ADSB Problems...need help

[Techintime]

I have an RV-8 with a Dynon Skyview, DYNON GPS-250, SV ADSB-470 (ADSB in and out), comant C1-101 ADSB antenna. I also have a Garmin 430 WAAS GPS connected. I have owned the aircraft since July of this year. I have flown it about 20 times. I received a nasty-gram from the FAA about my ADSB performance. Apparently it has been having problems for quite some time, perhaps even since installation of the system two years ago by the previous owner. I have the current software loaded and attempted to accomplish the service bulletin (dated June 3 2019) concerning the ADSB. but apparently my system does not need it. I also get occasional own aircraft traffic calls...traffic alerts at zero range and zero/very-little altitude difference. I have pasted in the FAA reports below. Any ideas on how to fix this would be greatly appreciated.

 

[HFMan]

The ADSB-470 is not both in and out, it is only a receiver. Do you have an ADSB transponder, such as the SV-XPNDR-261? If you do, you still need the SV-GPS-2020 GPS- the GPS-250 is not ADSB compliant.

 

[airguy]

As mentioned above, ADSB-OUT is what the FAA cares about, and that is sent through your transponder. The transponder can get the ADSB information from the 430W or from the Dynon Skyview system, but if you are using the Skyview then you'll have to upgrade to the GPS-2020 receiver, since the 250 is not certified for ADSB.

The 470 unit is only for reception of ground-based ADSB-IN signals - and has been retired and replaced by the 472 to help solve a lot of early issues.

 

[GalinHdz]

Adding to what airguy posted, if you use the G430W then it must have software version 5.0 or higher and it must be connected directly to the DYNON SV-XPNDR-261 transponder via a 1.2Kohm resistor.

 

[DBRV10]

And the transponder software needs to be current possibly.....lots of things to check here.

Sounds like you need to read the manual (installation) and check the configuration. Maybe the GNS430W is not connected or the output is not set up right. Maybe the SV is not set up right.

 

[kellym]

And the transponder software needs to be current possibly.....lots of things to check here.

Sounds like you need to read the manual (installation) and check the configuration. Maybe the GNS430W is not connected or the output is not set up right. Maybe the SV is not set up right.

The 430W needs to connect from one of the serial outputs on the Garmin, to the 261 with the resistor, and the serial output be set to the ADSB+ format. It will not work with other outputs like the old ADSB format or Aviation output format. If you have all that right, once the 430 acquires enough satelites the Dynon transponder will that it is compliant, and the output will change from airborne to ground. If you get all that go fly for 20-25 minutes, land, wait 15 mins and send the evaluation request, and it should be clean. Be sure to follow the install instructs strictly. All the settings are there for connecting to ARINC 429 adapter to the 430 and connecting the Garmin to the transponder. So you need a second serial out put from the ARINC 429, set to Aviation Output.

 

[DBRV10]

The 430W needs to connect from one of the serial outputs on the Garmin, to the 261 with the resistor, and the serial output be set to the ADSB+ format. It will not work with other outputs like the old ADSB format or Aviation output format. If you have all that right, once the 430 acquires enough satelites the Dynon transponder will that it is compliant, and the output will change from airborne to ground. If you get all that go fly for 20-25 minutes, land, wait 15 mins and send the evaluation request, and it should be clean. Be sure to follow the install instructs strictly. All the settings are there for connecting to ARINC 429 adapter to the 430 and connecting the Garmin to the transponder. So you need a second serial out put from the ARINC 429, set to Aviation Output.

Exactly........The OP needs to download the manual and work through all the things configuration, then when that is correct look at wiring.

 

[Techintime]

I appreciate all of the help that is coming in. Here is a list of all of the comm/nav equipment that is on the aircraft. Everything works great with the exception of the ADSB. Hopeful that it is something simple to get this one item up to speed.

 

[Techintime]

The ADSB-470 is not both in and out, it is only a receiver. Do you have an ADSB transponder, such as the SV-XPNDR-261? If you do, you still need the SV-GPS-2020 GPS- the GPS-250 is not ADSB compliant.

Yes on the SV-XPNDR-261. Full list of equipment added to this thread.

 

[djones]

First thing I would look at given the SIL and SDA both being zero is the gps data source setting in the transponder setup menu.
go to the setup menu's, go to TRANSPONDER SETUP > GPS DATA it should be set to ADS-B / ADSB+ if it is using the Garmin as
the position source. Contact us directly at support@dynonavionics.com for more help if needed