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DAB Multiblock Transmitters
Itelco international patent 99830765.6-2216

Itelco proudly presents its line of advanced solid state DAB Multiblock transmitters. The state-of-the-art of these transmitters is guaranteed by Itelco�s vast experience in RF systems, know-how in implementation of sophisticated technologies, and expertise in digital signal processing, which ensures a competitive edge to our customers. 

Itelco offers a Multi-Block Transmitter Configuration which allows integrating up to 4 DAB Exciters in a single transmitter. This enables any Itelco DAB transmitter to broadcast up to 24 digital radio programs, in 4 channel with 1 transmitter. Consequently you need fewer transmitters and, since the signal combined is at IF level, only one RF combiner, thus minimizing filter losses. Moreover you can achieve significant space saving within the transmitter station, and you can reduce the number of necessary spare parts. Itelco�s solid state DAB transmitters generate a COFDM RF signal of highest quality due to superior COFDM modulation, digital precorrection and linear RF amplification. The development of both the digital processing and RF stages by Itelco guarantees an exemplary integration of digital and analog technologies not available from manufacturers who utilize outside vendors for major system components.
Itelco�s innovative digital precorrector ensures minimal adjacent channel emissions, optimal signal linearity of the transmitter RF output and maximized amplifier efficiency. The Automatic Gain Control circuits in the PAs and the Automatic Level Control circuit in the exciter guarantee output power stability. 

  

Main Features

  • Itelco international patent 99830765.6-2216
  • Up to 4 DAB channels transmitted with a single transmitter
  • No High Power RF Combiner needed
  • 8 MHz digital controlled precorrector to compensate HPA distortions
  • Solid State Technology
  • Air/Liquid Cooling

DAB MULTIBLOCK
Functional Block Diagram


OUTPUT SPECTRUM

INTERBLOCK IMD.


ADVANTAGES

  • No output combiner filter loss (@ 0,8 dB �)
  • High efficiency
  • Space saving within the transmitter station thanks to the very compact construction: four 1,5kW DAB blocks in 1,32m�
  • Money saving �(Finland, Sweden).
Key Features/Benefits

- Clear, modular design
- High-performance DAB Exciter with integrated COFDM Modulator
- Fully compliant with ETSI ETS 300 401 edition 2, supporting all operation modes
- DAB band III and L-band transmitter models
- Easy reprogrammable devices
- Effective self diagnostic capability (on-line and off-line)
- Digital precorrector minimizes adjacent channel emissions and provides optimal signal linearity
- Standard remote control and monitoring interface
- Exemplary integration of digital and analogue technologies
- Broadband RF power amplifier modules with Tetrafet for VHF band or with LDMOS devices in L-band.
- Input for external frequency synchronisation (GPS) or internal GPS receiver (plug-in option)
- Designed for straightforward operation and maintenance
- Multi-Block configuration for broadcasting of up to 24 digital radio programs on 4 channels   with 1 Tx
- N+1 reserve system optionally available
- Exciter in passive standby (optional)
- Compact dimensions
- Designed and manufactured under ISO 9001 certified Quality Management System