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Appliances are deemed to comply in the frequency range from 300 MHz to 1 000 MHz if
( `, D* T/ p2 h( ~! O7 ]both of the following conditions ( 1) and 2)) are fulfilled:
& m* k2 }- r, E% A9 X0 ~& Q3 c1) all emission readings from the equipment under test shall be lower than the applicable
5 [% T3 C$ D( C0 O& }8 \+ A* Mlimits (Table 2a) reduced by the margin (Table 2b);
$ i; d. I( M4 C. `2) the maximum clock frequency shall be less than 30 MHz.: }4 I2 i! B+ `1 c& }& O
If either of condition 1) or 2) is not fulfilled, radiated measurements in the frequency range
6 n2 k6 x- l, D+ c: w( Nfrom 300 MHz to 1 000 MHz shall be conducted and the limits of Table 3 for that range
( m9 F3 I9 e6 aapplied. In any case the limits of Table 2a in the frequency range 30 MHz to 300 MHz
* k7 i- f7 U& E4 mshall be met./ K0 u9 Q9 Y: d
Table 2b Margin when performing disturbance power measurement in the frequency range 30 MHz to 300 MHz
' n3 Z7 j& A8 {& X( _3 tFrequency range Quasi-peak dB (pW) 2 a8 a& I$ m0 c! [, ] f0 |# `' L
200 to 300 0 to 10 dB -& n1 w& [4 }: u4 I
当功率骚扰(DP)200到300MHzQP余量小于10dB时,辐射(RE)是需要测试的。参见CISPR14-1 2009 |
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