|
Appliances are deemed to comply in the frequency range from 300 MHz to 1 000 MHz if
, @; A3 v& g# jboth of the following conditions ( 1) and 2)) are fulfilled:
1 i1 L! Z5 p, p% |1) all emission readings from the equipment under test shall be lower than the applicable
; P' h( Z9 d) l$ ulimits (Table 2a) reduced by the margin (Table 2b);7 r0 Y/ U, d1 q+ ~4 N2 Y
2) the maximum clock frequency shall be less than 30 MHz.+ e9 b& }2 W! Q5 _
If either of condition 1) or 2) is not fulfilled, radiated measurements in the frequency range6 e6 v, ~4 S0 R9 _
from 300 MHz to 1 000 MHz shall be conducted and the limits of Table 3 for that range
7 W" E/ q# k* _) N. ^" Mapplied. In any case the limits of Table 2a in the frequency range 30 MHz to 300 MHz8 s& O( N4 i0 K8 t$ w( j9 C- a
shall be met.
+ T1 f* [; L" J. u$ m mTable 2b – Margin when performing disturbance power measurement in the frequency range 30 MHz to 300 MHz
: v% M! t6 q9 U, f+ x5 f! qFrequency range Quasi-peak dB (pW) & T4 _: R8 i$ s7 p5 }$ Z
200 to 300 0 to 10 dB -3 f: b. E `( O$ I5 H
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 |
|