DIGITAL RADIO GUIDETERRESTRIAL TRANSMISSION SYSTEMS - DAB

Table 4.1. Eureka 147 Main System Features

EUREKA 147

Main System Features

Single Frequency Network (SFN)

All transmitters working on a single

capability

frequency.

 

 

Flexible audio bit rate

Allows reconfiguration of the multiplex.

 

 

Data services

Separately defined streams or packets.

Programme Associated Data (PAD)

Embedded in the audio bit stream and

 

adjustable.

Facilitates Conditional Access

DAB ensemble transports conditional

 

access information (CAI) and provides

 

signal scrambling mechanism.

 

 

Service Information

Used in the operation and control of

 

receivers.

 

 

Operating frequency range

30 MHz to 3 GHz.

4.2.4Infrastructure Requirements

Eureka 147 is a wideband technology requiring services to be multiplexed before transmission. The use of VHF and UHF bands means Eureka 147 services will be typically transmitted from high sites such as the tops of hills, buildings or towers.

In general, new Eureka 147 services are also likely to be co-located with existing FM radio or television transmission services given the cost of developing new sites and the increasing difficulty in getting local council planning approval for new transmission sites.

In Canada, implementation of the Eureka system uses a new band (L-Band), hence new transmitters, antenna system, exciter and encoders have been required. Stations that were originally broadcasting more than one FM program from the same site can fully encapsulate the multiplexed stream of the DAB system in the STL (studio-to-transmitter link), significantly reducing the costs associated with discrete feeder links. Canada’s DAB allotment plan has room for the replacement of all existing AM and FM stations in the L-Band. The plan also includes many empty allotments for future services. Finally, since the plan was based on providing only five programming channels in each DAB multiplex, new audio coding schemes will allow for the possible implementation of two to three additional services in each ensemble.

4.2.5Synergies with Other Systems

(1)DAB and GSM (Global System for Mobile Communications)

DAB is an efficient broadcasting (e.g., one-to-many) system capable of providing reliably digital services to all users located in a coverage zone in real time. It is especially suitable for the reception to mobile and portable receivers and in the areas in which the direct line of sight between the transmitter and the receiver is not possible.

On the other hand, GSM (Global System for Mobile Communications) and its successors (GPRS and UMTS) are more suitable to deliver on-demand media

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Grundig Digital Radio manual Infrastructure Requirements, Synergies with Other Systems, Eureka 147 Main System Features
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Digital Radio specifications

The Grundig Digital Radio represents a significant advancement in radio technology, combining aesthetics, functionality, and a user-friendly interface. As a pioneer in the audio and electronics industry, Grundig has successfully integrated modern digital capabilities into its traditional radio design, appealing to both nostalgic listeners and tech-savvy users.

One of the standout features of the Grundig Digital Radio is its versatility in reception. With DAB+ (Digital Audio Broadcasting) technology, users can enjoy a wide array of radio stations with superior sound quality, free from the hiss and interference commonly associated with analog broadcasts. The inclusion of FM and AM bands ensures that listeners are not limited, providing access to local stations that may not yet have transitioned to digital.

The Grundig Digital Radio is designed with ease of use in mind. Its intuitive interface, often featuring a clear LCD display, allows users to navigate through stations and settings effortlessly. Many models also include a built-in tuner that automatically scans and presets available stations, simplifying the setup process. For those who appreciate personalization, some variants come equipped with customizable presets, allowing users to save their favorite stations for quick access.

Portability is another key characteristic of the Grundig Digital Radio. Many models are lightweight and come with built-in handles, making them ideal for on-the-go listening, whether it's in the garden, on the beach, or during a picnic. Battery options, alongside mains power, ensure that users can take advantage of their radios wherever they choose.

In terms of sound quality, Grundig utilizes advanced audio technologies to deliver rich and clear sound. Enhanced bass responses and treble controls allow users to fine-tune their listening experience to match their preferences. Furthermore, many models feature additional inputs, such as AUX and USB ports, enabling users to connect their smartphones or other devices, expanding their audio options.

Other notable characteristics include built-in alarms and timers, which make the Grundig Digital Radio a versatile companion for daily routines. Some models even support Bluetooth connectivity, allowing for seamless streaming from a variety of devices.

In summary, the Grundig Digital Radio embodies the perfect blend of traditional radio appeal and modern digital technology, offering versatility, ease of use, superior sound quality, and portability to meet the diverse needs of today’s listeners. Its well-thought-out features and user-friendly design make it an excellent choice for anyone looking to enhance their audio experience.
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