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DIGITALEUROPE Rue de la Science, 14>> B-1040 Brussels [Belgium] T. +32 2 609 53 10 >>F. +32 2 609 53 39 www.digitaleurope.org Transparency register member for the Commission: 64270747023-20
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Brussels, April 17, 2012
DIGITALEUROPE White paper:
Standardized DVB-T2 RF specifications
DIGITALEUROPE represents the digital technology industry in Europe. Our 100+ members
include some of the world’s largest IT, telecommunications and consumer electronics
companies, as well as national associations from every part of Europe.
This paper summarises recent work of the DIGITALEUROPE E-book RF group on defining a
minimum RF specification for DVB-T2 receivers. Some of the specification is derived from
work carried out in the UK DTG D-Book RF group but it also includes new test areas not
covered by other DVB-T2 RF specifications. The aim is to show the current best practice for
DVB-T2 receiver specification and testing. The specification has been verified on recent
DVB-T2 receivers. It is hoped this white paper will assist countries rolling out new T2
services. This specification will eventually be published as an update to the IEC 62216 E-
Book.
1- DVB-T2 MODES
DVB-T2 is a very flexible physical layer standard with many configuration options.
Unfortunately this very flexibility makes standardising on common operating modes difficult
due to the large number of possible mode combinations. To keep receiver compliance testing
time within reasonable limits, we have defined a subset of 9 modes for detailed performance
testing in difficult channels (Table 1). These modes cover many important areas of
functionality in the DVB-T2 specification. In addition it is expected that the receiver should be
able to demodulate an impairment free signal with all the following options from the DVB-T2
specification (EN 302 755). Receivers should be able to automatically detect the mode being
received when channel scanning.
Constellation (QPSK, 16-QAM, 64-QAM, 256QAM, rotated or normal)
Code rate (1/2, 3/5, 2/3, 3/4, 4/5 or 5/6),
Guard interval (1/4, 1/8, 1/16, 1/32, 1/128, 19/256, 19/128),
Transmission modes (1K, 2K, 4K, 8K, 16K, 32K),
Extended carrier modes (8K, 16K and 32K only)
Pilot patterns PP1-PP7
SISO and MISO
HEM (high efficiency) and normal modes
Normal and short FEC frames
7 and 8 MHz bandwidths
Single and multiple PLP modes
>>2 of 27
Most of these options can be tested using large sets of functional tests, however any
changes to the DVB-T2 mode chosen for broadcasting must also be RF performance tested
with the legacy receiver population to ensure a smooth transition.
Table 1 – Selected DVB-T2 modes for performance testing
Mode: 1 2 3 4 5 61 7 8 9
Test
Coverage
AWGN & Static 0dB Echo Tests All Performance Tests
CCI Tests with modes 4 & 5
SFN SFN MFN SFN SFN
FFTSIZE
E=Ext. N=Normal 8KE 16KE 16KE 16KN 32KN 32KN 32KE 32KE 32KE
GI 1/16 19/128 19/256 1/32 1/32 1/8 1/128 1/16 1/32
LF 252 120 118 128 62 44 60 62 62
SISO/MISO SISO SISO SISO SISO SISO/
(MISO)2 SISO SISO SISO SISO
PAPR None TR None TR TR TR None TR TR
Frames per
superframe (NT2) 2 2 2 2 2 2 2 2 2
Channel
Bandwidth (MHz) 8 8 8 8 8 7 8 8 8
Signal
Bandwidth (MHz) 7.71 7.77 7.77 7.61 7.61 7.61 7.77 7.77 7.77
Pilot Pattern PP4 PP3 PP2 PP4 PP4 PP2 PP7 PP4 PP6
L1 Modulation QPSK 16QAM 64QAM 64QAM 64QAM 64QAM 64QAM 64QAM 64QAM
PLP #0
Type 1 1 1 1 1 1 1 1 1
Modulation QPSK 16QAM 64QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM
Rate 1/2 2/3 2/3 3/5 3/5 3/5 2/3 2/3 3/4
FEC Type 64800 64800 64800 64800 64800 64800 64800 64800 64800
Rotated QAM Yes Yes Yes Yes Yes Yes Yes Yes Yes
FEC blocks per
interleaving frame 51 96 138 202
196/
(195) 132 202 200 204
TI blocks per
frame (N_TI) 3 3 3 3 3 2 3 3 3
T2 frames per
Interleaving
Frame (P_I)
1 1 1 1 1 1 1 1 1
Frame Interval
(I_JUMP) 1 1 1 1 1 1 1 1 1
Type of time-
interleaving 0 0 0 0 0 0 0 0 0
Time Interleaving
Length 3 3 3 3 3 2 3 3 3
Data Rate Mbit/s 6.8601 16.7738 26.2131 33.1148 33.1667/(
32.9974) 25.2380 40.2146 36.5519 43.2113
Sensitivity dBm
(NF=7dB) -94.5 -86.6 -81.4 -78.7 -78.8 -78.8 -77.8 -77.2 -75.7
1 Note performance testing for the 7MHz mode 6 should use frequencies in VHF band III.
2 When mode 5 is used in MISO mode, the number of FEC blocks per interleaving frame needs to be set to 195
instead of the SISO value of 196.
>>3 of 27
All single PLP modes use HEM (High Efficiency) input stage mode. There is no null packet
deletion, in-band signaling, L1 repetition or auxiliary streams. In order to comply with v1.2.1
of the DVB-T2 specification, ISSY should be used in all but the simplest of modes and so the
use of ISSY is explicitly indicated in this document where it is required. Network operators
should be aware that some signal configurations allowed by version 1.1.1 but prohibited by
version 1.2.1 might not be correctly received and decoded by receivers designed to the later
versions. It is therefore recommended that only parameter combinations permitted by version
1.2.1 and later be used. The L1 signaling may however be transmitted according to version
1.1.1.
To reduce receiver testing times, modes 1-4 in Table 1 are only tested for basic AWGN and
0dB echo C/N, and mode 4 is additionally used for co-channel ATV interference testing.
Modes 5-9 represent more commonly used SFN and MFN modes and are specified with all
the performance tests.
