Tom Tom 910 Country Map Change Delay

[Mick2me]

I use the 910 in the US and UK.

When I change the maps over on each side of the atlantic, it takes
ages to find a new route in the different country. Maybe 20-30 minutes

Is this due to finding local satellites?

Can this delay be reduced?

[vicky]

I found with the 910 the best way to reduce the delay was to manually centre the gps position on current location when arrival in the US or UK

By default when you switch map the 910 centres poisition on the centre of the map (Europe or USA) so if you are on the East or West Coast of the US the unit will be centred some 1200 miles or more from current position,

By setting telling the unit your current position manually I found that sped things up considerably. Normally this way I could switch on and put the unit on the roof of the car and in the 5 mins it took to get bags in the trunk and wire in the car charger it had a lock. (Also make sure qicckfix is up to date).

That was the best way I found with the 910. (Now using 920 and 930 seems a lot quicker without doing the above)

[Mick2me]

Thank You

But how do you set your position manually?

[Darren]

Have a read of this:

http://www.pocketgpsworld.com/howgpsworks.php.

It explains why you have this delay, just give it the time it needs to grab updated almanac and ephemeris data and it'll all be dandy!
_________________
Darren Griffin

[Brickie64]

Darren,
A very interesting article. Explained a lot of the basics I'd been wondering about for a while.

Do you have anything similar that explains about the comparison between older and newer more sensitive receivers ?

Nice one

Gav
_________________
"A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible"

Garmin Nuvi 3598 + GO 720 (+USA Map Card) + NavFree for iPhone in case all else fails ;-)

[Darren]

[Brickie64]

I'll keep an eye out. Look forward to it - Gav
_________________
"A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible"

Garmin Nuvi 3598 + GO 720 (+USA Map Card) + NavFree for iPhone in case all else fails ;-)

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