Hi,Quote:
Originally Posted by Kanopus [Only registered and activated users can see links. Click Here To Register...]
So, please, what do you think to help with your criteria?
Maybe discover diferents things...
[]'s
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Hi,Quote:
Originally Posted by Kanopus [Only registered and activated users can see links. Click Here To Register...]
So, please, what do you think to help with your criteria?
Maybe discover diferents things...
[]'s
Quote:
Originally Posted by dasilvarsa [Only registered and activated users can see links. Click Here To Register...]
I joke...:))
sorry!!;))
Of course that was a joke...i've respect for all OUR work and OUR test for best accuracy :))Quote:
Originally Posted by Neil [Only registered and activated users can see links. Click Here To Register...]
Just found something:
Returning to 3790 from 3490, I was shocked from very very poor accuracy.
Well I deleted the 3 files in \.System\GPS\ARC.BIN, BEE.BIN, mt.nvm and everything was ok.
If you have problems you may try to improve accuracy and in this way.
Yes, Must do this to clear the "Hotfix Information" Nuvi will re-create files with new info.Quote:
Originally Posted by isg [Only registered and activated users can see links. Click Here To Register...]
If you do cold-start it will have the same effect.
You can also just delete the GPS folder - Nuvi Should recreate the folder.
If you decide to re-convert to 3490 do this again after re-convert.
Checking the option Cold Start (screen gps / height / cold start), I realized that the previously recommended procedure in this topic does not work, that is, select the option and restart the gps does not enable Cold Start. This option is very useful because it erases, probably, ephemerides, almanac and other information that are recorded in parts of protected memory of gps. To work effectively we must do the following: select the Cold Start option and then "Start Single" in the upper left corner of the screen. Note that the synchronization table is reset and restarted. Go back to the satellite screen quickly and check really the true reboot of satellites.
With regard of the "Predicted Eph" option (ephemeris predicted) what would it be? How Ephemerides are highly detailed information of orbits used by GPS to calculate the position of the satellites (not valid for more than 4 hours), I assume that enabling this option, the gps would be using Ephemerides data already stored to calculate the orbits of satellites. The Cold Start option is that would restart and would store the new Ephemerides information (and perhaps the almanac) sent by satellites (in hotfix files and, maybe in firmware too). To enable the "Eph Predicted" the procedure is the same as Cold Start. Thus we enabled the option can be observed in the table that the tuning of the satellites comes with Ephemerides, ie, are being used Eph data already stored in the GPS. Perhaps this option can be useful in places with difficult and/or low tuning satellites, but in practice does not seem to be useful in our case. When we enable the Cold Start option is observed in the table that gradually located and synchronized satellites and in sequence the Ephemerides data are received, ie, new data from eph, what really matter.
Finally, a recommendation to improve the "accuracy" that appears on the screen: as suggested by isg in previous post, delete the files in the folder System / GPS (arc.bin, bee.bin, mt.nvm). In satellites page we observe that restart of satellites, an apparent Cold Start, but the "accuracy" can go bad (happened to me). After satellites synchronization stabilized, make the procedure of Cold Start as described above and "accuracy" will improve immediately. Just not done yet comparative tests with the 3790 to see how much improved in relation to the original, or how long will last the improvement.
In short: I think always important to understand the reasons and above all, do not be afraid to expose doubt or unawareness, we are all learners, to varying degrees, including experts .. We are learning from each other .. Along this line who know clearly identify, or supposedly, the contents of files arc.bin, bee.bin and mt.nvm (hotfix files and..) would be giving a good collaboration.
Hard Reset and ClearNonVol causes an even more comprehensive Reload of Satellites and EPH
If you go to GPS SNR Logging Page you will see that the table is totally empty.
"Brain Freeze Cold Start"
The purpose of the post was not to show that Cold Start is not done by any means, but that it was not performed following the procedures that have been indicated and that alone seems to produce no effect on the "accuracy", first point. All those that installed the 3490 firmware also cleared the nonvol memory and know very well that not bring real improvement in the "accuracy" with this procedures.Quote:
Originally Posted by dasilvarsa [Only registered and activated users can see links. Click Here To Register...]
Everything indicates for me, in hypothesis, to a set of procedures that can cause improvement, but the explanations are still obscure. It seems that some information not desired is stored in any memory region, or file, which is not eliminates by Clear Nonvol. In my test, the set of procedures indicated (delete files of System\Gps folder + cold start) immediately improved the quality of the tune and in sync speed of satellites, what not happened before (if the variables are already with the best definitions, no noticeable improvement occurs). Such procedures are easy to implement, requires no effort and has no risk, it's worth trying.
"Brain Freeze Cold Start" ;)
Cold Start does improve "Reported accuracy" on 3490.
Before doing Cold Start "Lolypop Method" I had 9 meters "reported accuracy" indoor.
After Doing Cold Start "Reported Accuracy" shows 3 Meters, But after a few weeks it goes back to 9 meters "reported accuracy".
If you delete the GPS Folder and then do "Hard Reset" straight away it takes long to find satellites and yesterday evening I had to go outside to get sats.
After a long time I did get accuracy of 3 meters. This morning it took a while again to capture the remaining sats.
It took a few minutes for the Bars to Change from Hollow to Solid.(Needs to get actuall data from the Sat to change from Hollow to solid)
Actually your Method does work as well but it does not get "fresh data" It uses Historical Data from NVRAM or FILES.
The reasoning Here is that it happens very Quickly.
By Erasing both NVRAM and FILES you can be ensured of "Fresh DATA" "Takes very Long to Get Sats but if you wait long enough "Reported Accuracy" is good.
When you Downgrade firmware Hard Reset is forced by Garmin Firmware, NVRAM is cleared and Sats are totally re-loaded.
When you Upgrade Firmware to the next newer Level Generally speaking this is not done.
I agree. infact, when i've my old 37>34 with bad accuracy, i've try to delete GPS folder, clear nonvol, replace GPS folder with other used that have good accuracy but nothing. Now i've good accuracy but i must do convert to 37>34 and then 37>34 with old firmware and delete all system's file (GPS folder too of course, read post up). Of course first time i start nuvi, i've wait many time for fix but now i've good accuracy, 4-5 meters in my city, but never like 37xx that in my city is 3-4 meters