For certain appliances (see Annex A) the click rate N is determined from the formula N = n2 × f /T where n2 is the number of switching operations (see 3.3) during the observation time T and f is a factor given in Annex A, Table A.2.
对某种器具（见附录A）喀呖声率N是由公式N=n2*f/T确定，其中n2是观测时间T内的开关操作数（见3.3）。f是附录A中表A.2给出的因数。
下面把表A.2截图给大家看下
TABLE A.1
TABLE A.2
7.4.2.4 The relevant click limit Lq for discontinuous disturbance is determined in accordance with the formula given in 4.2.2.2.
断续骚扰的相关喀呖声限值Lq按4.2.2.2给出的公式确定。
7.4.2.5 The measurement of disturbance generated by switching operations shall be performed with the same programme as has been chosen when determining the click rate N at the following restricted number of frequencies:
150 kHz, 500 kHz, 1,4 MHz and 30 MHz.
由开关操作产生的骚扰测量应用确定喀呖声率N时已选择的相同的程序并在下列限定数量的频点上进行：
150 kHz, 500 kHz, 1,4 MHz 和 30 MHz.
7.4.2.6 The appliance is assessed for compliance with the higher limit Lq in accordance with the upper quartile method, the appliance being tested for a time not less than the minimum observation time T.
器具按上四分位法评定是否符合较高限值Lq，器具测试的时间应不小于最小观察时间T。
If the click rate N is determined from the number of clicks, the appliance under test shall be deemed to comply with the limit if not more than a quarter of the number of clicks registered during the observation time T exceeds the click limit Lq.
如果器具的喀呖声率N是由喀呖声数确定，若有不多于在最小观测时间T内所记录的喀呖声数的四分之一超过喀呖声限值Lq，则应认为受试器具符合限值。
If the click rate N is determined from the number of switching operations, the appliance under test shall be deemed to comply with the limit if not more than a quarter of the number of switching operations registered during the observation time T produce clicks exceeding the click limit Lq.
如果器具的喀呖声率N是由开关操作数确定，若有不多于在最小观测时间T内所记录的开关操作产生的喀呖声数的四分之一超过喀呖声限值Lq，则认为受试器具符合限值。
NOTE 1 An example of the use of the upper quartile method is given in Annex B.
注1：使用上四分位法的例子由附录B中给出。
NOTE 2 See Annex C for guidance on the measurement of discontinuous disturbance.
注2：有关断续骚扰的测量导则见附录C。
至此，第七章的内容全部结束，第七章主要讲解的是受试器具的工作状态的确定以及测试结果的说明，从测试工程师的角度来说，本表中的第七章才是掌握的重点内容。
