AndersB

I have done some testing and compared the GM270 Ultra against my old Garmin GPS96.
I tested outside with a perfect clear sky. I hade used the GM270 on the same place the day before (with a 3D fix).The GPS96 hade been used a week befor 200 km from the testing spot.
With the Garemin I got a 3D fix after 30sek with 6 satelits.
The Ultra found 11 satelits and after 7min it used 3 of them for a 2D fix. I waited 10 min more to see if the Ultra would improve, but not. I don't understand that talk about the good prestanda for the GM270 Ultra. When I tested it at sea in a moving boat i never got any fix att all. Is it any problem with my unit or is the GM270 Ultra as bad? The documentation (the "manual") give no information how to use the GPS. What is the differens betwen hot-, warm- and cold start for example? I have tryed Holux website but they have no information to give.
Another question is if GPSViewer can be ?the bad guy? as I understand it, this program control the start of the GPS and show its status? Just after the test I shut down the AXIM and started it again. Then it started it was ?frozen? (after using GPSViewer befor I shuted it down) and I had to do a soft reset. After the reset I used VisualGPS to see the status of the GPS and it at once found 7 good satelits at a 3D fix.

Highsider

Quote:

Originally posted by AndersB I have done some testing and compared the GM270 Ultra against my old Garmin GPS96. I tested outside with a perfect clear sky. I hade used the GM270 on the same place the day before (with a 3D fix).The GPS96 hade been used a week befor 200 km from the testing spot. With the Garemin I got a 3D fix after 30sek with 6 satelits. The Ultra found 11 satelits and after 7min it used 3 of them for a 2D fix. I waited 10 min more to see if the Ultra would improve, but not. I don't understand that talk about the good prestanda for the GM270 Ultra. When I tested it at sea in a moving boat i never got any fix att all. Is it any problem with my unit or is the GM270 Ultra as bad? The documentation (the "manual") give no information how to use the GPS. What is the differens betwen hot-, warm- and cold start for example? I have tryed Holux website but they have no information to give. Another question is if GPSViewer can be ?the bad guy? as I understand it, this program control the start of the GPS and show its status? Just after the test I shut down the AXIM and started it again. Then it started it was ?frozen? (after using GPSViewer befor I shuted it down) and I had to do a soft reset. After the reset I used VisualGPS to see the status of the GPS and it at once found 7 good satelits at a 3D fix.

Have a look here for satellite fix comparisons and here for definitions of "cold/warm/hot" starts.

HTH
--
...Highsider...

P.S. I did try a CF GPS with an old version of Mapopolis in a shop once and wasn't impressed either with the GPS or the software. Perhaps Garmin's iQue will be what we're looking for or perhaps it's worth considering a BT GPS device....

gaffer

Hmm. My Holux Ultra has been able to track 10 satellites from inside my house. Wonder if you may have a defective unit?

__________________
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Daddy_O

My Ulitra 270 locks 10 to 12 sat's in 20 sec to 25 sec's from a cold start in my house. I love it worth the few extra bucks for the more powerful signal locking capabilities and with navigator its a fantastic gps combo..