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Appliances are deemed to comply in the frequency range from 300 MHz to 1 000 MHz if
1 M+ V# ~9 v4 m2 g1 O; _both of the following conditions ( 1) and 2)) are fulfilled:
6 u' S, E4 w0 r" b1 s2 _$ i1) all emission readings from the equipment under test shall be lower than the applicable
, B& @2 S2 k! D9 Hlimits (Table 2a) reduced by the margin (Table 2b);
5 V' e# K* }, |1 k: q7 _$ W6 ?2) the maximum clock frequency shall be less than 30 MHz.3 o, c3 Q3 }1 }8 f0 b9 R
If either of condition 1) or 2) is not fulfilled, radiated measurements in the frequency range
/ \ w4 u3 r5 B1 l; e2 xfrom 300 MHz to 1 000 MHz shall be conducted and the limits of Table 3 for that range
8 G! |2 V; x, S" O+ V/ H) {applied. In any case the limits of Table 2a in the frequency range 30 MHz to 300 MHz8 b( }$ E$ H: D2 B' [
shall be met.
6 V: v9 |! K) q$ r! ^3 E( b3 fTable 2b – Margin when performing disturbance power measurement in the frequency range 30 MHz to 300 MHz" H% Q. F8 Y: l0 ~+ o* j1 f
Frequency range Quasi-peak dB (pW)
4 O: U: b# h3 @4 r# [: [0 X200 to 300 0 to 10 dB -& q" K5 t* A$ m* B
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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