6.2.1.2 Out-of-band LPM The out-of-band LPM shall be as shown in Figure 6-3 for the low-frequency edge, and as shown in Figure 6-4 for the high-frequency edge, where PSDtr1 is the value of the in-band LPM at frequency and PSDtr2 is the value of the in-band LPM at frequency The parameters for these LPMs ftr1 ftr2. are presented in Table 6-4 and Table 6-5, respectively. The out-of-band LPM applies for frequencies below the low-edge transition frequency and for ftr1 frequencies above the high-edge transition frequency The PSD values between the transition ftr2. frequencies and are considered as in-band and defined in clause 6.2.1.1. ftr1 ftr2 Figure 6-3 Low-frequency edge out-of-band limit PSD mask – Requirements for frequencies below 4 kHz are specified in G.993.2 Regional Annexes A, B or C. Figure 6-4 High-frequency edge out-of-band limit PSD mask – Table 6-4 Parameters of low-frequency edge out-of-band LPM – PSDtr1 ftr1 Description (dBm/Hz) (MHz) The PSD limit at transition frequency drops ftr1 from PSDtr1 to 80 dBm/Hz. – The PSD limit in the transition band shall be obtained by linear interpolation in dB over linear frequency scale. 2 65 – The PSD limit between 4 and 20 kHz shall be obtained by linear interpolation in dB over a log(f) scale. Sub-carriers below shall not be used for ftr1 transmission (neither data nor any auxiliary information). Table 6-5 Parameters of high-frequency edge out-of-band LPM – PSDtr2 Transition band, ftr2 Δfth Description (MHz) (dBm/Hz) (MHz) 106 76 20 –
6.2.1.2 Out-of-band LPM The out-of-band LPM shall be as shown in Figure 6-3 for the low-frequency edge, and as shown in Figure 6-4 for the high-frequency edge, where PSDtr1 is the value of the in-band LPM at frequency ftr1 and PSDtr2 is the value of the in-band LPM at frequency ftr2. The parameters for these LPMs are presented in Table 6-4 and Table 6-5, respectively. The out-of-band LPM applies for frequencies below the low-edge transition frequency ftr1 and for frequencies above the high-edge transition frequency ftr2. The PSD values between the transition frequencies ftr1 and ftr2 are considered as in-band and defined in clause 6.2.1.1. Figure 6-3 – Low-frequency edge out-of-band limit PSD mask Requirements for frequencies below 4 kHz are specified in G.993.2 Regional Annexes A, B or C. Figure 6-4 – High-frequency edge out-of-band limit PSD mask Table 6-4 – Parameters of low-frequency edge out-of-band LPM ftr1 (MHz) PSDtr1 (dBm/Hz) Description 2 – 65 The PSD limit at transition frequency ftr1 drops from PSDtr1 to – 80 dBm/Hz. The PSD limit in the transition band shall be obtained by linear interpolation in dB over linear frequency scale. The PSD limit between 4 and 20 kHz shall be obtained by linear interpolation in dB over a log(f) scale. Sub-carriers below ftr1 shall not be used for transmission (neither data nor any auxiliary information). Table 6-5 – Parameters of high-frequency edge out-of-band LPM ftr2 (MHz) PSDtr2 (dBm/Hz) Transition band, Δfth (MHz) Description 106 – 76 20