Partial map resolution problem

[Kronos98]

I have twin HDX-1100s and 2 occasions recently the top part of the map became fuzzy (poor resolution and hard to read). This was also the direction of travel so the fuzziness gradually crept down the screen. The secondary screen wasn't affected. Changing the map scale made no difference. Rebooting the screen resolved the problem but I didn't try that in flight.

I should have taken a snapshot and will do next time.

Also maybe I'll should try swapping USB sticks.

It seems odd that it only happened twice over about 40 flights so far.

 

[maartenversteeg]

Are you sure this was fuzzyness of the map and not a weather overlay. When no ADSB data coverage is available and weather display is selected a dark red is overlayed and that might look like a reduction in resolution. That woudl also match your description that while flying the 'fuzzy' part moved down as the ADSB data block is a fixed ground location. An resetting the system makes it start alover so there is initially no ADSB data. If you go to the layers menu and switch off the weather layer you should be able to see if the 'fuzzyness' goes away

 

[Guenin]

I had the same experience recently, on a flight to South Dakota (although I use two AFS 5600s for my PFD and MFD rather than the HDXs you have, the symptoms are identical). It turns out I hadn't instructed the Seattle Avionics Download Manager to include South Dakota in my list of states to download VFR sectionals for. So if this occurred on a flight outside your normal flying area, make sure you have the VFR sectionals for that area downloaded. Otherwise, I believe it'll just try to display the underlying base map, which is of much lower resolution.

This doesn't answer the question of why it happened on your PFD but not your MFD; unless, of course, you somehow have different regions downloaded onto the two USB drives.

 

[Kronos98]

Thanks for your responses.
I'm in New Zealand and we don't have weather input available, but I was approaching an area with increased ADSB traffic.
The more I think about it the more it seems to be a USB read issue (hardware or software).
I've passed it on to Dynon.

 

[Guenin]

If it helps, this is what mine looked like. When I first noticed it (I'm headed northeast; notice how the southwest portion is sharp while northeast is blurry):

Sixteen minutes later, it was getting even worse to the east, and essentially illegible:

 

[Kronos98]

Yes, a very similar effect, but my secondary screen was OK and it doesn't happen every time I go thru the same airspace.