immunity to conducted currents : ± 2dB 

 

7.3 Test result immunity to conducted currents. 

 

The equipment does comply with the requirements. 

 

The equipment does comply with the requirements. 

 

Reference No. : 54120707D                                                                                                                        Page 9

 

◀  Anam EMC Test Laboratory  ▶

 

 
 

8. Immunity to ambient electromagnetic fields (S3) 

 

8.1 Test criteria    and test procedure 

   

Operating environment; 

          Temperature                  : 15  ℃   
          Relative Humidity        : 50 % 
 

The EUT was placed on a non-metallic support by 0.1m above the lower   
conductor in the center of the stripline. 
The wanted signal was fed to all input terminals respectively .The unwanted   
signal is fed to a matching network of the stripline. 
The ground connection of the mains filter(M) was directly connected to the 
jacky. 
All unused input/output connections on the EUT were terminated and   
shielded with the proper resistance. 
The power supply to the mains of the EUT was attached to the mains filter(M). 
Ferrite rings for this test was required on all test cables inside the shielded   
room. 

 

The measurement are performed with TS9980 Version 2.9. 

 
 

8.2 Measurement uncertainty 

 

Radiated fields    : ± 2dB 

 

8.3 Test result immunity from radiated fields. 

 

The equipment does comply with the requirements. 

 

For the measurement data, see annex D.