AVR 151 (serv.man4) — Harman Kardon Audio EMC - CB Certificate (repair manual). Page 6

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Reference No.: 54121302D
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6. Immunity to RF voltages(S2a)
6.1 Test criteria and test procedure
Operating environment;
: 17 ℃
Relative Humidity  
: 42 %
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 
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 
The measurement are performed with TS9980 
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.
 Anam EMC Test Laboratory ▶
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