1、QUESTION ITU-R 221-1/1*Compatibility between radiocommunication systems and high data rate telecommunication systems using wired electrical power supply (2000-2007) The ITU Radiocommunication Assembly, considering a) that electricity power supply continues to be used for low data rate telemetry or c
2、ontrol 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 ban
3、d; d) that any radiation from such systems may affect the use of radiocommunication systems, particularly at LF, MF, HF and VHF, decides that the following Question shall be studied 1 What are the acceptable levels of radiation from telecommunication systems utilising wired electrical power supply s
4、o as not to impair the performance of radiocommunication systems? further decides 1 that the results of the above studies should be included in a Recommendation or a Report; 2 that the studies should be completed by 2012. NOTE 1 See also Question ITU-R 218-1/1. Category: S2 *In the year 2009, Radiocommunication Study Group 1 extended the completion date of studies for this Question.