2- RF FREQUENCIES
This specification covers operation in VHF band III (7MHz channel bandwidth) and/or UHF
bands IV and V (8MHz channel bandwidth). Receivers should be able to operate with
transmission network frequency errors of up to +/-50 KHz, and channel bandwidths of 7
and/or 8MHz.
3- FAILURE POINT CRITERIA
Due to the sharp “cliff-edge” BER characteristic of LDPC decoding, BER measurements are
very time consuming to perform for DVB-T2 measurements, but picture failure
measurements are easier to make than for DVB-T. For this reason, two different picture
failure point criteria are defined for different tests:
1. Picture failure point1 (PFP1), defined as the minimum C/N or C/I value when two out
of three 10-second periods are free from picture artefacts.
2. Picture failure point2 (PFP2), defined as the minimum C/N or C/I value when two out
of three 20-second periods are free from picture artefacts. This reduces the
probability of incorrect results when testing DVB-T2 impulse noise immunity for
patterns 7-12 which have a long burst repetition period of 1000 ms.
4- MINIMUM RECEIVER SIGNAL INPUT LEVELS
The receiver should have a noise figure equal or better than 7 dB. The required minimum input signal levels (P min) for PFP1 are:
P min = -98.1 dBm + C/N [dB ] [for 8 MHz modes 1-3, 7-9 ] P min = -98.2 dBm + C/N [dB ] [for 8 MHz modes 4-5 ] P min = -98.7 dBm + C/N [dB ] [for 7 MHz mode 6]
where C/N is specified in Table 2
>>4 of 27
5- MAXIMUM RECEIVER INPUT LEVEL
The receiver should be able to handle DVB-T2 signals up to a level of -25 dBm while
providing the specified performance. Maximum level for ATV/DTV interfering signals is
-25dBm.
6- C/N PERFORMANCE CALCULATION METHOD FOR AWGN AND 0dB ECHO
The DVB-T2 implementation lines in the A133 Blue Book (ref.1) show two sets of simulations
in tables 44 and 47. The simulations in table 44 represent the absolute best possible
theoretical performance assuming a theoretical receiver that can perform “Genie Aided” de-
mapping (an infinite number of de-mapping iterations). Table 44 also assumes an infinite
number of LDPC iterations. Clearly neither of these two assumptions is valid for a real
receiver due to finite limits on clock rate and silicon area. In contrast table 47 shows
simulated performance for a receiver using a non-iterative de-mapper and 50 LDPC
iterations (see also section 10.5.5 of ref.1). Table 47 is used to calculate the required AWGN
C/N in this specification. However because table 47 does not include 0dB echo simulations
but table 44 does, both these sets of simulation results are used derive the required C/N
performance in 0dB echo channels as shown below.
6- 1- AWGN C/N calculation
C/N = (C/N)table_47 + A + Pboost+ IL + Dpx, where
(C/N)table_47 = AWGN C/N for post LDPC BER=10-6 (table 47 of ref.1)
A = additional C/N required to reach post LDPC BER=10-7 – around 0.1dB
Pboost= correction for pilot boosting (from table 46 of ref.1)
IL = loss due to real channel estimation, imperfect LDPC decoding and other
imperfections not considered part of the back-stop noise. This is derived from ref.1
and includes a small additional allowance for receiver synchronization, fixed point
losses etc. For the E-book specification IL varies with pilot pattern as follows 2.5dB
(PP1-PP2), 2.0dB (PP3-PP4), 1.5dB (PP5-PP7).
Dpx= additional C/N term corresponding to a back-stop noise level at -33 dBc. This
term is derived by first calculating the sum of all terms except Dpx and then checking
how much C/N degradation is caused by the -33 dBc backstop noise level. The term
Dpx is identical to this degradation.
6- 2- 0dB echo C/N calculation
C/N0db = (C/N)table_47 +[END of 0dB echo channel] + A + Pboost+ IL+IL(CR) + Dpx
= (C/N)table_47 +[(C/N)0dB_table_44 – (C/N)AWGN_table_44] + A + Pboost+ IL+IL(CR) + Dpx, where
(C/N)table_47, A, Pboost, IL and Dpx as defined above for the AWGN C/N calculation
END = effective noise degradation (difference between 0dB echo and AWGN C/N)
>>5 of 27
(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.
>>6 of 27
8- 2- Immunity to analogue signals in other channels
The immunity for interference from analogue TV signals in adjacent and non-adjacent
channels is specified as the maximum ratio of the interference to wanted signal (I/C) for
reception (PFP1).
Table 3 shows recommended I/C levels for different types of analogue TV interference.
Table 3 – Immunity to analogue signals on other channels (I/C PFP1)
Mode N±1
PAL G PAL I1
N±1 PAL B3
N-1 SECAM L PAL D14
N+1 SECAM L
PAL D14
N±m (m1)
andN+95 SECAM L
PAL D14
N±m (m1) and image
channel5
PAL B/G/I15
Bandwidth: 8 MHz 7 MHz 8 MHz 8 MHz 8 MHz 7/8 MHz
5 – 32KN 256Q 3/5 1/32 PP4 8MHz
36 28 30 43 44
6 – 32KN 256Q 3/5 1/8 PP2 7MHz
32 43
7 – 32KE 256Q 2/3 1/128 PP7 8MHz
35 27 29 42 43
8 – 32KE 256Q 2/3 1/16 PP4 8MHz
34 26 28 41 42
9 – 32KE 256Q 3/4 1/32 PP6 8MHz
33 25 27 40 41
8- 3- Immunity to DTT signals in other channels
The immunity for interference from digital TV signals in adjacent and non-adjacent channels
is specified as the maximum ratio of the interference to wanted signal (I/C) for reception
(PFP1). Table 4 shows recommended I/C levels for DVB-T/T2 interference.
Note immunity to digital signals in other channels should use a DVB-T or non-extended DVB-
T2 interferer for the 7MHz mode and an extended DVB-T2 mode interferer for 8MHz modes.
