FCC認(rèn)證標(biāo)準(zhǔn)Part15 B中B代表的意思

準(zhǔn)確的說(shuō) FCC Part 15 B應(yīng)該是FCC Part 15 Class B（B級(jí)數(shù)字裝置）。
Class A和Class B的定義：
Class A digital device－A級(jí)數(shù)字裝置
A digital device that is marketed for use in a commer cial, industrial or business 
environment, exclusive of a device which is marketed for use by the general public 
or is intended to be used in the home.投放市場(chǎng)供在商業(yè)、工業(yè)或商務(wù)環(huán)境中使用的數(shù)字裝置，但不包括投放市場(chǎng)供一般公眾或家庭使用的裝置。
Class B digital device－B級(jí)數(shù)字裝置
Class B digital device. A digital device that is marketed for use in a residential 
environment notwithstanding use in commercial, business and industrial 
environments. Examples of such devices include, but are not limited to, personal 
computers, calculators, and similar electronic devices that are marketed for use by 
the general public. Note: The responsible party may also qualify a device intended 
to be marketed in a commercial, business or industrial environment as a Class B 
device, and in fact is encouraged to do so, provided the device complies with the 
technical specifications for a Class B digital device. In the event that a particular 
type of device has been found to repeatedly cause harmful interference to radio 
communications, the Commission may classify such a digital device as a Class B 
digital device, regardless of its intended use。

　下面是FCC PART 15目錄章節(jié)內(nèi)容：
Subpart A – General（一般要求）
Subpart B - Unintentional Radiators（無(wú)意輻射體）
Subpart C - Intentional Radiators（有意輻射體）
Subpart D - Unlicensed Personal Communications Service Devices
Subpart E - Unlicensed National Information Infrastructure Devices
Subpart F – Ultra-Wideband Operation
Subpart G – Access Broadband Over Power Line (Access BPL)

   投放市場(chǎng)不僅供在商業(yè)、工業(yè)或商務(wù)環(huán)境中使用而且要在居住環(huán)境中使用的數(shù)字裝置。這類裝置的例子包括（但不限于）：個(gè)人計(jì)算機(jī)、計(jì)算器以及其它投放市場(chǎng)供一般公眾使用的類似電子裝置。注：職責(zé)部門也可以把投放市場(chǎng)以供商業(yè)、工業(yè)或商務(wù)環(huán)境中使用的裝置定義為B級(jí)裝置；事實(shí)上FCC也鼓勵(lì)這一舉措，只要該裝置能滿足B級(jí)裝置的技術(shù)規(guī)范。若某類型裝置反復(fù)地對(duì)無(wú)線電通訊產(chǎn)生有害干擾，則FCC可能會(huì)將之歸為B級(jí)數(shù)字裝置而不管其用途如何。