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Table 7 Frequencies of various interference sources (examples)
Frequency range
16,67Hz
50Hz
60Hz
50Hz-200Hz
200Hz-1kHz
31kHz
40kHz
42kHz
45kHz
49kHz
52kHz
56kHz
60kHz
77,5kHz
125-135kHz
13,56MHz
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Table 8 Field strengths of magnetic fields and distance
Single conductor
Two conductors, opposite polarities
Electric coils, transformers, motors
56
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Description
Traction power (Germany)
Mains power (Europe)
Mains power (US and others)
Welding and high voltage utility network
Power converters and high voltage utility network
CRT TV
Energy-saving lamp (21W, Osram)
30" TFT monitor (Dell)
Energy-saving lamp (8W, Osram)
17" TFT monitor (Dell)
24" TFT monitor (Dell)
20" TFT monitor (Dell)
Battery charger (noname)
DCF77 (German reference time broadcast)
RFID
RFID
18.0 Tables
1/r
1/r²
1/r³
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