Table 4 – Immunity to digital signals on other channels (I/C PFP1)
Mode N±1 N±2 N±3 N±m (m1, m>3)
except N+95
N+95
5 – 32KN 256Q 3/5 1/32 PP4 8MHz 27 37 42 45 30
6 – 32KN 256Q 3/5 1/8 PP2 7MHz 26 36 41 44 29
7 – 32KE 256Q 2/3 1/128 PP7 8MHz 26 36 41 44 29
8 – 32KE 256Q 2/3 1/16 PP4 8MHz 25 35 40 43 28
9 – 32KE 256Q 3/4 1/32 PP6 8MHz 24 34 39 42 27
3 Note that if PAL B N-1 is using NICAM sound, the digital channel on N cannot be used without an offset,
because of the overlapping spectrums. The offset to be used in this test is recommended to be +167KHz on
the wanted signal.
4 Note that the figures for PAL D1 are provisional. Performance for PAL D/K is similar to D1.
5 Note that N+9 is a popular choice for the image channel in tuner designs using 36MHz IF for 8MHz channel
systems. For 7MHz systems, the image channel is N+10 (70MHz).
>>7 of 27
8- 4- Immunity to LTE signals in other channels
Figure 1 shows the harmonized 800MHz spectrum organization for LTE deployment. There
is only a small 1 MHz guard band between the top TV channel 60 and the lowest LTE base
station in block A. Also the LTE handset (UE) block C falls on the N+9 image channel of TV
tuner designs employing a 36MHz IF frequency. It is important to test immunity to these
types of adjacent channel interference. Recent tests on existing DTT receivers have shown
the most challenging form of interference for some receivers is when the LTE interferer is
bursty – typical of a lightly loaded or idling LTE network. Signals captured from a real LTE
base station (BS) and handset (UE) are used as interference sources to test that receivers
provide a reasonable level of immunity against this type of bursty interference. The I/C
specification set in Table 5 is designed to reject badly behaving receivers. These interference
signals are in the following files available on the DIGITALEUROPE website:
Base Station: LTE_BS-idle_V2.wv (a lightly loaded 10MHz LTE BS signal consisting
mainly of synchronisation and broadcast signals)
Handset : LTE_UE_1Mbs_V2.wv (a lightly loaded 10MHz LTE UE signal with 1Mbit/s
data traffic)
Figure 1– Harmonised 800MHz spectrum for LTE Deployment
766-774 MHz
DTT CH58
774-782 MHz
DTT CH59
782-790 MHz
DTT CH60
1 MHzGuard Band
791-796 MHz
796-801 MHz
801-806 MHz
806-811 MHz
811-816 MHz
816-821 MHz
821-832 MHz
832-837 MHz
837-842 MHz
842-847MHz
847-852 MHz
852-857 MHz
857-862 MHz
Downlink (BS)6 blocks of 5MHz or 3 blocks of 10 MHz
Uplink (UE)6 blocks of 5MHz or 3 blocks of 10 MHz
11 MHzDuplex Gap
10 MHz BS Block A
10 MHz BS Block B
10 MHz BS Block C
10 MHz UE Block A
10 MHz UE Block B
10 MHz UE Block C
Table 5 – Immunity to LTE signals on other channels (I/C PFP1)
Mode Note : Wanted signal centre at
786 MHz
BS-A (796 MHz)
BS-B (806 MHz)
UE-A (837 MHz)
UE-C (757 MHz)
Interferer power at tuner input(measured during
active part of LTE signal)6
5 – 32KN 256Q 3/5 1/32 PP4 8MHz 30 dB 30 dB 30 dB 30 dB -15 dBm
7 – 32KE 256Q 2/3 1/128 PP7 8MHz 30 dB 30 dB 30 dB 30 dB -15 dBm
8 – 32KE 256Q 2/3 1/16 PP4 8MHz 30 dB 30 dB 30 dB 30 dB -15 dBm
9 – 32KE 256Q 3/4 1/32 PP6 8MHz 30 dB 30 dB 30 dB 30 dB -15 dBm
6 Note the power of the LTE BS and UE signal is defined as the RMS power during the active part of
the signal. To assist setting the power level of the LTE BS_idle downlink signal, the RMS power
measured by a power meter shall be set approximately 8.3 dB lower (e.g. -23.3dBm). Similarly for
the LTE UE_1Mbs signal, the RMS power measured by a power meter shall be set approximately
9.7 dB lower (e.g. -24.7 dBm).
>>8 of 27
8- 5- Immunity to pattern L3
This is a tuner linearity test with one digital DVB-T signal on the N+4 channel and another
digital DVB-T signal on the N+2 channel in addition to the wanted DVB-T2 signal on channel
N. This type of test is becoming increasingly important in today’s crowded spectrum.
The DVB-T2 receiver should provide the PFP1 when the unwanted signals are at the highest
allowed level (-25dBm at the tuner input) and the wanted signal is I/C dB lower, where I/C is
given in Table 6.
Table 6 – Immunity to Pattern L3 (I/C PFP1)
Mode I/C [N+2 and N+4]
5 – 32KN 256Q 3/5 1/32 PP4 8MHz 28
6 – 32KN 256Q 3/5 1/8 PP2 7MHz 27
7 – 32KE 256Q 2/3 1/128 PP7 8MHz 27
8 – 32KE 256Q 2/3 1/16 PP4 8MHz 26
9 – 32KE 256Q 3/4 1/32 PP6 8MHz 25
9- IMMUNITY TO CO-CHANNEL INTERFERENCE
9- 1- Immunity to co-channel interference from analogue TV signals
The immunity for interference from co-channel analogue TV-signals is specified as the
maximum ratio of the interference to wanted signal (I/C) for reception (PFP1). The wanted
DVB-T2 signal should be set to -50 dBm at the tuner input.
