2.2 Digital television systems 2.2.1 7 and 8 MHz DVB-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).   For both 7 MHz and 8 MHz digital television, a 4 kHz measurement bandwidth is used to measure unwanted emission levels. The 0 dB reference level corresponds to the mean output power measured in the channel bandwidth. Spectrum limit masks for 7 MHz and 8 MHz DVB-T systems are shown in Figs 22 and 23 respectively. Each graph is drawn to represent the spectrum limits for transmitters in the output power range 39 dBW to 50 dBW. Associated with each graph is a table of break points and a table of end point and next-to-end point values, together with the corresponding spurious levels, for a range of transmitter output powers. FIGURE 22 Spectrum limit mask for 7 MHz DVB-T systems (for = 39 to 50 dBW) P Table 14 provides break points corresponding to Fig. 22, for 7 MHz DVB-T systems. TABLE 14 Break points for 7 MHz DVB-T systems Relative level in 4 kHz measurement Frequency relative to the centre of the bandwidth 7 MHz channel (dB) –17.5 –99 –10.5 –91 –3.7 –67.2 –3.35 –32.2 3.35 –32.2 3.7 –67.2 10.5 –91 17.5 –99 Table 15 provides end point value and next-to-end point values to be used in conjunction with Fig. 22 and Table 14, applicable a range of transmitter output powers, for 7 MHz DVBT systems.
2.2 Digital television systems 2.2.1 7 and 8 MHz DVB-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). For both 7 MHz and 8 MHz digital television, a 4 kHz measurement bandwidth is used to measure unwanted emission levels. The 0 dB reference level corresponds to the mean output power measured in the channel bandwidth. Spectrum limit masks for 7 MHz and 8 MHz DVB-T systems are shown in Figs 22 and 23 respectively. Each graph is drawn to represent the spectrum limits for transmitters in the output power range 39 dBW to 50 dBW. Associated with each graph is a table of break points and a table of end point and next-to-end point values, together with the corresponding spurious levels, for a range of transmitter output powers. FIGURE 22 Spectrum limit mask for 7 MHz DVB-T systems (for P = 39 to 50 dBW) Table 14 provides break points corresponding to Fig. 22, for 7 MHz DVB-T systems. TABLE 14 Break points for 7 MHz DVB-T systems Frequency relative to the centre of the 7 MHz channel Relative level in 4 kHz measurement bandwidth (dB) –17.5 –99 –10.5 –91 –3.7 –67.2 –3.35 –32.2 3.35 –32.2 3.7 –67.2 10.5 –91 17.5 –99 Table 15 provides end point value and next-to-end point values to be used in conjunction with Fig. 22 and Table 14, applicable a range of transmitter output powers, for 7 MHz DVBT systems.
R-REC-SM.1541-3-201101-S!!MSW-E.docx