What Is Digital Radio - M Bass MOSDR011 User Manual

What is digital radio?

DAB (Digital Audio Broadcasting) is the next
generation of radio.
DAB was developed in Europe by a
consortium of broadcasters and
manufacturers.
DAB uses digital compression techniques
to transform the source material, i.e. music
and speech, into digital computer code
before it is transmitted. The computer code
consists of electronic "ones and zeros"
called binary digits or bits. The binary code
is then multiplexed or grouped together to
create a superior signal, when compared
with the older analogue system, with the
following key benefits:
•
Near CD quality sound.
Because DAB is binary coded, the
receiving equipment is only expecting
to receive a series of ones and zeros,
so any other interference is ignored,
resulting in very high quality audio.
•
Interference free reception.
Analogue systems suffer from an effect
called "multipath distortion". This is
6
caused because radio waves do not
behave in an orderly fashion, but
bounce and reflect off buildings and
mountains etc. DAB sees this as an
advantage and uses the direct and
reflected signals to actually reinforce
the end result.
•
No need to re-tune.
A single DAB frequency can be used
to cover the whole of the UK, so solving
many of the problems experienced
with the earlier analogue system.