Table 7 – Immunity to co-channel interference7 from analogue signals (I/C PFP1)
Mode PAL-I1 PAL B PAL G/D1 SECAM-L
4 – 16KN 256Q 3/5 1/32 PP4 8MHz -5 -5 -6
5 – 32KN 256Q 3/5 1/32 PP4 8MHz -5 -5 -6
6 – 32KN 256Q 3/5 1/8 PP2 7MHz -6
7 – 32KE 256Q 2/3 1/128 PP7 8MHz -6 -6 -7
8 – 32KE 256Q 2/3 1/16 PP4 8MHz -7 -7 -8
9 – 32KE 256Q 3/4 1/32 PP6 8MHz -8 -8 -9
9- 2- Immunity to co-channel DAB interference
The immunity for co-channel interference from a single 1.7MHz wide DAB signal in the
centre of the wanted channel is specified as the maximum ratio of the interference to wanted
signal (I/C) for reception (PFP1). Only two modes are specified to reduce testing. The
wanted DVB-T2 signal should be set to -50 dBm at the tuner input.
7 Note that the CCI interference generator should have its frequency reference locked to the DVB -
T/T2 signal generator in order to obtain repeatable measurement results.
>>9 of 27
Table 8 – Immunity to co-channel interference from a single 1.7MHz DAB signal (I/C PFP1)
Mode I/C dB
6 – 32KN 256Q 3/5 1/8 PP2 7MHz -4
8 – 32KE 256Q 2/3 1/16 PP4 8MHz -5
10- MULTIPATH PERFORMANCE
10- 1- SFN multipath performance
10- 1- 1- Static 0dB echo
The required C/N for picture failure point PFP1 should be obtained when the channel
contains two paths with relative delays as shown in Table 9. All paths have zero phase at the
channel centre.
The DVB-T2 signal should be set to -50 dBm at the tuner input.
Table 9 – C/N Requirements for 0dB Echo (PFP1)
Mode Echo Delay
1.95 µsec 95% Guard Interval
C/N dB C/N dB
1 - 8KE QPSK 1/2 1/16 PP48MHz 5.3 5.3
2 - 16KE 16 QAM 2/3 19/128 PP38MHz 14.5 14.5
3 - 16KE 64 QAM 2/3 19/256 PP28MHz 20.2 20.2
4 - 16KN 256 QAM 3/5 1/32 PP48MHz 23.2 23.2
5 – 32KN 256Q 3/5 1/32 PP48MHz 23.2 23.2
6 – 32KN 256Q 3/5 1/8 PP2 7MHz 23.6 23.6
7 – 32KE 256Q 2/3 1/128 PP7 8MHz 24.5 24.5
8 – 32KE 256Q 2/3 1/16 PP4 8MHz 25.2 25.2
9 – 32KE 256Q 3/4 1/32 PP6 8MHz 27.4 27.4
10- 1- 2- Variable power echo
The required C/N for picture failure point (PFP1) shown in Table 10 should be obtained when
the channel contains two paths with relative delays shown in Table 11, where the relative
power level of the two paths are dynamically changing including 0dB echo level crossing.
The C/N value is defined at the 0dB level crossing. On a typical channel simulator, a
frequency separation of 0.1Hz would be selected as 0.1Hz “pure doppler”. All paths have
zero phase at the channel centre.
The DVB-T2 signal should be set to -50 dBm at the tuner input.
>>10 of 27
Table 10 – C/N Requirements for Varying Echo Power Levels (PFP2)
Mode C/N dB
5 – 32KN 256Q 3/5 1/32 PP4 8MHz 26.2
6 – 32KN 256Q 3/5 1/8 PP2 7MHz 26.6
7 – 32KE 256Q 2/3 1/128 PP7 8MHz 27.5
8 – 32KE 256Q 2/3 1/16 PP4 8MHz 28.2
9 – 32KE 256Q 3/4 1/32 PP6 8MHz 30.4
Table 11 – Definition of Varying Echo Power Channel
Path No Relative Power (dB)
Delay Frequency Separation
1 0 0 None
2 0 95% GI None
3 -1 95% GI Pure 0.1Hz
10- 1- 3- Performance with echoes outside the guard interval
This test checks performance in the presence of either a single pre-echo or a single post-
echo outside the guard interval, with the main path at zero delay. This is important in SFN
networks where it is possible to receive low level echoes outside the guard interval in certain
situations.
For the modes shown in Table 12, the attenuation of the single echo at the specified delay
points is measured to achieve PFP1. The receiver should achieve PFP1 with the echo level
greater than or equal to that shown in Table 12. All echoes have zero phase at channel
centre. No noise is added. The DVB-T2 signal should be set to -50 dBm at the tuner input.
For 7MHz channels, multiply the delay times in the tables by 8/7.
Table 12 – Long echo test profile (Echo Level for PFP1)
Mode Delay and Echo Level
5 – 32KN 256Q 3/5 1/32 PP4 8MHz Delay µs ±120 ±150 ±200 ±230 ±266
Echo level dB -2 -5 -8.5 -10 -11
6 – 32KN 256Q 3/5 1/8 PP2 7MHz Delay µs ±540 ±560 ±580 ±600 ±608
Echo level dB -4 -6 -7.5 -8.5 -9
7 – 32KE 256Q 2/3 1/128 PP7 8MHz Delay µs ±30 ±60 ±90 ±120 ±133
Echo level dB -2 -5.5 -8 -10 -10.5
8 – 32KE 256Q 2/3 1/16 PP4 8MHz Delay µs ±230 ±240 ±250 ±260 ±266
Echo level dB -2 -3.5 -5.5 -6.5 -7
9 – 32KE 256Q 3/4 1/32 PP6 8MHz Delay µs ±115 ±120 ±125 ±130 ±133
Echo level dB -2 -3 -4.5 -5.5 -6
>>11 of 27
10- 2- MFN multipath performance
10- 2- 1- Performance with short echoes
The receiver should provide PFP1 for the C/N values shown in Table 14 when the channel
profile in Table 13 is applied. All paths have zero phase at the channel centre. The DVB-T2
signal should be set to -50 dBm at the tuner input.
Note that due to the short echo delays in Table 13, some test equipment does not report
back the correct C/N.
