Michelin Navigation Manuel d'utilisateur télécharger pdf (Page 7)

5. GPS

5.1. HOW TO INITIALISE YOUR GPS

Plug in your ViaMichelin portable GPS device, and in the

Main Menu, click on SET > Information >

GPS Status. Wait a few moments while the GSP initialises until the “rcpt OK” indicator appears (above

the green bars) replacing the message “detect sat”.

Your ViaMichelin portable GPS device is now ready to use GPS data to locate your position.

5.2. HOW IT WORKS

GPS stands for Global Positioning System. This system is made up of a set of American

satellites that continually transmit positioning signals to all points around the world. These

signals are received by your ViaMichelin Navigation portable GPS device, which determines

your location and guides you to your destination.

The ViaMichelin Navigation portable GPS device integrates

the latest generation GPS (SiRF Star III) technology to offer

you high-quality navigation.

For the best reception, we suggest you place yourself in an

open space.

The time required for GPS acquisition varies according to your surroundings:

Athermic windscreens

Athermic windscreens: if your vehicle is equipped with an athermic

windscreen, GPS reception may be slower.

Reduced view of the sky

In the city, if there are high buildings, narrow streets or many trees (“urban

canyoning”), reception will be slower. Move to an area clear of obstructions to

improve reception.

Climatic conditions: in bad weather (heavy snow, for instance), GPS reception may

take a little longer.

No view of the sky

As satellite signals cannot pass through walls, you will therefore not receive any

GPS signals if your device is in a building, parking lot, or a tunnel, for example.

5.3. INITIALISING YOUR GPS

On initial use of your ViaMichelin Navigation portable GPS device, we therefore recommend you move to an

area clear of obstructions to obtain the best possible reception. First-time initialisation of GPS can take several

minutes depending on the environment and quality of the reception of GPS satellite signals.

The time required by the GPS for acquire this information varies depending on when the device was last used:

• If you switch on your ViaMichelin portable GPS device after it has been switched off for several

minutes, satellite positioning is almost instantaneous (“hot start”).

• If your ViaMichelin portable GPS device has been switched off for more than 4 hours, the GPS can

take up to five minutes and the “Currently obtaining satellite signals” appears on the navigation screen

(“warm start”).

• If your ViaMichelin Navigation portable GPS is only used occasionally, and has been switched off for

more than 24 hours, in this case, GPS initialisation can take from between 10 to 15 minutes (“cold

start”), and the “Detect satellites. This may take several minutes” message appears on the navigation

screen .

5.4. HOW CAN YOU CHECK THAT YOUR GPS IS WORKING?

To check that your ViaMichelin portable GPS device is receiving GPS signals, go to the “GPS” screen on your

PND:

Main Menu > Set > Information > GPS Status

Fig. 4 – GPS

The green “V” shows that the GPS is activated.

• “detect sat / rcpt OK” indicates that the GPS is in the process of receiving the satellite signals or that

reception is correct.

• “SAT:” indicates the number of satellites used to calculate the position.

• The vertical bars show the satellites detected:

• - grey The device is receiving the signals from the satellite indicated but is not using them to

determine the position (start of reception, the signal is too weak, etc.).

• - green The device is using the signals of the satellite indicated to calculate the coordinates.

• The numbers located under the vertical bars indicate the number of the satellite.

• The coordinates: longitude and latitude determined by the GPS.

• The directional arrow: indicates the direction taken between two GPS positioning calculations.

If the position determined by the GPS is outside of the limits of the map installed in the system, the GPS location

marker may appear in the middle of a blank screen. Zoom out to locate the GPS position with respect to the

map set installed in the system.

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Michelin Navigation Manuel d'utilisateur Page 7

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