Volvo C30 Operating Manual page 23

Main unit
The system is hard disk based. For more infor-
mation, see page 28.
The main unit is fitted in the glovebox and
includes the following functions:
•
Calculating the position of the car
•
Calculating the route to the specified des-
tination
•
Handling traffic information
•
Voice guidance
•
Storing map data
•
DVD player; for updating the map data and
software.
NOTE
The main unit's DVD player is only designed
for Volvo's map discs.
The GPS and TMC receivers are integrated in
the main unit.
Positioning
The car's speed sensor and a gyro calculate
the current position and the direction of travel
of the car using signals from the GPS satellite
system.
The advantage of this concept is that the nav-
igation system registers and calculates the
01 Get to know your navigation system
route outline even if the GPS signal is tempo-
rarily lost, e.g. when driving through a tunnel.
Traffic information
TMC (Traffic Message Channel) is a standar-
dised coding system for traffic information. The
receiver automatically searches for the correct
frequency. Reception takes place via the FM
antenna.
The coverage area of the system is under con-
stant development which is why updates can
sometimes be necessary, see page 28.
Easy
Irrespective of whether or
user settings are selected, traffic information
transmitted is always received and presented.
For more information, see page 66.
Speakers
Navigation system audio uses the front loud-
speakers.
Component location and functions C70
Keypad
The keypad is located on the right-hand rear
side of the steering wheel. Use it to scroll
between different menu options, to confirm
selections or to move back in menus. For more
information, see page 24.
Screen
The screen displays maps and provides
detailed information on route type, distance,
menus etc. For screen care, see page 28
Advanced
IR receiver
The IR receiver for the remote control is located
adjacent to the screen on the speaker grille. For
more information, see page 24.
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