Table 13 – Short echo test profile
Tap Delay (µs) Relative Attenuation (dB)
1 0 2,8
2 0,05 0
3 0,4 3,8
4 1,45 0,1
5 2,3 2,6
6 2,8 1,3
Table 14 – C/N Requirements for Short Echo Profile (PFP1)
Mode C/N dB
5 – 32KN 256Q 3/5 1/32 PP4 8MHz 21.5
6 – 32KN 256Q 3/5 1/8 PP2 7MHz 22.0
7 – 32KE 256Q 2/3 1/128 PP7 8MHz 22.7
8 – 32KE 256Q 2/3 1/16 PP4 8MHz 23.4
9 – 32KE 256Q 3/4 1/32 PP6 8MHz 25.7
11- PERFORMANCE IN TIME VARYING CHANNELS
Receivers should handle expected time variations of paths to fixed roof-top reception. Such
variation is caused by the swaying of masts, antennas and branches of trees etc. Normally
the required C/N increases with frequency separation as shown in Figure 2.
The increase in required C/N for PFP1 reception should be less than or equal to the Δvalue
shown in Table 15 for a 20μs 0dB echo with 0º phase at the channel centre using the
frequency separation shown, when compared to a 20μs 0dB echo with frequency separation
equal to 1 Hz (Doppler shift of +/- 0.5Hz after AFC). The DVB-T2 signal should be set to -50
dBm at the tuner input.
Note: On a typical channel simulator, a frequency separation of 10Hz corresponds to a “Pure
Doppler” setting of 10Hz (+/-5Hz after receiver AFC), which at 666MHz with a frequency ratio
of 1.0, corresponds to a speed of 4.5m/sec or 16.2km/hr.
>>12 of 27
Figure 2 - Tolerance to a single echo with Doppler
Table 15 – C/N Variation Requirements for Time Varying Channel (PFP1)
Mode Frequency Separation
f1 Hz
Δ C/N dB (with
respect to C/N at 1Hz frequency
separation)
5 – 32KN 256Q 3/5 1/32 PP4 8MHz 10 3 dB
6 – 32KN 256Q 3/5 1/8 PP2 7MHz 10 3 dB
7 – 32KE 256Q 2/3 1/128 PP7 8MHz 10 3 dB
8 – 32KE 256Q 2/3 1/16 PP4 8MHz 10 3 dB
9 – 32KE 256Q 3/4 1/32 PP6 8MHz 10 5 dB
12- TOLERANCE TO IMPULSE INTERFERENCE
12- 1- General
Impulse interference is different from other forms of interference, in that it is generated in
short bursts. Sources include car ignition systems and domestic appliances such as switches
and electric motors. In portable and mobile environment, the impulse interference will reach
the receiver directly through the antenna. The damage is potentially serious because a single
impulse burst can destroy several symbols of data. Research work on the impulse
interference has been mainly carried out in the UK digital television group (DTG) (ref 2).
Some of the specifications presented here are derived from that work.
12- 2- Test patterns
Various test signals comprising gated bursts of Gaussian noise are defined based on the
model shown in Figure 3. These have been chosen to match different categories of
measured impulse noise in the domestic environment such as dishwashers, lights, and
central heating thermostats. The DVB-T2 time interleaver improves impulse noise immunity
significantly over DVB-T by breaking up the noise impulses over time. This requires longer
noise burst durations, burst repetition periods and picture observation times (PFP2) to be
used compared with DVB-T as shown in Table 16.
C/Nmin + dB
C/Nmin
C/Nmin (dB)
Frequency
Separation (Hz) 1 f1
C/N (dB)
>>13 of 27
Figure 3 – Definition of the impulse interference test pattern
Table 16 – DVB-T2 Impulse interference test patterns
Test No
Pulses per burst
Minimum/maximum pulse spacing
μs
Burst duration
μs
Minimum/maximum burst duration
μs
Burst repetition
period ms
7 4 15 35 1 45.25 105.25 1000
8 40 0.5 1 10 19.75 39.25 1000
9 80 0.5 3 20 39.75 237.25 1000
10 400 1 30 100 399.25 11,970.25 1000
11 4,000 0.5 3 1,000 1,999.75 11,997.25 1000
12 40,000 0.5 1 10,000 19,999.75 39,999.25 1000
Table 17 - Minimum I/C values for DVB-T2 impulsive noise tests
Mode Expected I/C (dB) for picture failure (PFP2)
Test Pattern Number
7 8 9 10 11 12
5 – 32KN 256Q 3/5 1/32 PP4 8MHz 28.7 18.7 15.7 5.7 -4.8 -16.8
6 – 32KN 256Q 3/5 1/8 PP2 7MHz 29.1 19.1 16.1 6.1 -4.4 -16.4
7 – 32KE 256Q 2/3 1/128 PP7 8MHz 27.7 17.7 14.7 4.7 -5.8 -17.8
8 – 32KE 256Q 2/3 1/16 PP4 8MHz 27.2 17.2 14.2 4.2 -6.3 -18.3
9 – 32KE 256Q 3/4 1/32 PP6 8MHz 25.7 15.7 12.7 2.7 -7.8 -19.8
12- 3- Test requirement and procedure
The minimum I/C for picture failure point PFP2 should be obtained when the channel
contains gated Gaussian noise as defined in Table 16, for the modes shown in Table 17.
Burst 1 Burst 2
Burst repetition period
1000ms DVB-T2
Burst Du ration
Pulse Duration 250ns (fixed)
The number of pulses per burst is defined, but the spacing between pulses is
allowed to vary randomly between specified maximum and minimum values.
>>14 of 27
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
FEF 40ms
FEF 20ms
FEF 10ms
FEF 5ms FEF 60ms FEF has power equal to T2 frame
FEF 100ms FEF has power equal to T2 frame
Overall
FFTSIZE 4K 32K 32K 32K 32K 32K 32K
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
>>15 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
>>16 of 27
14- MISO OPERATION
MISO transmissions of group 1 and group 2 can either be transmitted from a single
transmitter location (co-located MISO), or from two or more transmitter locations (distributed
MISO). In the latter case there is a possibility that only one MISO group can be received due
to obstructions in the channel. Tests for basic MISO functionality under these different
conditions are shown in Table 21.
