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  1. #161
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    lolypop000's Avatar
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    Quote Originally Posted by lolypop000 View Post
    I realy don't understand anything anymore and i give up for now
    Quote Originally Posted by catymag View Post
    Lol I dont believe it
    You're right, i can't give up and also I can not sleep well at night becouse all the time I think about this problem and how to find a solution for this.

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  3. #162
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    Quote Originally Posted by giuseppe66 View Post
    In my test i've see that is not important how many satellities you have but how many signal you have on i single satellites. another test that i've do is for receive more satellites: i've delete all files in GPS directory then turn ON and (on open space), go to secret menu and select EPHER....and COLD.. and wait for 10-15 minutes for best reception without go out from that menu. I've see the reception of all satellites but accuracy always 8 - 12 about. So i've understund that accuracy is depending from quality and not from number
    Hello,

    Exactly, I agree with you.

    Guys, look my sattelite page:

    [Only registered and activated users can see links. ]

    All the time my signal looks worse just running slowly. This was my better accuracy today.
    The image above I was stopped with sky clear and no clouds.

    PS: I was using your GPS files @lolypop000. So looks me worse than the other GPS files that @catymag share with us.
    PS2: I will flash again the original 37XX firmware just to compare the satellite page.

    []'s
    Last edited by rfb; 16th February 2013 at 23:08.

  4. #163
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    Look at post #160 and you will see why is worse satellite accuracy with files from original 3790.
    Use for now files, that give you better accuracy and we will investigate forward.
    I hope that one day we find solution for all nuvi with low accuracy.

  5. #164
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    Giomen's Avatar
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    Quote Originally Posted by lolypop000 View Post
    You can see that after convert mt.nvm change number and this number you find 3x in 34xx FW, but this number is not present in 37xx FW
    I was searching in archive. For 34xx SW3.50 in FW is present MNL_VER_11061401GRMN01, in mt.nvm from device with this SW - 11061401.
    Love your wife? Buy yourself a GPS for answering to her favorite question: "Dear, where are you?".

  6. #165
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    Neil's Avatar
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    Quote Originally Posted by lolypop000 View Post
    You're right, i can't give up and also I can not sleep well at night becouse all the time I think about this problem and how to find a solution for this.
    Quote Originally Posted by lolypop000 View Post
    We need more users like you @rfb who try to solve this mistery
    Kudos to rfb, giuseppe66, Angelo and all others prepared to take the time testing their units.
    Loly,
    Do you want me to convert my newer virgin 3790 to see how it performs? I would have done that already but thought maybe there is a need to have an original 'never-coverted' 37 as a reference. My convert is an earlier produced unit, whereas my 3790 is of later production. There is over 14,000 difference in the S/No of these units, so assuming that the S/Nos are not allocated in 'blocks' to different factories, one is amoung the first 2000 production units and the other amoung the later 15-16,000. There seems to be some loose anecdotal link between acceptable accuracy in earlier units, and unacceptable in later ones, maybe? If you want me to switch them around, let me know and i'll do it and test further. But really, i think the evidence is mounting that only a fw fix will help those with unacceptable accuracy.

    @rfb;giuseppe66
    I agree that quality of signal is more important than quantity of sats locked on. This is logical when you put it in terms of basic map reading. Better to have 3 very accurate back-bearings to prominent features than 6 highly inaccurate ones. The 'triangle of error' will always be more accurate and less confusing with the fewer accurate readings, whether it is obtained by compass or GPS device. My convert 34 never manages the same number of sat locks or quality of signal as my 37, but it's still way better in lock, quality and accuracy than you 2 guys have.

    Are you and anyone else able to confirm that your units are of earlier or later production? Then we can compare accuracy with age of unit.
    My converted early unit's sticker has:
    nuvi 3790 1W800xxxx (in single line, without 'S/N:' in front of 9 digit/letter serial)
    and my later original one has in 2 lines:
    nuvi 3790
    S/N: 1W80xxxxx
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  7. #166
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    We have in

    37xx = 10081601GRMN01

    34xx = 11072801GRMN01

    @Caty,Neil
    What version FW do you use when you convert 37xx to 34xx?

    p.s.
    @rfb;giuseppe66;isg
    What version of FW do you use when convert 37xx to 34xx?
    Last edited by lolypop000; 16th February 2013 at 23:51.

  8. #167
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    I think I had 37xx sw 4.60 the first time I converted it. On November 2011
    Edit :now i use my sd files from
    [Only registered and activated users can see links. ]
    and I use 4.90
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    You have to navigate to get to the good.
    Nuvi1250/Nuvi 34xx/Nuvi 2200/Nuvi 66/Oregon 600/Galaxy S5 MM 6.0.1/TomTom GO/iGO Nextgen Avic,Basar,Isr.Gift/Navigon
    Please don't flood my pm box with questions you can post on forum!! You won't hear back from me.

  9. #168
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    For current conversion, initially 7.50, presently 7.60. Previous conversions were with with earlier fw versions of course, but i don't have backups anymore. Accuracy was always the same (acceptable) as far as i could tell with all fw versions though.

    PS: Oh, sorry. You mean what 37xx fw? Not sure, either 4.90 or 5.00 for last conversion, probably 4.90.
    EDIT: Definitely 4.90 for latest conversion, just found the NV backup.
    Last edited by Neil; 17th February 2013 at 00:20.
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  10. #169
    Navigation software expert

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    I hope that we will find that problem is in what fw you convert 37xx to 34xx, but now i see that caty and you have different fw bofore converting.

    And now i am back at the begining

  11. #170
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    But for our latest conversions, both Caty and I used 4.90.
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