slow starting of gps rx

I have a bt 77 bluetooth receiver and an ipaq rc3715 bluetooth pda
the unit does connect up and is working ok but it takes up 15 minutes before the pda tomtotm softwarte finds a valid signal
is there somethink i need to do to make it pick up quicker it is a bit of a pain because i need to switch it all on about 15 mins or so before i go out because it is not picking up a sat quick enough is this normal

thanks
in advance

[getsurfers]

where are you turning it on? inside/outside? Does you vehicle have a heated or reflective screen?

Try turing the receiver and TT on outside with clear line of sight to the sky. Most GPS should find a signal and obtain a lock in 45secs or less under clear sky conditions.

Originally Posted by getsurfers

where are you turning it on? inside/outside? Does you vehicle have a heated or reflective screen?

Try turing the receiver and TT on outside with clear line of sight to the sky. Most GPS should find a signal and obtain a lock in 45secs or less under clear sky conditions.

Yes i have a heated front windscreen it also happens when in the house does this mean that i will need an external antenna?

[getsurfers]

If you get a lock outside the vehicle first, you should get a pretty instant lock.

Inside a building you are getting bounced signals, known as the urban jungle effect. Bit like when travelling between tall building such as I do alot in London. This is sat-nav users' nightmare for keeping/getting locks and position accuracy.

one other point of note i have it configured to other cable nmea gps what is the best baud rate to use?

[getsurfers]

Try 4800 or 9600. You should be fine on 9600, if not and experience issues drop to 4800.