Table 20 – DVB-T2 MISO Test Setup
Test Parameters Value
DVB-T2 mode Mode 5 with 195 FEC blocks per interleaving frame
DVB-T2 signal level at tuner input -50dBm
Background AWGN applied -30dBc
Table 21 – DVB-T2 MISO Test Definitions
Test Number Test Details Expected Result
1 Gaussian channel - MISO group 1 only PFP1
2 Gaussian channel - MISO group 2 only PFP1
3 MISO group 1 (with 10 µsec delay) + MISO group 2 (no delay) PFP1
4 MISO group 1 (with 85 µsec delay) + MISO group 2 (no delay) PFP1
5 MISO group 1 (with 10 µsec delay + MISO group 1 (no delay) PFP1
6 MISO group 1 (with 85 µsec delay + MISO group 1 (no delay) PFP1
15- MPLP / RECEIVER BUFFER MODEL OPERATION
Functional tests to verify correct operation of the DVB-T2 receiver buffer model with multiple
PLPs are shown in Table 22. The receiver should be able to detect the services during a
channel scan, select the PLP number shown in Table 22 and display the video correctly. All
the streams use 8MHz RF bandwidth. A description of how to generate the multiple PLP test
signals is given in the Annex. Any transport stream with a bit rate of 3.3Mbit/s or lower can
be used.
Table 22 – DVB-T2 MPLP / RBM Operation
Test Selected PLP for reception Test Signal Name
VV702 0 VV702_plp0
1 VV702_plp1
VV705 0 VV705_plp0
VV708 0 VV708_plp0
2 VV708_plp2
VV710 0 VV710_plp0
3 VV710_plp3
>>17 of 27
REFERENCES AND ACKNOWLEDGEMENTS 1. DVB-T2 A133 Blue Book – Implementation guidelines for a second generation digital
terrestrial television broadcasting system (DVB-T2) 2. DTG D-Book 7 Part A, Digital Television Group, UK
3. E-Book RF specification draft v2.16, DIGITALEUROPE
>>18 of 27
ANNEX - GUIDELINES ON THE GENERATION OF REAL VIDEO MULTIPLE PLP TEST SIGNALS
Summary
The test signals are a subset of tests developed in the DVB-T2 V&V group to check corner
cases of receiver buffer model operation and proper recognition of multiple PLP services in
the received DVB-T2 RF signal by monitoring the displayed picture and sound of the TV
product. It is expected that test equipment manufacturers will provide suitable test signals
following the guidelines in this annex to enable receiver testing. A low bit rate transport
stream <=3.3Mbit/s is required with sufficient movement to prevent error concealment
algorithms in the video decoder from concealing receiver problems.
The demodulator in the receiver combines the selected PLP and common PLP data to create
a valid transport stream. By including the real video data in the common PLP it is possible to
detect problems with the re-combining process by monitoring the received picture and audio.
Figure 4 shows the operations to create the signal in the modulator. Figure 5 shows the
operations to re-combine the selected data PLP with the common PLP in the receiver. Note
that a separate test signal is required to test each PLP because only one PLP is encoded
with the real video sequence, the rest contain PRBS sequences.
Figure 4 -Creation of real video MPLP test signals in the modulator
TS0TS0TS0 TS0 TS0 TS0 Null Null Null TS0 TS0 TS0 TS0
Null Null Null Null Null Null Null Null Null NullTS1 TS1 TS1
TS0
TS1
PLP0
PLP1
PLPC
TS0TS0 TS0 TS0
TS0
Null Null Null TS0
TS0
TS0 TS0
Null TS0
Null
Null Null Null Null Null Null Null Null Null NullTS1 TS1 TS1
Null Null
Null
Null Null NullNull Null
Null
Null Null
TS0 TS0 TS0 TS0Null Null Null Null
TS1 TS1 TS1 TS1Null Null Null Null
TS0 TS0 TS0Null Null Null Null
TS0
Null
Null
TS0
Null TS0 TS0Null Null Null Null
TS1 TS1 TS1 TS1Null Null Null Null
Null
Null
Null
TS0 NullPRBS packet Null packet TS0 Real Video packet
(may contain SI info)
Common PLP packets should not contain PAT,
SDT, NIT, EIT, PMT but only audio/video packets
TS0 Real Video packet
(no SI information)
>>19 of 27
TS0Null
PacketTS0TS0
Null
Packet
Comm
Cat 2
PLP 1
TS0Null
Packet
Null
Packet
Null
Packet
Null
Packet
Null
PacketTS0 TS0
Null
PacketTS0
Null
PacketTS0 TS0
Null
Packet
Null
Packet
Null
Packet
Null
Packet
Null
Packet
Null
PacketTS1 TS1
Comm
Cat 2
PLP 1
Null
Packet
Null
Packet
Null
PacketTS1 TS1
Null
Packet
Null
Packet
Null
Packet
Null
Packet
Null
Packet
Null
Packet
Null
Packet
Comm
Cat 1
Null
Packet
Null
Packet
Null
Packet
Comm
Cat 2
PLP 1
Null
Packet
Comm
Cat 2
PLP 2
Null
Packet
Null
Packet
Comm
Cat 3
PLP 1
Null
Packet
Null
Packet
Null
Packet
Comm
Cat 3
PLP 2
Null
Packet
Comm
Cat 3
PLP 2
Null
Packet
Null
Packet
PLP0
PLP1
Common
PLP
TS0
Null
Packet
Null
Packet
TS1
Null
Packet
Null
Packet
Null
Packet
TS0
Null
Packet
Null
Packet
TS0
Null
Packet
TS1
Null
Packet
Null
Packet
TS1
Null
Packet
TS0Comm
Cat 1TS0TS0
Null
Packet
Comm
Cat 2
PLP 1
TS0
Comm
Cat 2
PLP 2
Null
Packet
Null
Packet
Comm
Cat 3
PLP 1
Null
PacketTS0 TS0
Comm
Cat 3
PLP 2
TS0
Comm
Cat 3
PLP 2
TS0 TS0
Null
Packet
Comm
Cat 1
Null
Packet
Null
Packet
Comm
Cat 2
PLP 1
TS1 TS1
Comm
Cat 2
PLP 2
Null
Packet
Null
Packet
Comm
Cat 3
PLP 1
TS1 TS1
Comm
Cat 3
PLP 2
Null
Packet
Null
Packet
Comm
Cat 3
PLP 2
Null
Packet
Null
Packet
TS0
TS1
TS0
Null
Packet
Null
Packet
TS1Null
Packet
TS0
Null
Packet
TS0
TS1
Null
Packet
TS1
Null
Packet
Time
M packets (M=4)
First chapter: 2 repetitions of repeating unit with NumPackets[0]=4, NumPackets[1]=3
New repeating unit with
NumPackets[0]=2,
NumPackets[1]=1
TS0 Normal packet
for TS0/PLP0TS1 Normal packet
for TS1/PLP1
Comm
Cat x
PLP i
Common packet,
category x
describing PLP i
Normal
slot for PLP 1
Common
slot
4
3 3
4 2 2
1
Figure 5– Recombination of selected data PLP (PLP0 in this example) and the common PLP in the receiver to re-create TS0
Test signal composition
Figure 6 shows how the packets for TS0 are allocated to the selected PLP (PLP0) in units (in
red boxes) of different numbers of packets (run lengths), and to common PLP slots that
occur at regular spacing (M=4 in this example). In addition TS1 (PRBS) is assigned to PLP1.
