【正文】 that varies between two consecutive steady states during a time interval short pared to the time scale of interest. 瞬態(tài)（的）：在兩個相鄰狀態(tài)之間變化的物理量或物理現(xiàn)象，其變化時間小于所關注的時間尺度。Incidental radiator: A device that .produces RF energy during the course of its operation, although the device is not intentionally designed to generate or .emit RF energy. Examples of incidental radiators are DC motors and mechanical light switches. 附隨輻射器：并非有意地設計成產生或發(fā)射射頻能量，但在其工作過程中會產生射頻能量的裝置，例如直流電動機和機械電燈開關。Peripheral device: A digital accessory that feeds data into or receives 39。Personal puter: A system containing a host and a limited number of peripherals designed to be used in the home or in small offices, which enables individuals to perform a variety of puting or word processing functions or both, and which typically is of a size permitting it and its peripherals to be located, on a table surface. Note: other definitions given in product standards or applicable regulations may take precedence. 個人計算機：一種包含主機與有限數(shù)量外設的系統(tǒng)，設計成可在家庭或小型辦公室中使用，以便個人能夠完成各種計算或文字處理功能或兩種功能兼?zhèn)?；它的典型尺寸為可將它及其外設放在一張桌面上。）3. 提供數(shù)據(jù)輸出（或送至另一設備或再現(xiàn)數(shù)據(jù)或圖像）。信息技術設備（ITE）：為達到下列一個或多個目的而設計的非故意輻射器設備：1. 接收來自外部源（例如通過數(shù)據(jù)線或鍵盤輸入）的數(shù)據(jù)。Digital device: information technology equipment (ITE) , that fails into the class of unintentional radiators, uses digital techniques and generators, and uses timing signals or pulses at a rate in excess of 9000 pulses per second. 數(shù)字裝置：一種信息技術設備（ITE），屬于采用數(shù)字技術和發(fā)生器一類的非故意輻射器，并采用速率超過每秒9 000個脈沖的時鐘信號或脈沖。）Electromagnetic interference (EMI): Degradation of the performance of a device, equipment, or system caused by an electromagnetic disturbance. 電磁干擾（EMI）：電磁騷擾引起的設備、傳輸通道或系統(tǒng)性能的下降。Degradation (of performance): An undesired departure in the operational performance of any device, equipment, or system from its intended performance. (The term degradation can apply to temporary or permanent failure.) （性能）降低：裝置、設備或系統(tǒng)的工作性能與正常性能的非期望偏離。Unwanted signal: undesired signal: A signal that may impair the reception of awanted signal. 無用信號：可能損害有用信號接收的信號。）Electromagnetic disturbance: Any electromagnetic phenomenon that may degrade the performance of a device, equipment, or system, or adversely affect living or inert matter. (An electromagnetic disturbance may be electromagnetic noise, an unwanted signal, or a change in the propagation medium itself.) 電磁騷擾：任何可能引起裝置、設備或系統(tǒng)性能降低或者對有生命或無生命物質產生損壞作用的電磁現(xiàn)象。能量以電磁波形式在空間傳播。Narrowband radio noise: Radio noise having a spectrum broad in width as pared to the nominal bandwidth of the measuring instrument, and whose spectral ponents are sufficiently close together and uniform that the measuring instrument cannot resolve them. 寬帶無線電噪聲：頻譜寬度比測量儀器標稱帶寬寬的無線電噪聲，其譜分量之間相距足夠近而且均勻，以致測量儀器不能分辨它們。Radio frequency noise: Electromagnetic noise having ponents in the radio frequency range.無線電頻率噪聲：具有無線電頻率分量的電磁噪聲。Natural (atmospheric) noise: Electromagnetic noise having its source in natural (atmospheric) phenomena and not generated by manmade devices.自然（天電）噪聲：來源于自然（天電）現(xiàn)象而非人工裝置產生的電磁噪聲。在給定場所內處于工作狀態(tài)的無線電發(fā)射機產生的電磁場總和。 EMC TerminologyEMC專業(yè)術語BASIC CONCEPTS 基本概念Electromagnetic environment: The totality of electromagnetic phenomena existing at a given location.電磁環(huán)境：存在于給定場所的電磁現(xiàn)象的總和。Radio environment: The electromagnetic environment in the radio frequency range.The totality of electromagnetic fields created at a given location by operation, of radio transmitters. 無線電環(huán)境：無線電頻率范圍內的電磁環(huán)境。Electromagnetic noise: A timevarying electromagnetic phenomenon apparently not conveying information and which may be superimposed or bined with a wanted signal. 電磁噪聲：一種明顯不傳送信息的時變電磁現(xiàn)象，它可能與有用的信號疊加或組合。Man made (equipment) noise: Electromagnetic noise having its source in the manmade devices人為（設備）噪聲：來源于人工裝置的電磁噪聲。Electromagnetic radio noise: The total electromagnetic disturbance plex in which an equipment, subststem, or system may be immersed exclusive of its own electromagnetic contribution.環(huán)境無線電噪聲：可浸沒任一設備、子系統(tǒng)或系統(tǒng)的全部電磁騷擾的合成，其中不包含Narrowband radio noise: Radio noise having a spectrum exhibiting one or more sharp peaks, narrow in width pared to the nominal bandwidth of, and far enough apart to be resolved by, the measuring instruments (or the munication receiver to be protected). 窄帶無線電噪聲：頻譜顯示有一個或多個尖峰且寬度比標稱帶寬窄的無線電噪聲，其標稱帶寬離測量儀器（或已防護的通信接收機）可分辨的帶寬足夠遠。Electromagnetic radiation: The phenomenon by which energy in the form of electromagnetic waves emanates from a source into space. Energy transferred through space in the form of electromagnetic waves. (By extension, the term radiation sometimes also covers induction phenomena.)電磁輻射：能量以電磁波的形式由源發(fā)射到空間的現(xiàn)象。（電磁輻射一詞的含義有時也可引申，將電磁感應現(xiàn)象也包括在內。Radio frequency disturbance: An electromagnetic disturbance having ponents in the radio frequency range. 無線電頻率騷擾：具有無線電頻率分量的電磁騷擾。Interfering signal: A signal that impairs the reception of a wanted signal. 干擾信號：損害有用信號接收的信號。（術語性能降低可用于臨時性或永久性失效。Radio frequency interference (RFI): Degradation of the reception of a wanted signal caused by radio frequency disturbance. 無線電頻率干擾（RFI）：由無線電騷擾引起的有用信號接收性能的下降。Information technology equipment (ITR): Unintentional radiator equipment designed for one or more of the following purposes:1. Receiving data from an external source (such as a data input line or a keyboard)2. Performing some processing functions, of the received data (such as putation, data transformation or recording, filing, sorting, storage, transfer of data)3. Providing a data output (either to other equipment or by the reproduction of data or images) . This definition includes electrical/electronic units or systems that predominantly generate a multiplicity of periodic, binary pulsed electrical/electronic waveforms and are designed to perform data processing functions such as word processing, electronic putation, data transformation, recording, filing, sorting, storage, retrieval and transfer, and reproduction of data as images39。2. 對接收到的數(shù)據(jù)進行某些處理（如計算、數(shù)據(jù)轉換