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Thread: G3X clock adjustment

  1. #1
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    Default G3X clock adjustment

    Has anyone have a solution for clock (local time) adjustment in a G3X ( not touch) that I have in my
    Carbon Cub SS I have researched the install manual to no avail, My clock local time is off one hour exactly,
    when I boot into set-up I can’t find a clock unit line

  2. #2
    Senior Member Andy's Avatar
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    Default Re: G3X clock adjustment

    Quote Originally Posted by ps9711 View Post
    Has anyone have a solution for clock (local time) adjustment in a G3X ( not touch) that I have in my Carbon Cub SS I have researched the install manual to no avail, My clock local time is off one hour exactly,
    when I boot into set-up I can’t find a clock unit line
    A manual UTC offset is available in G3X Touch but I can find no provision for changing time zone in any of the G3X (not Touch) manuals.

    Call Garmin support for an answer and, if they don't have one, request a firmware update.

  3. #3
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    Default Re: G3X clock adjustment

    Quote Originally Posted by Andy View Post
    A manual UTC offset is available in G3X Touch but I can find no provision for changing time zone in any of the G3X (not Touch) manuals. Call Garmin support for an answer and, if they don't have one, request a firmware update.
    thanks Andy I have reached out to Garmin via email, however no response as of yet

  4. #4
    Administrator Pete D's Avatar
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    Default Re: G3X clock adjustment

    Is the airplane outside and have satellite lock?

    I have seen some things like this correct themselves if the airplane hasn't flown in a long time, after the G3X gets connected to the satellites sometimes date/time gets updated.

    May or may not be relevant in this case.
    Pete Dougherty
    Customer Support Manager
    Cub Crafters Inc

  5. #5
    Senior Member Andy's Avatar
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    Default Re: G3X clock adjustment

    Quote Originally Posted by Pete D View Post
    Is the airplane outside and have satellite lock?

    I have seen some things like this correct themselves if the airplane hasn't flown in a long time, after the G3X gets connected to the satellites sometimes date/time gets updated.

    May or may not be relevant in this case.

    When a GDU 465 is first powered it starts its Real Time Clock at the "born on" date and time. For my system that is April 6 2019 at 5 pm local which is April 7 0000 UTC. The RTC increments from that date and time until updated by GPS time.

    I don't know if the G3X is similar but I would doubt that this older system includes an RTC that attempts to maintain UTC if the later G3X Touch system does not have that capability.

    One explanation for a hour error could be the aircraft is being operated in an Indian reservation in Arizona. A Garmin system will likely assume MST in summer since AZ does not do daylight savings. Problem is that some, if not all, of the reservations do use DST. I have been caught by this when scheduling delivery flights to Tuba City.

    I don't doubt the Op's problem is caused by a time zone error but only Garmin would know how they define the time zone boundaries.

  6. #6
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    Default Re: G3X clock adjustment

    Quote Originally Posted by Pete D View Post
    Is the airplane outside and have satellite lock?

    I have seen some things like this correct themselves if the airplane hasn't flown in a long time, after the G3X gets connected to the satellites sometimes date/time gets updated.

    May or may not be relevant in this case.
    the Cub is hangared and was inop for about a year until recently when it has made several short flights, I will check sat lock, with A/C parked outside for a few hours , sounds like this could be an issue

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