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4 Reference guide
The following sections describe the different concepts and menu screens of Blaupunkt .
4.1 Concepts
The following sections describe and explain navigation-related concepts.
4.1.1 2D/3D GPS reception
The GPS receiver uses satellite signals to calculate its (your) position and needs at least four
signals to give a three-dimensional position, including elevation. Because the satellites are
moving and because objects can block the signals, your GPS device might not receive four
signals. If three satellites are available, the receiver can calculate the horizontal GPS position
but the accuracy is lower and the GPS device does not give you elevation data; only 2D
reception is possible.
Several factors have an impact on the deviation between your real position and the one given
by the GPS device. For example, signal delay in the ionosphere or reflecting objects near the
GPS device have a different and varying impact on how accurately the GPS device can
calculate your position.
4.1.2 Natural and TTS voices
Natural voices are the traditional type of voice instructions. Every phrase that occurs in voice
guidance messages is recorded in a studio with a real person. The advantage of pre-recorded
voice is that it sounds really natural, but the range of instructions that can be given this way is
limited. Location-specific information such as street names cannot be announced.
TTS technology provides a machine-generated way to give voice instructions. The advantage
of TTS is that it can announce street names, traffic events, route summary, and traffic rules.
4.1.3 Alert Points
The following warning types are available:
Audio warning: beeps are played (if the voice guidance language that you selected is a
natural voice) or the type of the alert can be announced (TTS voice) while you are
approaching one of these points, and an extra alert warns you if you exceed the given
speed limit while approaching.
Visual warning: the type of the Alert Point, its distance and the related speed limit
appear on the Navigation view while you are approaching one of these locations.
For some of the Alert Points, either the enforced or expected speed limit is available. For
these points, the audio alert can be different if you are below or above the given speed limit.
Only when speeding: The audio alert is only played when you exceed the given speed
limit.
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