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Technisat Digitradio 630 Manual

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9.2 DAB radio reception
> Press the MODE button as often as required until DAB Radio appears on the display.
Alternatively:
> Press the MENU button and select Main menu > DAB.
If you are in a submenu, select the Main menu as described in Section 5.1.
If DAB is being started for the first time, a complete station scan is performed. The station list is then
shown (see Section 9.2.2).
9.2.1 Performing the station scan
The automatic "Complete scan" scans all DAB Band III channels and thereby finds all stations being
broadcast within the reception range.
In order to perform a complete scan, open the menu by holding down the Info/Menu buon and use the
Tune +/ - and Enter buons to select the menu item [Complete Scan].
> In order to perform a complete scan, press the SCAN button. "Scan" appears on the display. The scan
starts and the progress bar appears on the display.
> When completed, press p or q and OK to select a station.
> Alternatively: press the MENU button and, using p or q, select the Complete scan item. Confirm by
pressing OK.
If no stations are found, check the antenna and change the installation location if required (section
4.3.2).
9 The DAB function
9.1 What is DAB+?
DAB+ is a new digital format through which crystal clear sound with no noise can be heard. Contrary to
conventional analogue radio transmitters, with DAB multiple stations are transmitted 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 more
information go to e.g. www.dabplus.de or www.dabplus.ch.
9.1.1 Data compression
With this, digital radio takes advantage of the properties of human hearing. The human ear does not perceive
sounds which are found under a specific minimum volume. Data which are found under the so-called audibility
threshold can, therefore, be filtered out. This is possible because, in a digital data stream, the relevant relative
volume for other units is saved for every unit of information. Moreover, in an audio signal, the quieter parts are
superimposed by louder ones at a specific limit value. All audio information in a piece of music that is below
the so-called listening threshold can be filtered out of the transmitted signal. 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 -
supplementary codification process for DAB+).
9.1.2 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 not only with excellent sound quality radio but also additional information. This could relate to the channel
currently being broadcast (DLS e.g. track, artist) or be independent of this (e.g. news, weather, traffic, tips).
BDA_DIGITRADIO_600_630.indd 36-37 22/06/2018 09:31
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