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Appliances are deemed to comply in the frequency range from 300 MHz to 1 000 MHz if u/ }' V) y- c9 z0 x' F2 L# A8 {
both of the following conditions ( 1) and 2)) are fulfilled:' y! K9 A r+ C0 A2 v4 B ~2 Z8 r
1) all emission readings from the equipment under test shall be lower than the applicable
. G: _3 N, p) I3 I1 V& Nlimits (Table 2a) reduced by the margin (Table 2b);! n+ D2 E* }! W+ F7 n4 K
2) the maximum clock frequency shall be less than 30 MHz.- Z7 B) j" q6 \' s; u2 \
If either of condition 1) or 2) is not fulfilled, radiated measurements in the frequency range! i. i, q/ g, m( P# j7 [) r8 m% k/ g
from 300 MHz to 1 000 MHz shall be conducted and the limits of Table 3 for that range
" D6 t+ y2 z5 R1 h, s, ?6 C( oapplied. In any case the limits of Table 2a in the frequency range 30 MHz to 300 MHz4 G/ r. z1 l9 x# d9 B
shall be met., n+ P9 R" \$ J2 Q4 p0 C
Table 2b Margin when performing disturbance power measurement in the frequency range 30 MHz to 300 MHz
+ m: j7 b3 X+ a- lFrequency range Quasi-peak dB (pW)
: n0 F& H+ V" G6 f200 to 300 0 to 10 dB -
8 P, }2 A) z; |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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