Outlines of Major Noise Regulation Standards

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83

C50E.pdf

Aug.28,2008

Regulation

CISPR 22/

EN55022

Radiated Interference

Horizontal Pol. Vertical Pol.

30M to 1GHz

Quasi-Peak Detection

Antenna

Artificial Main Network

Antenna

Artificial Main Network

Dipole Antenna

Artificial Main Network

Quasi-Peak Detection

Quasi-Peak Detection Mean Detection

Quasi-Peak Detection Mean Detection

Quasi-Peak Detection

Quasi-Peak Detection Mean Detection

150k to 30MHz

Peak

UQuasi-PeakUAverage

(Qp)

30M to 40GHz

150k to 30MHz

30M to 1GHz

150k to 30MHz

AC Main Ports

Horizontal Pol. Vertical Pol.

AC Main Ports

Horizontal Pol. Vertical Pol.

AC Main Ports

Main Interference Voltage

Radiated Interference

Main Interference Voltage

Radiated Interference

Main Interference Voltage

VCCI

FCC Part 15

Measuring Item

Polarization and Measuring Point

Frequency (Hz)

Detection

Measuring Devices

2. Measurement Point and Noise Detection

3. Limits of CISPR 22/EN55022

(1) CISPR 22 recommends measurement at 10m distance.

However, other distance is acceptable if the limitation is

converted according to the following calculation.

Limitation shown left is converted to limitation for 3m

distance.

Conversion

Main Terminal Interference Voltage (Power Supply)

Radiated Interference

Short Repetition Period

Long Repetition Period

V

t

Peak Detection

Quasi-Peak Detection

Average Detection

Limitation for

3m Distance

µ V/m)

µ V/m)

3

Limitation for

10m Distance

µ V/m)

µ V/m)

79

30

10k

100k 150k 500k 1M

5M 10M

30M 100M

50

70

90

66

56

56

46

73

60

50

Frequency (Hz)

Class A Quasi-peak value

Class A Mean value

Class B Quasi-peak value

Class B Mean value

30

10M

30M

100M

230M

1G

57

47

50

40

50

90

Class A

Class B

Frequency (Hz)

On the border frequency, lower limit should be applied.

Class A Equipment: The equipment which is used in light

industrial commercial areas.

Class B Equipment: The equipment which is used in

residential areas.

Continued from the preceding page.

V

t

Peak Detection

Quasi-Peak Detection

Average Detection

←

70

Continued on the following page.