关于FCC 和 CE Class A 与 Class B 官方说明：

emperor

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关于FCC 和 CE Class A 与 Class B 官方说明：

不知哪位弟兄有曾注意过！可否方便提供！

ds1983

这个都写在标准中，你去看EMC标准的definition都会有，每个标准还不一样，有些定义为Class A,B,C,D 比如谐波。一般你说的就是像EN55022定义的Class A工业级和Class B民用级。这些在EN55022的definition里面都有。标准永远是针对测试的，指令是针对法规的。

0 ?0 f/ \' Z# ~2 X0 cFCC的我去找找。。。

ds1983

FCC的定义在Part15.3，如下。当然这也是只是针对Part15覆盖的产品的。其他部分的看相应部分的definition。
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& x. R6 N% _, G' r, ~http://a257.g.akamaitech.net/7/2 ... ctqtr/47cfr15.3.htm

0 G% Y0 |' b; e* v9 E# W5 @    (h) Class A digital device. A digital device that is marketed for
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; g, K; g3 Q' fuse in a commercial, industrial or business environment, exclusive of a

* ]& ^& C/ E; R. Rdevice which is marketed for use by the general public or is intended to

3 c5 P+ }: P: h& k5 W$ abe used in the home.
# }2 J  o6 o+ u& M
1 K3 i1 B8 d9 C' x    (i) Class B digital device. A digital device that is marketed for
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use in a residential environment notwithstanding use in commercial,

' H8 }6 {; P, Q' p" ?business and industrial environments. Examples of such devices include,

but are not limited to, personal computers, calculators, and similar
; D" B; m+ k: r* E. {$ s  _
% H: H8 v3 C, r! ?& E+ _" @3 melectronic devices that are marketed for use by the general public.



+ e0 K6 [6 c  r( v4 X    Note: The responsible party may also qualify a device intended to be

1 p6 t: s! C! G. G, Y! }marketed in a commercial, business or industrial environment as a Class B device, and

9 r7 j# ^- H& l3 L) f5 n  Xin fact is encouraged to do so, provided the device complies with the
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technical specifications for a Class B digital device. In the event that

  `: i% W5 o1 V3 u+ Ya particular type of device has been found to repeatedly cause harmful

interference to radio communications, the Commission may classify such a
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digital device as a Class B digital device, regardless of its intended

6 t# P% u4 V' D+ _0 @! b+ Juse.

emperor

引用第2楼ds1983于2007-08-22 10:27发表的  :
FCC的定义在Part15.3，如下。当然这也是只是针对Part15覆盖的产品的。其他部分的看相应部分的definition。

http://a257.g.akamaitech.net/7/2 ... ctqtr/47cfr15.3.htm

    (h) Class A digital device. A digital device that is marketed for
3 @8 ]  h1 p1 g.......

不知是否有FCC完整的官方说明，针对Class A 与 Class B及ID申办差异！

感谢ds1983热心襄助！

ds1983

FCC Part15.101 列出了产品与认证方式的对应关系。
http://a257.g.akamaitech.net/7/2 ... qtr/47cfr15.101.htm

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             Type of device                                  Equipment authorization required
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TV broadcast receiver...................  Verification.
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2 g( N3 o) D% P& G$ GFM broadcast receiver...................  Verification.

( V" V# _* M2 H$ uCB receiver.............................  Declaration of Conformity or Certification.
) ^# X3 p+ F. m4 y7 _+ |; D; K# p
! p! h2 i1 r6 ^* R2 [Superregenerative receiver..............  Declaration of Conformity or Certification.
# J! ~5 w4 i& c4 {
4 W* p/ y1 B6 u0 T" YScanning receiver.......................  Certification.
1 j9 c: t; t4 l8 n% J% L2 _3 q
Radar detector..........................  Certification.
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All other receivers subject to part 15..  Declaration of Conformity or Certification.
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* b, Z3 u# e8 k: h( w3 a$ A" {TV interface device.....................  Declaration of Conformity or Certification.

+ h. y% X5 ^! ?3 F, Z( I  b8 ACable system terminal device............  Declaration of Conformity.
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; V  S" q! p" l; v% `4 @Stand-alone cable input selector switch.  Verification.
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Class B personal computers and            Declaration of Conformity or Certification.\\1\\

peripherals.
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CPU boards and internal power supplies    Declaration of Conformity or Certification.\\1\\

used with Class B personal computers.

