1、 Rec. ITU-R BT.1786 1 RECOMMENDATION ITU-R BT.1786*Criterion to assess the impact of interference to the terrestrial broadcasting service (BS) (Question ITU-R 32/6) (2007) Scope The Radio Regulations have established criteria with regard to the amount of interference allowed between the broadcasting
2、 service and other services with a frequency allocation. This Recommendation provides a guideline for an acceptable limit for total interference to the terrestrial broadcasting services that may result from the emissions of radio devices. The ITU Radiocommunication Assembly, considering a) that the
3、terrestrial broadcasting services are protected services; b) that well-established criteria exist in the Radio Regulations (RR) with regard to the amount of interference allowed between the broadcasting service and other services with a frequency allocation in the RR; c) that non-broadcasting radioc
4、ommunication devices may exist with emissions from applications not having a corresponding frequency allocation in the RR, that may occur in the frequency bands allocated to the broadcasting services (such as, for instance, UWB devices, short-range FM modulators, etc.); d) that there is an establish
5、ed protection criteria in Recommendation ITU-R SM.1757 and Report ITU-R SM.2050 for terrestrial broadcasting services restricting interference caused by emissions from ultra-wideband devices; e) that limits must be established for emissions of devices so that the established interference protection
6、criteria for terrestrial broadcasting services will not be violated, recommends 1 that the total interference to systems operating in the broadcasting service, from all sources of interference, as prescribed in the Recommendation mentioned in considering d) above, should at no time exceed one per cent of the total receiving system noise power. *Radiocommunication Study Group 6 made editorial amendments to this Recommendation in 2007 in accordance with Resolution ITU-R 44.
