The ITU Radiocommunication Assembly considering a) that electricity power supply continues to be used for low data rate telemetry or control purposes in LF bands; b) that electricity power supply is generally not designed or installed in such a way that RF radiation will be minimised; c) that new telecommunication systems are being designed which will operate with data rates exceeding 1 Mb/s, with carrier frequencies in the HF band; d) that any radiation from such systems may affect the use of radiocommunication systems, particularly at LF, MF, HF and VHF
ITU-R QUESTION 221-1/1-2007由国际电信联盟 IX-ITU 发布于 2007-01-01。
ITU-R QUESTION 221-1/1-2007 在中国标准分类中归属于: M36 无线电通信设备。
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