SVP UDT-02, Руководство пользователя, Страница: 18 / 165

UDT-02 UHD HEVC Digital Camera Transmitter
MANUAL V1.0
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General Features
This transmitter features HEVC, H.264 and Mpeg-2 encoding for 12G, high
definition (HD) and standard definition (SD) signals with ultra-low latency.
HEVC allows the same video quality, reducing file sizes by up to 50%
compared to its predecessor, the H.264.
Among the improvements of this new transmitter is the ability to transmit
one 4K UHD signal with HDR at 10-bit 4:2:2 quality or 4 simultaneous
1080p50/59HD signals.
It optionally includes integrated Bidirectional camera control, Tally and
Intercom.
Encoded signals can be encrypted using BISS-1 or BISS-E scrambling system,
and optionally AES 128 and 256. The encrypted signal will only be received
by the receivers that have a valid descrambling key.
It has a display and a keyboard which makes the configuration and monitoring
of every parameter of the equipment possible.
The equipment is fed with DC power supply from 10 to 36V. It can be powered
through DC power supply connector or through the battery mount (optional).
Its excellent design, mechanical and electronic assembly make the UDT-02 a
robust and reliable solution.
DVB-T2 features
It is available from 1 GHz to 8 GHz through three different output bands,
being 100 mW the maximum output power. High quality components have
been used to achieve the best output signal quality.
The UDT-02 digital camera transmitter uses COFDM (Coded Orthogonal
Frequency Division Multiplexing) modulation system (1K, 2K, 4K) which
provides superior signal robustness and a higher link performance. This
technology provides operators with efficient means to overcome the
challenges of NLOS propagation and mobile channels propagation.
COFDM spread spectrum modulation system distributes the data over a large
number of closely-spaced carriers, for example, 1705 carriers in 2K mode.
The data is divided into several parallel data streams, one for each carrier,
so, each carrier transports a lower data rate and the symbol duration is
longer. Each carrier is then modulated with a QPSK, 16QAM, 64QAM or
256QAM scheme. Moreover, the rotated constellation technique is applied in
order to improve the link performance.
A COFDM modulated signal, as it uses a low symbol rate modulation scheme
(i.e. where the symbols are relatively long compared to the channel time
characteristics), suffers less from intersymbol interference (ISI) caused by
multipath propagation. As the duration of each symbol is long, it is feasible
to insert a guard interval between the COFDM symbols, thus eliminating the
intersymbol and co-channel interference. So, if one carrier’s information is
lost, only a small part of the whole information would be lost.
Besides, in COFDM, the sub-carrier frequencies are chosen so that the sub-
carriers are orthogonal to each other, meaning that cross-talk, interference,