4.1 Continuous disturbance:连续骚扰
Commutator motors, as well as other devices incorporated in household appliances, electric
tools and similar electrical apparatus may cause continuous disturbance.
Continuous disturbance 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.
4.1.1 Frequency range 148,5 kHz to 30 MHz (terminal voltages)
NOTE The World Administrative Radiocommunications Conference (WARC) has in 1979 reduced the lower
frequency limit in Region 1 to 148,5 kHz; for applications falling in the scope of this standard, tests at 150 kHz are
considered adequate, since 148,5 kHz falls within the receiver bandwidth.
The limits of the terminal disturbance voltages are given in Table 1. Terminal voltages are
measured, in accordance with Clause 5, on each terminal with respect to ground.
Terminals are defined as conductive parts, suitable for re-usable electrical connection to
external circuits.