Standardized DVB-T2 RF specifications - DigitalEurope

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The wanted signal power should be set to -60dBm at the tuner input, and the impulse noise increased until the picture failure point condition PFP2 is reached. The wanted signal power and the un-gated noise power are then measured (in the bandwidth of the wanted signal) to calculate the I/C. 13- OPERATION WITH FEFS DVB-T2 receivers should be able to operate in a system using FEFs continuously as defined in Table 18 which takes some of its parameters from the DTG D-book (ref.2). All single PLP modes with FEFs use HEM input stage mode, and ISSY. There is no Null Packet Deletion or in band signaling. L1 repetition and auxiliary streams are not used. Demodulating the actual FEF content is not required. Table 18 – Parameters for standard FEF tests Identifier DTG201 DTG202 DTG203 DTG204 DTG205 DTG206 DTG207 Stream Name FEF_1 FEF_2 FEF_3 FEF_4 FEF_5 FEF_6 FEF_7 Overall FEF 40ms FEF 20ms FEF 10ms FEF 5ms FEF 60ms FEF has power equal to T2 frame FFTSIZE 4K 32K 32K 32K 32K 32K 32K FEF 100ms FEF has power equal to T2 frame GI 1/4 1/128 1/128 1/128 1/128 1/128 1/128 Data Symbols 15 59 59 29 15 59 19 SISO/MISO SISO SISO SISO SISO SISO SISO SISO PAPR None None None None None None None Frames per superframe 4 4 2 2 2 4 4 Bandwidth 8MHz 8MHz 8MHz 8MHz 8MHz 8MHz 8MHz Extended Bandwidth Mode No Yes Yes Yes Yes Yes Yes Pilot Pattern PP1 PP7 PP7 PP7 PP7 PP7 PP7 L1 Modulation QPSK BPSK BPSK BPSK BPSK BPSK BPSK FEF Type 0 0 0 0 0 0 0 FEF Length (samples) 78848 365713 182856 91428 45714 550000 914286 FEF Interval 2 4 2 2 2 1 1 FEF P1: S1 Value 2 2 2 2 2 2 2 FEF P1: S2 Value 1 1 1 1 1 1 1 L1 Repetition 0 0 0 0 0 0 0 PLP #0 Type 1 1 1 1 1 1 1 Modulation 16QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM Rate 1/2 2/3 2/3 2/3 2/3 2/3 2/3 >>14 of 27
FEC Type 64800 64800 64800 64800 64800 64800 64800 Rotated QAM Yes Yes Yes Yes Yes Yes Yes FEC blocks per interleaving frame 3 201 201 99 53 201 66 TI blocks per frame (N_TI) 1 3 3 3 1 3 1 T2 frames per Interleaving Frame (P_I) 1 1 1 1 1 1 1 Frame Interval (I_JUMP) 1 1 1 1 1 1 1 Type of time-interleaving 0 0 0 0 0 0 0 Time Interleaving Length 1 3 3 3 1 3 1 Design Delay 114053 667232 667232 335371 540324 667471 673827 Additionally FEFs may be enabled and disabled over time and the FEF content may be changed dynamically. One application of this is to allow interference into the wanted channel to be measured on a live system. A test for this scenario is described below. The receiver should be able to continue normal reception throughout these changes of DVB- T2 signal configuration without requiring a channel rescan, however it is acceptable for the receiver to re-acquire the channel during the transition phases when FEFs are being enabled or disabled, causing a brief interruption in reception. To test receiver conformance, the receiver should be able to acquire and display error free video without requiring a channel re-scan each time the input is switched from a DVB-T2 signal configured as mode 8, to a DVB-T2 signal configured as shown in Table 19, followed by switching back to the original mode 8 input. It is acceptable to have signal breaks during switching if necessary for re-configuring the DVB-T2 modulator and demodulator, but there should be no picture failures after each transition phase once the receiver has re-acquired. Table 19 – Parameters for FEF off/on/off test Parameter Value DVB-T2 mode used for testing Mode 8 with NT2 (number of frames per superframe) changed from 2 to 6 as shown below DVB-T2 signal level at tuner input -50dBm ISSY enabled Yes FEF enabled Yes Frames per superframe (NT2) 6 FEF P1 S1 value 2 FEF P1 S2 value 1 T2 P1 S2 value 1 FEF length 520000 samples or 56.875 ms FEF interval 6 T2 Frames FEF content Empty (zero power) Design Delay 719248 samples >>15 of 27
Page 1 and 2: DIGITALEUROPE White paper: Standard
Page 3 and 4: All single PLP modes use HEM (High
Page 5 and 6: (C/N)0dB_table_44 = 0dB echo C/N fo
Page 7 and 8: 8- 4- Immunity to LTE signals in ot
Page 9 and 10: Table 8 - Immunity to co-channel in
Page 11 and 12: 10- 2- MFN multipath performance 10
Page 13: Test No Pulses per burst Figure 3 -
Page 17 and 18: REFERENCES AND ACKNOWLEDGEMENTS 1.
Page 19 and 20: TS0 TS1 PLP0 PLP1 Common PLP Figure
Page 21 and 22: only only only Frames per superfram
Page 23 and 24: Modulation 256QAM 256QAM 256QAM Rat
Page 25 and 26: Design delay (samples) 939080 93579
Page 27: ABOUT DIGITALEUROPE DIGITALEUROPE r

Standardized DVB-T2 RF specifications - DigitalEurope

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