Standardized DVB-T2 RF specifications - DigitalEurope

(C/N)0dB_table_44 = 0dB echo C/N for genie aided simulation (table 44 of ref.1)
(C/N)AWGN_table_44 = AWGN C/N for genie aided simulation (table 44 of ref.1)
IL(CR) = code rate dependent implementation loss due to additional losses in a 0dB
echo channel. These are 1.0, 1.2, 1.4, 1.6, 1.8, 2.0 dB for 1/2 rate to 5/6 rate
respectively). These have been verified on several different receiver implementations.
7- AWGN C/N PERFORMANCE
The receiver should have the performance given in Table 2 when noise (N) is applied
together with the wanted carrier (C) in a signal bandwidth of 7.61, 7.71 & 7.77 MHz
depending upon mode. The values are calculated using a receiver backstop noise value Px
of -33 dBc. An ideal transmitter is assumed. The DVB-T2 signal is set to -50dBm at the tuner
input.
Table 2 - C/N (dB) for PFP1
Mode Details
Gaussian PFP1
dB
1 8KE QPSK 1/2 1/16 PP4 3.6
2 16KE 16 QAM 2/3 19/128PP3 11.5
3 16KE 64 QAM 2/3 19/256 PP2 16.7
4 16KN 256 QAM 3/5 1/32 PP4 19.5
5 32KN 256 QAM 3/5 1/32 PP4 19.4
6 32KN 256 QAM 3/5 1/8 PP2 19.9
7 32KE 256 QAM 2/3 1/128 PP7 20.3
8 32KE 256 QAM 2/3 1/16 PP4 20.9
9 32KE 256 QAM 3/4 1/32 PP6 22.4
8- IMMUNITY TO ANALOGUE AND DIGITAL SIGNALS IN OTHER CHANNELS
8- 1- General notes for testing
All TV interferer signals are held at a constant at -25dBm at the tuner input whilst the wanted
signal is attenuated until PFP1 is obtained.
The RF signal should be broken after each change in wanted signal level to ensure the
receiver re-acquires. This is to ensure any weaknesses in the receiver acquisition processes
are included in the overall result.
A band pass filter on the interference source is normally needed on N±3 measurements and
beyond to achieve accurate results by reducing out of band interference from the
interference source.
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