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DVB-T and DVB-T2 Receiver
Test Challenges
Application Note
Introduction
Over the past 10 years, DVB-T has become the most widely adopted and
deployed terrestrial digital video standard. It is now well established and the
prices of DVB receivers have dropped over time as the technology has matured.
Due to its successful development and deployment, DVB-T has come to serve
as a sort of benchmark for the development of other terrestrial digital video
standards.
Due to increasing scarcity of spectrum and requirements for high transmission
capacity in recent years, an updated standard with more spectral efficiency is
required to replace DVB-T. The DVB-T2 system is capable of meeting these
requirements, due to its increased capacity, robustness, and the ability to reuse
existing reception antennas. The regions which previously adopted DVB-T sys-
tems, primarily countries in Europe and Asia, will be migrating to DVB-T2, while
many new countries and regions began the process of adopting DVB-T2 directly
since the first version of the standard was published in 2009.
With the advanced technologies used in DVB-T2 to achieve high performance,
new measurement challenges are facing both transmitter and receiver develop-
ers. In this application note, we will focus on the measurement challenges for
developers of receivers such as set-top-boxes.
Overview of DVB-T and DVB-T2 Systems
Both DVB-T and DVB-T2 use the OFDM modulation DVB-T2 is an ideal choice for the replacement of the DVB-T
scheme, which provides various options for bandwidth, system because a number of the elements of the DVB-T2
modulation, FEC (forward error correction) rates, number of system align with the system requirements put forth by
carriers, and guard intervals, making it flexible enough to the standards bodies. The key requirements and the cor-
meet the needs of different transmission environments and responding DVB-T2 technology components are listed in
operators. Table 1.
Table 1. Key requirements of DVB-T replacement system and corresponding DVB-T2 system components
Key requirements of the DVB-T replacement system Key DVB-T2 technology components
Provide a minimum of a 30% capacity increase over DVB-T