FIGURE 42 Examples of out-of-band for aeronautical telemetry 2 Other aeronautical-mobile and maritime-mobile transmitters For aeronautical-mobile and maritime-mobile transmitters other than aeronautical telemetry and exempted systems, the required attenuation of the mean power of any emission in the OoB domain, relative to the mean power of the transmitter, is: 50-150% 25 dBc 150-250% 35 dBc FIGURE 43 OoB mask for aeronautical and maritime mobile Annex 12 OoB domain emission limits for the fixed service Recommendation ITU-R F.1191 requires that, for digital radio relay systems, operating on a specific radio-frequency channel arrangement, the frequency boundaries between spurious and OoB domains are 250% of the relevant channel separation (CS). Therefore, for the purpose of this Recommendation, the OoB domain emission limits of analogue and digital fixed service systems are defined, whenever applicable, up to the 250% of the relevant CS of the radiofrequency channel arrangement where the system is to be placed. According to Recommendation ITU-R F.1191, the CS is taken as for alternated frequency XS/2 channel arrangements and for co-channel and interleaved frequency channel arrangements as XS defined by Recommendation ITU-R F.746. Where exclusive block assignments (see Note 1) are made, transmitters operating on sub-channels devised by the licensed operator could, in principle, be exempted, within the block, by the unwanted emissions limit required to be met outside the block; however at country borders this should require agreement between the administrations concerned due to the fact that they may have licensed the band in a different way. The spectrum masks specified in this annex are intended as generic limits, which generally constitute the least restrictive OoB emission limits successfully used as national or regional regulations. These are sometimes called safety net limits. They are intended for use in bands where tighter masks are not otherwise required to protect specific applications. These masks are a composite maximum limit for any application and frequency band of deployment in any climatic zone; however actual spectrum masks are usually designed more tightly according
FIGURE 42 Examples of out-of-band for aeronautical telemetry 2 Other aeronautical-mobile and maritime-mobile transmitters For aeronautical-mobile and maritime-mobile transmitters other than aeronautical telemetry and exempted systems, the required attenuation of the mean power of any emission in the OoB domain, relative to the mean power of the transmitter, is: 50-150% 25 dBc 150-250% 35 dBc FIGURE 43 OoB mask for aeronautical and maritime mobile Annex 12 OoB domain emission limits for the fixed service Recommendation ITU-R F.1191 requires that, for digital radio relay systems, operating on a specific radio-frequency channel arrangement, the frequency boundaries between spurious and OoB domains are 250% of the relevant channel separation (CS). Therefore, for the purpose of this Recommendation, the OoB domain emission limits of analogue and digital fixed service systems are defined, whenever applicable, up to the 250% of the relevant CS of the radiofrequency channel arrangement where the system is to be placed. According to Recommendation ITU-R F.1191, the CS is taken as XS/2 for alternated frequency channel arrangements and XS for co-channel and interleaved frequency channel arrangements as defined by Recommendation ITU-R F.746. Where exclusive block assignments (see Note 1) are made, transmitters operating on sub-channels devised by the licensed operator could, in principle, be exempted, within the block, by the unwanted emissions limit required to be met outside the block; however at country borders this should require agreement between the administrations concerned due to the fact that they may have licensed the band in a different way. The spectrum masks specified in this annex are intended as generic limits, which generally constitute the least restrictive OoB emission limits successfully used as national or regional regulations. These are sometimes called safety net limits. They are intended for use in bands where tighter masks are not otherwise required to protect specific applications. These masks are a composite maximum limit for any application and frequency band of deployment in any climatic zone; however actual spectrum masks are usually designed more tightly according
R-REC-SM.1541-3-201101-S!!MSW-E.docx