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Appliances are deemed to comply in the frequency range from 300 MHz to 1 000 MHz if+ N. Q9 F/ h5 @
both of the following conditions ( 1) and 2)) are fulfilled:
9 E9 g1 a8 b2 U8 u! C1) all emission readings from the equipment under test shall be lower than the applicable$ w6 J6 v2 H8 x# A! S/ `* H% D
limits (Table 2a) reduced by the margin (Table 2b);
# p# F4 _1 j( N$ R2 J& {( e2) the maximum clock frequency shall be less than 30 MHz.- M6 Y! |$ M) { W, t- i
If either of condition 1) or 2) is not fulfilled, radiated measurements in the frequency range
$ S2 i/ f/ m& L; N+ U X- \% J0 efrom 300 MHz to 1 000 MHz shall be conducted and the limits of Table 3 for that range& ?; l! S1 B: O, C; W. G
applied. In any case the limits of Table 2a in the frequency range 30 MHz to 300 MHz. ?7 E6 y* m+ e" J7 F+ w0 C# t! a
shall be met.# a, _ V3 w, u8 R' e' Q, Y% X
Table 2b – Margin when performing disturbance power measurement in the frequency range 30 MHz to 300 MHz4 b- l. V& r! b R$ e) n. p' D, f4 u* {
Frequency range Quasi-peak dB (pW) , g; L( a! X8 R& ]' ]
200 to 300 0 to 10 dB -
L2 ^- W5 y; ?6 z1 g' \3 `2 Q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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发表于 2010-10-26 11:54
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