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发表于 2008-10-31 12:13:59
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採用鉗注入法为什么对AE共模阻抗有要求?
你应该指的是这条,至于为什么,其实在标准的7.4中可以看出来,
Check the following requirements
I. 150 Ω AE impedance
II. Cable 30 mm to 50 mm
above GRP
III. AE sufficiently immune
7.4
When using clamp injection and the common-mode impedance requirements cannot be met at
the AE side, it is necessary that the common-mode impedance of the AE be less than or equal
to the common-mode impedance of the EUT port being tested. If not, measures shall be taken
(e.g. by using a CDN-M1 or 150 Ω resistor from the AE to ground) at the AE port to satisfy this
condition and to prevent resonances. In this procedure, only the relevant differences with those
measures mentioned in 7.3 are given.
注意里面提到to prevent resonances. 就是为了避免谐振咯。 |
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