Pure DRX-701ES - Manual (Page 11)

9
Guide to digital radio
This section provides a brief guide to digital radio (DAB), explains how the features of your DRX-701ES provide access to it, and provides some
useful addresses for finding out more.
Your DRX-701ES enables you to receive and listen to DAB radio programmes. Digital Audio Broadcast (DAB) uses digital signals rather than
traditional analogue signals enabling near CD-quality audio with virtually interference-free reception. DAB also enables broadcasters to transmit
additional data along with the audio including other audio channels, text and in the future, perhaps computer data and images.
Digital radio is broadcast as groups of data called ensembles or multiplexes. Each multiplex can contain a number of stations (services) and
each station contains a primary service and can contain secondary services as illustrated in the following diagram.
Each multiplex is transmitted in a set frequency range and received by your DRX-701ES for decoding. Your DRX-701ES enables you to receive
multiplexes broadcast in frequency band III (174-240 MHz) and store the services in each multiplex for you to access. The number of
multiplexes you receive will vary depending on your location. Band III is divided into 41 channels identified as 5A to 13F. Each channel can
contain one multiplex. Channels allocated to the UK are in the range 11B to 12D.
Multiplexes and stations have labels (names) which are used to identify them. Instead of needing to know a particular frequency to listen to
your favourite broadcast you can simply select the station name. Secondary services and additional data such as text containing programme or
multiplex information are also easily accessed using your DRX-701ES.
Useful addresses
The following addresses provide additional useful information about digital radio including coverage, available stations and usage tips:
DAB Signal
Multiplex
National DAB
e.g. BBC National DAB
Primary DAB Services
Main higher bandwidth services such as music or speech
e.g. BBC Radio 4
Secondary DAB Services
Lower bandwidth services such as news, text information or speech
e.g. Parliament
BBC Digital Radio tel: 08700 100 123
Room 5661 e-mail: [email protected]
Broadcasting House web: www.bbc.co.uk/digitalradio
Portland Place
London, W1A 1AA
Digital Radio Development Bureau tel: 020 7306 2630
The Radio centre e-mail: [email protected]
77 Shaftesbury Avenue web: www.drdb.org
LONDON, W1D 5DU
Digital One tel: 020 7288 4600
20 Southampton Street e-mail: [email protected]
LONDON, WC2E 7QH web: www.ukdigitalradio.com