The next-to-end point value is 8 dB higher than the end point value and all of these values (1) are subject to an upper limit equal to dB. –67.8 2.2.2 7 and 8 MHz ISDB-T systems For 7 MHz digital television, the OoB domain extends from 3.5 MHz (i.e. 0.5 7 MHz) to MHz (i.e. 7 MHz). 17.5 2.5 For 8 MHz digital television, the OoB domain extends from MHz (i.e. 8 MHz) to 4 0.5 MHz (i.e. 8 MHz). 20 2.5 Spectrum limit masks for 7 MHz and 8 MHz ISDBT systems are shown in Figs 24 and 25 respectively. Tables 18 and 19 provide break points corresponding to Figs 24 and 25, respectively. The relative power level is defined in a reference bandwidth of 4 kHz. The 0 dB reference level corresponds to the mean output power measured in the channel bandwidth. These emission limits apply when transmitter power is above 39 dBW. FIGURE 24 Spectrum limit mask for 7 MHz ISDB-T (for > 39 dBW) P 18 Table of break points corresponding to Fig. 24 for 7 MHz ISDB-T systems Frequency relative to the centre Relative level in a 4 kHz reference of the 7 MHz channel bandwidth (MHz) (dB) –17.5 –82.1 –5.09 –82.1 –3.50 –59.1 –3.34 –52.1 –3.26 –32.1 +3.26 –32.1 +3.34 –52.1 +3.50 –59.1 +5.09 –82.1 +17.5 –82.1 FIGURE 25 Spectrum limit mask for 8 MHz ISDB-T (for > 39 dBW) P
(1) The next-to-end point value is 8 dB higher than the end point value and all of these values are subject to an upper limit equal to –67.8 dB. 2.2.2 7 and 8 MHz ISDB-T systems For 7 MHz digital television, the OoB domain extends from 3.5 MHz (i.e. 0.5 7 MHz) to 17.5 MHz (i.e. 2.5 7 MHz). For 8 MHz digital television, the OoB domain extends from 4 MHz (i.e. 0.5 8 MHz) to 20 MHz (i.e. 2.5 8 MHz). Spectrum limit masks for 7 MHz and 8 MHz ISDBT systems are shown in Figs 24 and 25 respectively. Tables 18 and 19 provide break points corresponding to Figs 24 and 25, respectively. The relative power level is defined in a reference bandwidth of 4 kHz. The 0 dB reference level corresponds to the mean output power measured in the channel bandwidth. These emission limits apply when transmitter power is above 39 dBW. FIGURE 24 Spectrum limit mask for 7 MHz ISDB-T (for P > 39 dBW) 18 Table of break points corresponding to Fig. 24 for 7 MHz ISDB-T systems Frequency relative to the centre of the 7 MHz channel (MHz) Relative level in a 4 kHz reference bandwidth (dB) –17.5 –82.1 –5.09 –82.1 –3.50 –59.1 –3.34 –52.1 –3.26 –32.1 +3.26 –32.1 +3.34 –52.1 +3.50 –59.1 +5.09 –82.1 +17.5 –82.1 FIGURE 25 Spectrum limit mask for 8 MHz ISDB-T (for P > 39 dBW)
R-REC-SM.1541-5-201308-S!!MSW-E.docx