A chapter is formed by repeating units a specific number of times. A new chapter containing
new run lengths for TS0 and TS1 and a new number of unit repetitions is shown starting to
the right of the red line.
Figure 6 - Test signal composition
TS0TS0TS0 TS0 TS0 TS0 Null Null Null TS0 TS0 TS0 TS0
Null Null Null Null Null Null NullTS1 TS1 TS1
TS0
TS1
PLP0
PLP1
PLPC
TS0TS0 TS0 TS0
TS0
Null Null Null TS0
TS0
TS0 TS0
Null TS0
Null
Null Null Null Null Null Null Null Null Null NullTS1 TS1 TS1
Null Null
Null
Null Null NullNull Null
Null
Null Null
TS0 TS0 TS0 TS0Null Null Null Null
TS1 TS1 TS1 TS1Null Null
TS0 TS0Null Null Null Null
TS0
Null
Null
TS0
Null TS0 TS0Null Null Null Null
TS1 TS1 TS1 TS1Null Null Null Null
Null
Null
Null
TS0 TS0 TS0
Null
TS0 TS0
>>20 of 27
Table 23 - Test signal generation parameters
Number 702 705 708 710
Mnemonic TDICC3 SPLPTDICC2 DJBCC2 TDICC1
VV Reference VV702-TDICC3 VV705-SPLPTDICC2 VV708-DJBCC2 VV710-TDICC1
Time Deinterleaver
Buffer Corner Case
3 below limit (OK)
Single PLP corner
case (OK - below
limit) FEF
De-jitter Buffer
corner case (OK -
below limit)
Time Deinterleaver
Buffer Corner Case
(OK) Based on
VV400 + FEF, with
critical i/p
Input stream definition
Input stream generation model
Dynamic multiple
PLP
SPLP (Fixed bit-
rate)
Dynamic multiple
PLP
Dynamic multiple
PLP
Input TS rate Mbit/s 36.234886 38.030308 5955840/178801
Input one big TS file
M Common slot interval
22 11 11
L Number of chapters
4 8 10
N_EIT Number of successive EIT
packets
50 100 100
NumReps Repeats of repeating unit
15, 1, 15, 1 15,1,15,1,15,1,15,1 15,1,15,1,15,1,15,1
,15,1
RunLength(TS0) Run length for each TS..
92, 20, 44, 27 102,95,102,95,102,
95,102,95
102,95,102,95,0,0,
66,3,102,95
RunLength(TS1) in each repeating unit..
44, 27, 92, 20 15,29,15,29,15,29,
15,29
13,11,13,11,19,13,
8,17,13,11
RunLength(TS2) ..in a chapter 8, 2, 8, 2 14,15,14,15,14,15,
14,15
13,15,13,15,19,13,
8,15,13,15
RunLength(TS3) 8, 2, 8, 2 14,16,14,16,14,16,
14,16
13,14,13,14,18,11,
7,3,13,14
Overall
Length V&V minimum of one T2 frame
4 frames 7 frames 3 frames 5 frames
PLP Multiple Single Multiple Multiple
FFTSIZE 32K 32K 32K 32K
GI 1/128 1/16 1/128 1/128
Data Symbols Including frame closing symbol (if
present)
27 61 27 27
SISO/MISO SISO SISO SISO SISO
PAPR P2-TR & L1-ACE TR & L1-ACE P2-TR & L1-ACE P2-TR & L1-ACE
>>21 of 27
only only only
Frames per superframe
2 6 2 4
Bandwidth 8MHz 8MHz 8MHz 8MHz
Elementary period T 0.109375 0.109375 0.109375 0.109375
Extended Carrier Mode
Yes Yes Yes Yes
Pilot Pattern PP7 PP4 PP7 PP7
L1 Modulation 16QAM 64QAM 16QAM 16QAM
Sub Slices per Frame Not required in Single PLP
108 1 108 108
FEF None Yes None Yes
FEF Type 0000 0000
FEF Length in samples 595420 380000
FEF Interval 6 4
FEF P1: S1 Value 010 010
FEF P1: S2 Value 0001 0001
FEF contents PRBS PRBS
L1 Repetition Repetition of the dynamic signalling
0 0 0 0
Number of PLPs 5 1 5 5
Number of RFs 1 1 1 1
Number of AUXs 0 0 0 0
AUX_CONFIG_RFU
AUX_STREAM_TYPE
AUX_PRIVATE_CONF
AUX_PRIVATE_DYN
Spec version 1.2.1 1.2.1 1.2.1 1.2.1
Vclip infinity 3.55 infinity infinity
L1 Extension Present? No No No No
L1 Extension Block Type
L1 Extension Data Length
L1 Bias balancing cells present?
