TechniSat DigitRadio 300 - Manual (Page 9)

9
Do not listen to the radio at high volume through headphones. This can lead to per-
manent hearing damage. Before using headphones adjust the sound volume to the
minimum level if you (not supplied ) to connect a pair of headphones, the internal
speaker is muted.
>Use only headphones with 3.5mm stereo plug.
>Plug the headphones into the headphone jack of the device. The sound reproduction
is now done exclusively through the headphones.
>If you want to listen through the speakers again, unplug the headphones from the
headphone jack of the device.
connection of an external sound source
You are able to transmitt the sound of an external device (e.g. MP3 Player, CD-Player)
via the loud speacker of your DAB radio.
Connect the audio cable to the (3.5mm jack) to the audio out of the external device to
the AUX-IN at the rear panel of the radio.
DAB mode
What is DAB?
DAB is a new digital format, through which you can hear crystal clear sound in CD
quality. DAB Broadcast a high-speed data stream in the radio channel. In difference to
conventional analog radio DAB transmitts multiple channels on the same transmitter.
This is called ensemble or multiplexes. An ensemble consists of the radio station as
well as several service components or data services, which are sent individually by the
radio stations. Learn e.g. under www.digitalradio.de or www.digitalradio.ch.
Data compression
Digital radio uses the of advantages of human hearing. The human ear does not
perceive sounds that are below a certain minimum level. Data which are under the
so-called threshold in quiet can be filtered out. This is possible because in a digital
data stream for each information unit, the corresponding relative volume is also saved
for other units. In addition in a sound signal, the quieter portions are overlapped by
the louder for a given threshold. All the sound information in a piece of music that are
below the so-called hearing threshold can be filtered out of the signal to be transmit-
ted. This leads to a reduction of the transmitted data stream, without any noticeable
difference in sound to the listener ( MUSICAM ) process.
Audio Stream
Audio streams are continuous data flows, MPEG 1 Audio Layer 2 frames contain and
thus represent acoustic information in digital radio. Thus, familiar radio programs can