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DAB Air Cooled Transmitters |
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Itelco proudly presents its line of
advanced solid state DAB transmitters. The air
cooled transmitters are available in output power
classes from 1W to 1kW for operating in VHF Band
III and from 0,5W to 1,2kW in L-band. Output power
more than 2 kW are typical of the multiblock
configuration. The system configuration ranges
from single transmitters, passive
exciter standby with automatic changeover to N+1
systems relying on Itelco�s reputed system
engineering capability, and Multi-Block
systems. |
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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. |
The
transmitters employ an optimized internal air
cooling system, designed for reliable operation up
to 45 �C, which, at that temperature ensures a
constant and equal cooling. The cooling system
incorporates an ultra-reliable main redundant
blower in passive reserve with automatic exchange
every ten days, and additional blowers for each
power amplifier. Maintenance
is simplified due to the straightforward system
control and the user-friendly modular design that
enables easy and quick access to all serviceable
components. A great amount of maintenance can be
carried out without interrupting transmitter
operation. Design considerations and low flow rate
of the air cooling system decrease the
accumulation of dust and dirt, thereby extending
the maintenance interval. An electric raceway
contains all cables that further simplifies the
maintenance. Itelco�s design ensures
multi-sourcing down to component
level. |
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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
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