Elettronika TXUP10000LD, Общее описание устройства

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DESCRIPTION
The TXUP10000LD belongs to the High Power UHF products family of Television Transmitters fully in solid
state technology.
The TXUP10000LD series represents the 10kW TV Transmitters operating in the IV/V Band for Common
amplification process (separate amplification available) of the Vision and Sound carriers. This Transmitters
family has been designed to offer to the customer high performances, high reliability and greater simplicity in
their operation and maintenance procedures.
The Vision and Sound signal processing is provided for all TV Standards and all types of Audio applications
(Mono & Dual sound - NICAM) together with colour systems such as PAL - NTSC - SECAM. Thanks to
the amplitude and phase pre-correction circuit, it is possible to cancel the distortions in the output stage, thus
cutting down the operating costs. The RF transposition in the driver is carried out by a synthesizer with various
possibilities of accuracy and stability as well as precision offset locked by internal or external frequency
reference.
The RF amplifier is made up by eight RF modules installed in a power rack, the modules are dedicated for the
Vision and Sound carriers common amplification. The amplifiers employ solid state LDMOS technology in
order to obtain wide band, reliability, and high efficiency. Each RF module has a built-in switching-mode
power supply unit, self-protected against overcurrents and overvoltages, as well as overtemperature and
VSWR for RF parameters. The cooling system is fully contained into the transmitter. The control unit provides
full management of the transmitter without the presence of the operator, the system includes a central controller
and several peripheral units installed in each RF module and rack. The control device includes a fault finding
system to detect equipment malfunctions and locate the faulty subassembly which needs to be replaced. The
interlock circuit is independent on the software and remains always operational whether computer control is
present or not. The operator interface is made by a high resolution LCD graphic display and a simple keyboard,
the menu is very friendly and easy to use.
The Control Unit can be fully controlled in REMOTE mode via link or via modem in RS232 or other interface.
The equipment design allows the soft degradation (RF power loss) for several transistors faults.
- TECHNICAL SPECIFICATIONS
RF SECTION
Frequenchy range ............................................................................................................................................ 470 - 860MHz
Output power ........................................................................................................................................................ 10kW PEP
Audio / Video power ratio ....................................................................................... 10/1 single sound - 20/1/0.2 dual sound
Out stage technology ............................................................................................................................. Solid State LDMOS
Audio / Video amplification ...................................................................................................................................... Common
Standards ................................................................................................................................................................ G, K, I, M
Audio transmission ...................................................................... FM single sound - Dual sound coding IRT - NICAM 728
Harmonics and suppression emission ..................................................................................... In compliance with CCIR rec.
Intermodulation products from audio and video ..................................................................................................... < = 56dB
Frequency stability ......................................................................................................................... 2,5ppm (option 0,05ppm)