Technical Overviews
DVB-T/H with T2 Measurement App
The Keysight Technologies, Inc. N/W6153A measurement application provides one-button, standards-based power and modulation analysis capabilities to help you with designing, evaluating, and manufacturing DVB-T/H/T2 modulators, transmitters, amplifiers, tuners, and gap-fillers/repeaters. Optional analog baseband IQ inputs in the PXA or MXA signal analyzer provide you the flexibility to measure signal quality and mod-ulation accuracy with RF input or analog IQ input.
The N/W6153A measurement application is just one in a common library of more than 25 measurement applications in the Keysight X-Series. The Keysight X-Series is an evolutionary approach to signal analysis that spans instrumentation, measurements, and software.
The X-Series analyzers, with upgradeable CPU, memory, disk drives, and I/O ports, enable you to keep your test assets current and extend instrument longevity. Proven algorithms, 100% code-compatibility, and a common UI across the X-Series create a consistent measurement framework for signal analysis that ensures repeatable results and measurement integrity so you can leverage your test system software through all phases of product development. In addition to fixed, perpetual licenses for our X-Series measurement applications, we also offer transportable licenses which can increase the value of your investment by allowing to you transport the application to multiple X-Series analyzers.
Digital video broadcasting-terrestrial/handheld (DVB-T/H) is the European-based consortium standard for broadcast transmission of digital terrestrial/handheld television.
DVB-T
DVB-T is a flexible system that allows networks to be designed for the delivery of compressed digital audio, video, and other data in an MPEG transport stream using OFDM modulation with concatenated channel coding (i.e. COFDM). It is the most widely adopted digital terrestrial television broadcasting standard in the world and is deployed in more than 30 countries.
In DVB-T, the use of OFDM modulation with appropriate guard interval allows optimal tradeoff between network topology and frequency efficiency. The capacity for hierarchical modulation can enable two completely separate data streams to transmit in a single signal which can be used to trade off bit rate versus ruggedness. DVB-T has the following technical characteristics that make it a very flexible system.
DVB-H
DVB-H is an extension of the DVB-T standard, which takes into account the handheld receiver’s specific properties such as the small size, light weight, portability, and battery operation.
DVB-H uses a time slicing technique which results in a large battery power saving effect, and introduces a multiprotocol encapsulation forward error correction (MPE-FEC) scheme for reliable transmission in poor signal reception conditions. A transmission mode of 4k is defined in DVB-H to offer a tradeoff between the transmission cell size and mobile reception capabilities.
The complexity of the DVB-T/H standards demands flexibility and excellent modulation analysis for system development and evaluation.
DVB-T2
The DVB-T2 standard, defined in ETSI EN 302 755, is an extension of the existing DVB-T standard, aiming to provide a minimum of 30% capacity increase over the DVB-T, improving single-frequency-network (SFN) performance, service specific robustness, better error correction ability, and bandwidth and frequency flexibility.
A new technology, called Rotated Constellation, is used and provides significant additional robustness in difficult channels. DVB-T2 defines two modes: Mode A (single PLP) and Mode B (multi-PLPs). A multi-PLPs mechanism is provided to separately adjust the robustness of each delivery service within a channel to meet the required reception conditions. Furthermore, a receiver can save power by decoding only a single service rather than the entire multiplex of service.
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