Lost NAVSRC worse after upgrade to 5.4
- Thread starter JR
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We know that it at least doesn't fix the issue for some people, but it doesn't hurt to try it.
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An update here - we're going to be taking another crack at a fix for this issue. I'm not quite sure when we'll have a version posted. It's at least a few weeks away, but there will be more to come.
Hi, Just looking for an update to the Nav Src lost issue. Your post on 9/19 is now several weeks old so was hoping for some news. Been following this thread for awhile looking for a solution. I have a D180/AP74 Garmin 196 outputting NMEA at 4800. Getting constant Nav Src lost errors. I have a GPS test route setup for testing and will encounter 5 to 10 errors when in NAV mode. I have also logged the Garmin NMEA output on this course and it has been perfect. Output is every 2 seconds with complete data streams. One note though, even if the Garmin proprietary data is turned off, it does still output a couple of Garmin only sentences, just not all of them. Other than this issue, I really like the D180 but this is a big one.
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We're still working on it. Do you happen to have a lot of the 196 stored? And did you happen to record the log of that happening during the same flight(s) that you were getting nav source errors on? If so, can you email the log (if not huge) to support at dynonavionics dot com, with a link to this thread for reference?
Flew again in RV-12, Dynon D-180, Gamin 396, auto pilot nav worked fine...was 1/2 mile off course, upon activating, it turned to the course, turned again when on course, and tracked just fine...no drop outs ! Why? Last trial was a drop out every three minutes. Today just perfect !
ChiefPilot
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I see this error on a regular basis as well - perhaps once every thirty minutes; sometimes more. EFIS-D10A, AP74, Pitch+Roll Servos, and EMS-D10 are all on the DSAB. GPS is a KLN-89B connected serially (of course).
Aside from the nav source lost issue, this combo works exceedingly well - the turn anticipation feature of the KLN89B effectively works just like GPSS. I just wish the nav source thing would get fixed so that functionality would be reliable.
Aside from the nav source lost issue, this combo works exceedingly well - the turn anticipation feature of the KLN89B effectively works just like GPSS. I just wish the nav source thing would get fixed so that functionality would be reliable.
Probably just stating the obvious but....
My AP and D100 were interfaced to a Garmin 496 for 3 years without issues. Last month, I upgraded to a Garmin 795 and the AP has continued to run flawlessly.
This implies that software in the D100, 496 and 795 are not at fault. Is it possible that noise in a specific installation causes random data loss somewhere across the serial bus?
My AP and D100 were interfaced to a Garmin 496 for 3 years without issues. Last month, I upgraded to a Garmin 795 and the AP has continued to run flawlessly.
This implies that software in the D100, 496 and 795 are not at fault. Is it possible that noise in a specific installation causes random data loss somewhere across the serial bus?
dstclair's post illustrates the issue well: It's hard to reproduce across the fleet reliably. We should have another crack at solving this ready very shortly. Because the problem seems to strike some and not others, with the same GPS, there isn't a list GPSes that are known to work perfectly.
DBRV10
Active Member
Simple, how about a GNS430W or any of the similar types that output an ARINC429 data stream. You will need a HS34 as well or for the skyview the ARINC module.
We have not had one drop out in 800 hours
Have you ensured all cell phones are off? Just a thought.
We think we may have it this time (we've said that before, and we've been wrong), so we're crossing our fingers. Should have something to post in about a week if our first round of testing holds up.