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| | Emission tests |
| In accordance with EN, FCC, VCCI, BSMI, C-Tick, etc. |
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Conducted emission |  |
Why: Limit high frequency disturbances emitted from power cords and telecommunication cables.
Testing method: Assessment of these cords and cables (e.g. ISDN).
Frequency range: 150 kHz to 30 MHz.
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Electrical field, radiated emission |
| Why: Limit radiated emission from products to avoid disturbing other transmissions (e.g. radio & TV, mobile, radio transmission from aircraft). |
Testing method: Radiated emission is measured at a distance of 10m between antenna and equipment. In doing so, the turntable, antenna and antenna polarization are varied to locate every frequency emitted at its highest level.
Frequency range: 30 MHz to 1 GHz and 1 GHz to 40 GHz. |
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Harmonics | |
Why: Products with switching power supplies generate harmonic currents because of their non-sinusoidal current. These harmonic currents need to be limited (required by electricity suppliers).
Testing method: Input current measured with specific coupling device networks. |
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Flicker |
Why: Equipment can cause large voltage variations when switched on or off and thereby affect the public power supply.
Testing method: Measuring the voltage fluctuations and flicker in low voltage supply systems. |
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