Philips RC759 RDS - Page 9

- integrated in the CARiN system. The distance driven is recorded
inappropriate messages. This means that CARIN supposes the vehicle
THE CARIN NAVIGATION SYSTEM
With the CARIN system you have purchased a powerful tool to assist the driver in daily traffic.
By automatic route planning and guidance you can concentrate on the essential things in today's
growing traffic - especially in congested areas. Complicated and time-consuming planning with
conventional city and road maps is no longer required. You simply enter the destination before
driving off, activate ‘Guidance’ and CARiN does the rest. CARiN offers you guidance advice
in both an acoustical and visual way. Few controls and a simple menu structure ensure ease
of operation.
DETERMINATION OF THE VEHICLE POSITION
The movement of the vehicle is measured by sensors that are
by an electronic signal from the speedometer and the rotary
movements of bends by the gyroscope (a rotary measurement
system).The information from these sensors is, however, not
always exact as the values can be affected by skidding of the aes
wheels, varying tyre pressure due to changes in pees
temperature, etc. By comparison of these signals with the
digitized map, it is possible to correct any inaccuracies of the
sensors and to determine the position of the vehicle quite
precisely. In order to correct the data, a signal from the GPS
satellites is required for a period of several minutes.
Digital roadmap
GPS (GLOBAL POSITIONING SYSTEM)
The GPS System is based on the reception of navigation signals from
a total of 24 GPS satellites at a height of 21.000 km (13.000 miles).
To determine the position with sufficient accuracy, signals from at least
4 satellites must be received. You can check the number of received
satellite signals, see ‘Navigation menu’, option ‘i3 GPS position’. The
CARIN GPS receiver can handle up to 8 satellite signals simultaneously.
This allows an accuracy of about 30 m (20 ft) to 100 m (60 ft) which
is further improved by the other sensors.
When the vehicle is parked for a longer period of time, the satellites move on during this period.
Therefore, when the ignition is turned on again it can take a few
minutes before CARIN can pick up enough satellites and evaluate
the received signals.
When starting up, CARIN may tell you: “You are now leaving
the digitized area’. If there are other roads in the area, CARIN may send
is on another road.
. When the vehicle has been at a standstill for a longer period of time, the CARIN function may
be temporarily inhibited. CARIN will operate reliably again once the GPS reception is available
in sufficient quality.