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Report No：W-N-1109009-CY-01-1                                                                                       

 

According to EN 55020:2007, item 5.4, for Measurement of immunity to RF voltage 
(common mode) at antenna terminal. 
For this EUT is without antenna terminal, there is no requirement for measuring 
immunity to RF voltage, and adverse signal do not occur.

 

 

 
The test requirement was in accordance with EN 55020: 2007, item 5.4 
 

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Report No：W-N-1109009-CY-01-1                                                                                       

 

Equipment not fitting inside the open strip line shall be measured according 

IEC61000-4-3 in the frequency range 80MHz to 150MHz 

Test Item 

Test Specification 

Radiated Signal(S3) 

80-150MHz  

(AM 80% depth, with 1kHz) 

3V/m. 

Frequency 

MHz 

Level 

dB (μV/m) 

0.15  to  150 

125 

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Report No：W-N-1109009-CY-01-1                                                                                       

 

 
The test requirement was in accordance with EN 55020: 2007, item 5.8 
 

 
No deviation 
 

 
Immunity Against Radiated RFI (S3) 
 
 

EUT

MBS

AC Power Source

50/75 Ω

Shielding Room

50/150Ω

150Ω Att

Speaker (R/L)

Headphone (R/L)

Audio Out (R/L)

AC Power Source

Test System

Interfering Signal

Audio Analyzer

AC Power

Desired Signal

AF Generator

BS 8Ω

BS 300Ω

BS 

Antenna Input

Audio In (R+L)

Ri

100Ω

1kΩ

2.2kΩ

10kΩ
22kΩ

Isolation Transformer

 

 
 
 
 
 
 
 

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Report No：W-N-1109009-CY-01-1                                                                                       

 

 

 
 
 

 

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