关于美国 FCC Part 15B & FCC Part 18辐射限值是否有差异,答案是肯定是有差异的,下面先分别列一下FCC Part 15B、 FCC Part 18的辐射限值。 FCC Part 15 标准原文辐射限值 FCC Class B Part 15.109 Radiated emission limits - 3m实验室
FCC Class B上面美国FCC的微伏/米限值,转换为dBuV/m的FCC Class B限值转换过来成dBuV/m,如下所示 - 3m实验室
FCC Class A上面美国FCC的微伏/米限值,转换为dBuV/m的FCC Class A限值转换过来成dBuV/m,如下所示- 10m实验室
注: 也就是说上面10m实验室测试限值,如果在3m实验室测试的话,那么是还要加10dB的。也就是说上面的CLASS A级限值在3米实验室测试,4段的限值分别应为,49.084850188786504dBuV/m、53.52182518111364dBuV/m、56.44438589467839dBuV/m、59.542425094393266dBuV/m FCC Part 18 标准原文辐射限值 FCC Part 18.305 Field strength limits
1, Field strength may not exceed 10 μV/m at 1600 meters. Consumer equipment operating below 1000 MHz is not permitted the increase in field strength otherwise permitted here for power over 500 watts. 2, Reduced to the greatest extent possible. 3, Field strength may not exceed 10 μV/m at 1600 meters. Consumer equipment is not permitted the increase in field strength otherwise permitted here for over 500 watts. 4, Induction cooking ranges manufactured prior to February 1, 1980, shall be subject to the field strength limits for miscellaneous ISM equipment. 我们以超声波产品,超声波主频为1.6MHz以上,辐射限值为例,对比FCC PART 15B CLASS B级民用辐射限值,进行对比: FCC Part 18给出超声波产品,超声波主频为1.6MHz以上辐射限值,FCC给出的是30m处的辐射限值为15uV/m,然后转换为对数为 23.521825181113627dBuV/m,然后将30m限值转为10m限值为 23.521825181113627+20log(30/10)=33.06dBuV/m,如果是转换为3m限值,则为,43.52dBuV/m FCC Part 15辐射限值如下: 所以,综上所述,以家用雾化器为例子,如果用FCC Part 18工科医辐射限值与FCC Part 15B CLASS B辐射限值对比,可以得知如下表格数据,所以说,如果超声波是大于1.6MHz的主频对比15B与18的限值,低频30MHz~88MHz的限值FCC Part 15B严3.52dB,216MHz~960MHz频率FCC Part 15B又松2.5dB、960MHz以上的话FCC Part 15B又松10.4594dB,详细如下:
注:不同测试距离的限值转换 Limit 2 = Limit 1 + 20log(d1/d2) |
FCC Part 15B CLASS B辐射限值
FCC Class B 辐射限值 - above 1G
FCC part18 辐射限值
FCC Part 15A & FCC Part 15B & FCC Part 18 辐射限值
FCC Part 15A & FCC Part 15B & FCC Part 18 辐射限值
FCC有FCC part15、part15A、part15B、part15C、part15D、part15E、part15F、part15G
FCC part15A是总则;
FCC part15B是无意辐射电子产品,通常是指有线类的;
FCC part15C是指有意辐射电子产品,通常是指无线类的;
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FCC part15B是无意辐射电子产品,通常是指有线类的;
FCC是美国联邦通信委员会的简写,也是美国对电子产品强制认制认证的简称,现在doc和voc统一改成了SDoc的叫法其它没有变。