TechniSat TECHNIRADIO 3, Instruction Manual

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7 DAB+ (digital radio) function
7.1 What is DAB+?
DAB+ is a new digital format through which crystal clear sound with no noise can
be heard. In contrast to conventional analogue radio stations, DAB+ can be used to
broadcast multiple stations on one and the same frequency. This is referred to as an
ensemble or multiplex. An ensemble is comprised of the radio station, as well as several
service components or data services which are broadcast individually by the radio
stations. For further information, please visit e.g. www.dabplus.de or www.dabplus.ch .
7.1.1 Data compression
By doing so, digital radio takes advantage of the properties of human hearing. The
human ear does not perceive sounds under a specific minimum volume. Data under the
so-called audibility threshold can, therefore, be filtered out. This is possible since, within
a digital data stream, the relevant relative volume for other units is saved for every unit
of information. Moreover, at a specific theshold, the quieter parts within an audio signal
are blocked out by the louder parts. All the sound information below the threshold
of hearing in a piece of music can be filtered out of the signal to be broadcast. This
leads to a reduction of data in the data stream to be transmitted, with no perceptible
difference in sound for the listener (HE AAC v2 process as a supplementary codification
process for DAB+).
7.1.2 Audio stream
With digital radio, audio streams are continuous data streams which contain the
MPEG 1 audio layer 2 frames and thereby represent acoustic information. This enables
standard radio channels to be broadcast and listened to on the receiver side. Digital
radio provides you with not only with excellent sound quality radio but also additional
information. This may refer to the programme being broadcast or be independent
information (e.g. news, weather, traffic, tips).
7.2 DAB+ (digital radio) reception
> Press the / Mode button until [DAB] is shown on the display.
If DAB+ is being started for the first time, a complete station scan is performed.
Make sure that the telescopic antenna is fully extended when doing this. After
the scan is complete, the first station is played back in alphanumeric order.
7.2.1 Performing a full scan
The automatic scan Full scan scans all DAB+ Band III stations and thereby finds
all stations being broadcast within the reception range.
After the scan is complete, the first station is played back in alphanumeric order.