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Appliances are deemed to comply in the frequency range from 300 MHz to 1 000 MHz if
0 H# J5 S5 Q9 s0 Jboth of the following conditions ( 1) and 2)) are fulfilled:1 v8 k% m( i3 c! J7 c
1) all emission readings from the equipment under test shall be lower than the applicable" E2 C6 t2 Q$ W2 w! S3 E
limits (Table 2a) reduced by the margin (Table 2b);
9 S; x0 a5 f$ l" v6 \4 C: g2) the maximum clock frequency shall be less than 30 MHz.
, w/ k1 ?" X- r5 W8 A: R/ e4 y9 cIf either of condition 1) or 2) is not fulfilled, radiated measurements in the frequency range3 M+ K( h v5 d$ Z
from 300 MHz to 1 000 MHz shall be conducted and the limits of Table 3 for that range. S L0 e, \1 G( ?5 [2 a7 U
applied. In any case the limits of Table 2a in the frequency range 30 MHz to 300 MHz& p% A* S; h7 }# Q2 v
shall be met.$ g/ c/ F+ G! G# N) c
Table 2b – Margin when performing disturbance power measurement in the frequency range 30 MHz to 300 MHz3 |& ~, L6 C# b/ [, m d$ c
Frequency range Quasi-peak dB (pW) - C* ~7 z; f) W/ e
200 to 300 0 to 10 dB -
& |" x2 i0 m9 f( S1 i" p( 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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