Standardized DVB-T2 RF specifications - DigitalEurope

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
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