BS 800:1988 download.British Standard Specification for limits and methods of measurement of radio interference characteristics of household electrical appliances, portable tools and similar electrical apparatus.
Amendment 1 to the English version of CENELEC EN 55 014
This amendment is based on the decision taken by the CENELEC Technical Committee CISPR during its
meeting held in November 1986 in Frankfurt.
The changes to be made to the EN text are as follows.
4.1 Continuous interference
Add at the end of the existing text the following new paragraphs:
Continuous interference may be either broadband, caused by switching devices such as mechanical switches, commutators, and semiconductor regulators. or may be narrowband, caused by electronic control devices such as microprocessors.
Broadband interference is measured with a measuring receiver including a quasi-peak detector as described in Section One of CISPR Publication 16(1977).
Narrowband interference is measured with a CISPR measuring receiver in which the quasi-peak detector is replaced by an average detector. The average detector shall comply with Clause 23 of CISPR Publication 16.
Note. The hmit for narrowband interference are tentative and may be relaxed or restricted after a period of experience.
4.1.1 Frequency range 0.15 MHz to 30MHz (terminal voltages) Delete the text of the first paragraph.
4.1.2 Frequency range 30 MHz to 300 MHz (interference power) Delete the text of the first paragraph.