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Appliances are deemed to comply in the frequency range from 300 MHz to 1 000 MHz if
4 q# l2 O/ J: q, Fboth of the following conditions ( 1) and 2)) are fulfilled:
0 b8 H/ ?+ {% x' f, u+ w1) all emission readings from the equipment under test shall be lower than the applicable
5 a5 }* B- @8 X( qlimits (Table 2a) reduced by the margin (Table 2b);# [( @( i" c3 \3 K2 f- q
2) the maximum clock frequency shall be less than 30 MHz.4 ^% M- i1 d) \/ U3 c7 h
If either of condition 1) or 2) is not fulfilled, radiated measurements in the frequency range+ w3 r/ ^% {2 k. Y" Z+ w
from 300 MHz to 1 000 MHz shall be conducted and the limits of Table 3 for that range
9 l& R' I) n0 D# n# v( Japplied. In any case the limits of Table 2a in the frequency range 30 MHz to 300 MHz
' \9 R& b- h0 F8 s9 X H% Ushall be met.
E5 p# s# x! D9 o2 C# I L2 }: O! Q3 KTable 2b Margin when performing disturbance power measurement in the frequency range 30 MHz to 300 MHz
0 `; P. h8 Q9 t" C: K5 cFrequency range Quasi-peak dB (pW) / c4 M1 ]) R2 e7 I, i
200 to 300 0 to 10 dB - O* N/ l( w6 Y, s5 X7 G
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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