0 ^' }  W! v# g# |* \Class B personal computers assembled      Declaration of Conformity.
+ }* E$ m7 i! q& }; u- P9 j: ^
5 y, r  {+ X- ?0 \% |* D9 o$ m using authorized CPU boards or power
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  e/ ~( ^! X" q" N! T" c0 K supplies.

Class B external switching power          Verification.
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2 Z% {5 S$ u' m# s supplies.

Other Class B digital devices &           Verification.
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peripherals.

Class A digital devices, peripherals &    Verification.
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) t" Y, Q* X2 \7 g external switching power supplies.

6 c* z/ z2 |) d( N! S8 f7 n4 TAccess Broadband over Power Line (Access  Certification.

BPL).
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$ T. f! r: `3 @4 I! R: S3 yAll other devices.......................  Verification.
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6 d- @8 N, {1 F7 I----------------------------------------------------------------------------------------------------------------

emperor

引用第4楼ds1983于2007-08-22 14:29发表的  :
FCC Part15.101 列出了产品与认证方式的对应关系。
$ Y, v* w4 x  v- _7 chttp://a257.g.akamaitech.net/7/2 ... qtr/47cfr15.101.htm

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0 C9 F  t5 X8 R7 o: T.......

6 d7 U/ c. u4 m8 o' Y; {) g哇~感謝ds1983

Naomi

CE EN 55022 的 Class A  與 Class B 在法規中有定義
1 P" k* j8 k5 ?: q! D; G7 p5 @如ds1983 大大所說的 FCC 的 Class A  與 Class B 在  FCC 15.3(h) & (i)中有定義.

在此想跟大大分享的是 FCC 的 Class A 與 Class B 僅適用於 Digital Device.

何謂 Digital Device?
/ `+ E" e2 M5 o$ TFCC 15.3(k)  Digital device.   (Previously defined as a computing device).  An unintentional radiator (device or system) that generates and uses timing signals or pulses at a rate in excess of 9,000 pulses (cycles) per second and uses digital techniques;  inclusive of telephone equipment that uses digital techniques or any device or system that generates and uses radio frequency energy for the purpose of performing data processing functions, such as electronic computations, operations, transformations, recording, filing, sorting, storage, retrieval, or transfer.  A radio frequency device that is specifically subject to an emanation requirement in any other FCC Rule Part or an intentional radiator subject to Subpart C of this Part that contains a digital device is not subject to the standards for digital devices, provided the digital device is used only to enable operation of the radio frequency device and the digital device does not control additional functions or capabilities.  Note:  Computer terminals and peripherals that are intended to be connected to a computer are digital devices.
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各位再看看 FCC 15.107 & FCC 15.109 的 limit 是寫
$ k# ]; v# d; I" r0 o(a)  Except for Class A digital devices, .......
- j) ^8 k. C0 F(b)  For a Class A digital device......

( S! H& t$ B1 v+ }. X5 p/ k因此 除了 ITE 類有分 Class A 與 Class B 外, 其他均應使用 Class B limit.

ds1983

引用第7楼Naomi于2007-09-05 12:22发表的  :
CE EN 55022 的 Class A  與 Class B 在法規中有定義
如ds1983 大大所說的 FCC 的 Class A  與 Class B 在  FCC 15.3(h) & (i)中有定義.
+ B% c1 h3 P* B7 A
在此想跟大大分享的是 FCC 的 Class A 與 Class B 僅適用於 Digital Device.
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.......

) k4 A, x/ g4 _/ ~7 M) l大大。。。这是什么新称呼。。。叫我小鸟好了。。。
看来Naomi兄也是专家，以后要多来EMC区捧场！

Naomi

引用第8楼ds1983于2007-09-06 21:01发表的  :


4 y% p* y' m& q3 D1 P) ]9 h' \, ?大大。。。这是什么新称呼。。。叫我小鸟好了。。。
" r% ^4 Q9 G$ H# O( \看来Naomi兄也是专家，以后要多来EMC区捧场！

$ Y0 A- l; J' q2 ?4 e7 B专家不敢当, 刚好知道一點..
6 y) m4 L6 y  e) \: m: d) Y以后一定常来EMC区

' ~5 L$ Q# v$ f2 M, R7 V8 p希望大家多指教指教.

ds1983

引用第9楼Naomi于2007-09-07 15:32发表的  :

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专家不敢当, 刚好知道一點..
以后一定常来EMC区

) Y1 u# w* J! i' g* o! n.......

9 {6 ?* W( d) ^  \哈哈！以后还要你多多支持兼容区！