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GPS AGL Altitude Blank?!?!
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jimmyz80 View Drop Down
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    Posted: 13 Sep 2017 at 9:37pm
Is there any reason why one of my IFDs would show the GPS AGL altitude as being blank, yet my other IFD shows a correct number?  The really weird thing is, if I go into the datablock setup page and highlight that datablock, it seems to go back to normal for a minute or two before blanking out again.

Between this datablock being blank, and the decoded NAVAID datablock being blank, I'm not really feeling the datablock love here...
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oskrypuch View Drop Down
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I have never seen either be blank, when it shouldn't be. In particular if only one of your units shows this, you may have some sort of hardware fault.

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AviSimpson View Drop Down
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Originally posted by jimmyz80 jimmyz80 wrote:

Is there any reason why one of my IFDs would show the GPS AGL altitude as being blank, yet my other IFD shows a correct number?  The really weird thing is, if I go into the datablock setup page and highlight that datablock, it seems to go back to normal for a minute or two before blanking out again.

Between this datablock being blank, and the decoded NAVAID datablock being blank, I'm not really feeling the datablock love here...



Did you ever get a GPS CAS message like "Dead Reckoning"? Can you confirm that the 540 has the FLTA option highlighted on the AUX page? 
Simpson Bennett
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pburger View Drop Down
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Total guess, but I wonder if it has something to do with available space.  The 540 has the transponder info, which somehow might be squeezing the GPS AGL block such that it can't fit the 5 digits of the altitude?
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jimmyz80 View Drop Down
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Originally posted by AviSimpson AviSimpson wrote:

Did you ever get a GPS CAS message like "Dead Reckoning"? Can you confirm that the 540 has the FLTA option highlighted on the AUX page? 

No CAS messages at all, other than expected alerts for airspace, tank switching, etc.  I'll check the AUX page when I'm at the plane again on Sunday.  For what it's worth, I've only noticed this post 10.2.  Prior to that it worked perfectly.

I'm wondering if the CPU is overloaded in the unit or something.  I've also noticed that when I change zoom levels on the map page, it'll sometimes take 10-15 seconds to re-draw things.  For example if I zoom in when I'm near a fix that has an altitude restriction of "3000".  The entire map will be filled with a GIANT label of 3000 until it re-draws to normal size in 10-15 seconds.  It's not very confidence inspiring, considering this is my NAV1 unit, which I bet my life on when flying precision approaches.
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oskrypuch View Drop Down
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That is normal when rapidly resizing the map. The labels may be a little large or a little small for a bit until it rewrites.

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AviSimpson View Drop Down
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Originally posted by pburger pburger wrote:

Total guess, but I wonder if it has something to do with available space.  The 540 has the transponder info, which somehow might be squeezing the GPS AGL block such that it can't fit the 5 digits of the altitude?
Good guess but it would manifest on both units if that was the case. The datablock is the same dimensions (pixel wise) on both.
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AviSimpson View Drop Down
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Points: 765 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AviSimpson Quote  Post ReplyReply Direct Link To This Post Posted: 15 Sep 2017 at 10:25am
Originally posted by jimmyz80 jimmyz80 wrote:

For what it's worth, I've only noticed this post 10.2.  Prior to that it worked perfectly.
Since we made changes to the options, like FLTA, page it's possible that it is no longer highlight for some reason. It's an easy fix on our end.

Originally posted by jimmyz80 jimmyz80 wrote:

I'm wondering if the CPU is overloaded in the unit or something.  I've also noticed that when I change zoom levels on the map page, it'll sometimes take 10-15 seconds to re-draw things.  For example if I zoom in when I'm near a fix that has an altitude restriction of "3000".  The entire map will be filled with a GIANT label of 3000 until it re-draws to normal size in 10-15 seconds.  It's not very confidence inspiring, considering this is my NAV1 unit, which I bet my life on when flying precision approaches.
What ranges are you going from and to when you see this? How far are you panning, if at all, from your current location? What declutter, if any, do you have the map set to? It's inevitable that there is going to be a delay, 15 seconds sounds excessive.
Simpson Bennett
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