EN 55014-1:2006+A1+A2标注解读 5

If the observed differences between the levels for the respective frequencies during the first and second measurement are 2 dB or less, the first results are retained. If these differences are greater than 2 dB, the measurements of the complete spectrum shall be repeated and the highest level of all measurements at each frequency shall be taken.

如果对各自的频率点的第一次和第二次测量中电平相差2dB或更小，则保留第一次测量结果。如果相差大于2dB，应重复整个频谱的测量并取得每个频率点的最大测量值。

NOTE Further restriction to the relevant critical frequency is permitted for tests on running production.

注：对于连续生产的产品测试，相关主要频率的进一步限制是允许的。

7.4.1.6 The radiated emission limits apply throughout the frequency range from 30 MHz to 1 000 MHz.

辐射发射限值适用的频率范围是30MHz-1000MHz。

7.4.1.7 In the case of average detector measurement on disturbances caused by electronic devices, such as microprocessors, isolated spectral lines may occur, constituted by the fundamental frequency and higher harmonics of the disturbance source.

用平均值检波器对电子装置（如微处理器）引起的骚扰的测量情况下，可能产生有骚扰元的基波和高次谐波组成的独立的谱线。

The values registered with the average detector shall be given at least at all isolated spectral lines.

应至少在所有独立的谱线对应的频率上给出平均值检波器测量值。

7.4.1.8 When an equipment contains only a commutator motor as source of disturbance, average detector measurement need not be carried out.

当器具只包含带换向器电动机作为骚扰源时，则不需要进行平均值检波器测量。

7.4.2 Discontinuous disturbance：断续骚扰

7.4.2.1 The minimum observation time T is obtained at both measuring frequencies (see 7.4.2.2) in the following way:
在两个测量频率点上（见7.4.2.2）按如下方法确定最小观察时间T：

For appliances which do not stop automatically, the shorter time of either:

对不是自动停止的器具，T为下列较短时间

1) the time to register 40 clicks, or, where relevant, 40 switching operations, or

记录40个喀呖声或相关的40次开关操作数，或者

2) 120 min.

120分钟。

For appliances which stop automatically, the duration of the minimum number of complete programmes necessary to produce 40 clicks or, where relevant, 40 switching operations. When, 120 min after the beginning of the test, 40 clicks have not been produced, the test is stopped at the end of the programme in progress.

对自动停止的器具，T是产生40个喀呖声或相关40次开关操作数所需的最少数量的完整程序的持续时间。当试验开始后120min，还没产生40个喀呖声，则运行中的程序结束后停止测试。

The interval between the end of one programme and the start of the next programme shall be excluded from the minimum observation time, except for those appliances for which an immediate re-start is inhibited. For these appliances, the minimum time required to re-start the programme shall be included in the minimum observation time.


一个程序结束到下一个程序开始的间隔应从最小观察时间中扣除，防止立即启动的器具除外。对这些器具，再启动程序所需的最短时间应包括在最小观测时间之内。

7.4.2.2 The click rate N shall be determined under the operating conditions specified in 7.2 and 7.3 or, when not specified, under the most onerous conditions of typical use (maximum click rate) at 150 kHz for the frequency range 148,5 kHz to 500 kHz and at 500 kHz for the frequency range 500 kHz to 30 MHz.

喀呖声率N应在7.2和7.3规定的运行条件下，或当没有规定时，在典型使用中最不利的条件（）最大喀呖声率）确定。148.5kHz-500kHz频段在150kHz上测量，500kHz-30MHz频段在500kHz上测量。

The receiver attenuator is to be set such that an input signal equal in amplitude to the relevant limit L for continuous disturbance produces a mid-scale deflection on the meter.

测量接收机衰减器的设定应使幅度等于连续骚扰限值L的输入信号能在仪表上产生中央刻度的偏移。

NOTE See Clause 10 of CISPR 16-1-1 for more details.

注：见CISPR 16-1-1中第十章。


In the case of instantaneous switching (see 4.2.3.3), the pulse duration shall only be determined at 500 kHz.

对于瞬时开关（见4.2.3.3），只需在500kHz频点上确定脉冲的持续时间。

7.4.2.3 The click rate N is obtained in the following way:

喀呖声率N按下述方法确定：

In general N is the number of clicks per minute determined from the formula N = n1/T, n1 is the number of clicks during the observation time T minutes

一般N是由公式N=n1/T确定的每分钟的喀呖声数，n1是在观测时间T分钟内的喀呖声数。