No No No No
Number of Active L1 Bias balancing cells
(per P2)
L1_ACE_MAX 0 0.1 0 0
Pseudo Fixed Frame Structure
Use Max Cells Per T2 Frame for
scheduling
Yes No No Yes
>>22 of 27
PLP 1
PLP_ID 0 0 0 0
PLP_GROUP_ID 0 1 0 0
Type 1 1 2 2
Modulation 256QAM 256QAM 256QAM 256QAM
Rate 2/3 3/5 2/3 2/3
FEC Type 64800 64800 64800 64800
Rotated QAM Yes Yes Yes Yes
FEC blocks per interleaving frame
Comma-separated list gives the
number of blocks in each
Interleaving Frame
dynamic 200 dynamic dynamic
Max FEC blocks per interleaving frame
Value for configurable
signalling. May exceed the max
value used
57 200 57 57
TI blocks per frame (N_TI)
derived parameter 1 3 1 1
T2 frames per Interleaving Frame
(P_I)
derived parameter 1 1 1 1
Frame Interval (I_JUMP)
1 1 1 1
First frame index 0 0 0 0
Input stage
Mode HEM HEM HEM HEM
ISSY Yes Yes Yes Yes
BUFS 1613824 2097152 1671168 1662976
Design delay (samples) 939080 719388 935798 939195
Null packet deletion Not required in Single PLP (I.G.
7.7.3.1)
Yes No Yes Yes
In Band Signalling Type A No Type A Type A
Number of other PLPs in-band signalling
0 0 0
Number of NULL packets inserted each
time (p)
Frequency of NULL packets insertion in
packets (q)
PLP 2
PLP_ID 1 1 1
PLP_GROUP_ID 0 0 0
Type 1 2 2
>>23 of 27
Modulation 256QAM 256QAM 256QAM
Rate 2/3 2/3 2/3
FEC Type 64800 64800 64800
Rotated QAM Yes Yes Yes
FEC blocks per interleaving frame
dynamic dynamic dynamic
Max FEC blocks per interleaving frame
57 57 57
TI blocks per frame (N_TI)
1 1 1
T2 frames per Interleaving Frame
(P_I)
1 1 1
Frame Interval (I_JUMP)
1 1 1
First frame index 0 0 0
Input stage
Mode HEM HEM HEM
ISSY Yes Yes Yes
BUFS 1613824 1671168 1662976
Design delay (samples) 939080 935798 939195
Null packet deletion Yes Yes Yes
In Band Signalling Type A Type A Type A
Number of other PLPs in-band signalling
0 0 0
Number of NULL packets inserted each
time (p)
Frequency of NULL packets insertion in
packets (q)
PLP 3
PLP_ID 2 2 2
PLP_GROUP_ID 0 0 0
Type 1 2 2
Modulation 256QAM 256QAM 256QAM
Rate 2/3 2/3 2/3
FEC Type 64800 64800 64800
Rotated QAM Yes Yes Yes
FEC blocks per interleaving frame
dynamic dynamic dynamic
Max FEC blocks per interleaving frame
22 57 57
TI blocks per frame (N_TI)
1 1 1
>>24 of 27
T2 frames per Interleaving Frame
(P_I)
1 1 1
Frame Interval (I_JUMP)
1 1 1
First frame index 0 0 0
Input stage
Mode HEM HEM HEM
ISSY Yes Yes Yes
BUFS 1613824 1671168 1662976
Design delay (samples) 939080 935798 939195
Null packet deletion Yes Yes Yes
In Band Signalling Type A Type A Type A
Number of other PLPs in-band signalling
0 0 0
Number of NULL packets inserted each
time (p)
Frequency of NULL packets insertion in
packets (q)
PLP 4
PLP_ID 3 3 3
PLP_GROUP_ID 0 0 0
Type 1 2 2
Modulation 256QAM 256QAM 256QAM
Rate 2/3 2/3 2/3
FEC Type 64800 64800 64800
Rotated QAM Yes Yes Yes
FEC blocks per interleaving frame
dynamic dynamic dynamic
Max FEC blocks per interleaving frame
22 57 57
TI blocks per frame (N_TI)
1 1 1
T2 frames per Interleaving Frame
(P_I)
1 1 1
Frame Interval (I_JUMP)
1 1 1
First frame index 0 0 0
Input stage
Mode HEM HEM HEM
ISSY Yes Yes Yes
BUFS 1613824 1671168 1662976
>>25 of 27
Design delay (samples) 939080 935798 939195
Null packet deletion Yes Yes Yes
In Band Signalling Type A Type A Type A
Number of other PLPs in-band signalling
0 0 0
Number of NULL packets inserted each
time (p)
Frequency of NULL packets insertion in
packets (q)
PLP 5
PLP_ID 4 4 4
PLP_GROUP_ID 0 0 0
Type 0 0 0
Modulation 64QAM 64QAM 64QAM
Rate 2/3 2/3 2/3
FEC Type 16200 16200 16200
Rotated QAM Yes Yes Yes
FEC blocks per interleaving frame
17 35 33
Max FEC blocks per interleaving frame
17 35 33
TI blocks per frame (N_TI)
1 1 1
T2 frames per Interleaving Frame
(P_I)
1 1 1
Frame Interval (I_JUMP)
1 1 1
First frame index 0 0 0
Input stage
Mode HEM HEM HEM
ISSY Yes Yes Yes
BUFS 483328 425984 434176
Design delay (samples) 939080 935798 939195
Null packet deletion Yes Yes Yes
In Band Signalling Type A Type A Type A
Number of other PLPs in-band signalling
0 0 0
Number of NULL packets inserted each
time (p)
>>26 of 27
Frequency of NULL packets insertion in
packets (q)
Max Cells Per T2 Frame
Common PLPs 45900 89100
Type 1 PLPs 688500 0
Type 2 PLPs 0 656100
Dynamic Block Numbers
PLP_GROUP_0
Total FEC blocks common PLP
17 35 33
Total FEC blocks type 1 85 0 0
Total FEC blocks type 2 0 82 81
Max FEC blocks per PLP type 1
57 0 0
Max FEC blocks per PLP type 2
0 57 57
PLP_GROUP_1
Total FEC blocks common PLP
Total FEC blocks type 1
Total FEC blocks type 2
Max FEC blocks per PLP type 1
Max FEC blocks per PLP type 2
>>27 of 27
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