WAAS GPS integration

[tomkk]

I'm just beginning to look at adding a certified WAAS GPS (e.g. GPS 400W, GTN 625) to my Skyview system so these will be some pretty basic questions. I'm just beginning the learning process.

Looking at it from a 10,000' level, it seems like it involves just adding the GPS unit, an appropriate GPS antenna (defined by the GPS unit), connecting the GPS to a Dynon ARINC 429 unit (I think that connection is just two shielded twisted pairs and one single wire serial), connecting the ARINC unit to Skyview with a Skyview network cable then configuring the Skyview ARINC, RS-232 and transponder pages?

Is that all there is? This seems to be pretty straight forward because Skyview and its network really handles the integration.

The GPS has outputs that can go to a transponder, OBS indicator, audio panel, etc. but I think those are not used with an EFIS and, in particular, Skyview has all the data it needs from the ARINC and will transmit the appropriate data to the SV-XPNDR-261 I currently have? Will that satisfy all the ADS-B 2020 requirements?

Some specific questions:

The Skyview ARINC Installation section indicates that SV-ARINC-429 pin 3 (Serial RX) should be connected to GTN pin 8 (RS-232 Out 1) but doesn't indicate what format that GTN RS-232 should be configured to?

The Skyview ARINC Installation section also contains info for integrating with the Garmin 430/530 with instructions "If Dynon’s SV-XPNDR-261 is being used for ADS-B Out capability: Another 430/530 serial output should be set to “ADS-B+ OUT” format". I don't see a GNS 430W RS-232 configuration that provides a “ADS-B+ OUT” format" choice?

 

[Carl_Froehlich]

Look at the SkyView install manual section 12. It shows what connections to make. The GTN settings and ARINC settings are all listed (page 12-8 and 12-9). The ARINC eliminates the vast majority of legacy hardwired connections to analog HSI/CDI heads and such.

For my GTN-650 I use serial #1 output to go to the ARINC, and serial #2 output to go to the transponder (via the 1.21K ohm resistor - page 11-8) for the ADS-B out position source.

For the 430W it must have update 5.0 or later to get the needed ADS-B+ output. See page 5-7 of the GNS-430W Rev J install manual. If you like a PDF of this manual send me your private email address.

Carl

 

[swatson999]

Remember that if you are using a SV transponder, you can (soon, I hope) just use the Dynon GPS as the WAAS source for ADS-B, thus saving yourself running another wire to the transponder (I'm assuming that, like many of us, you get a Dynon GPS source in addition to your Garmin, so that you have a relatively inexpensive navigation backup).

 

[tomkk]

Thanks, Carl. The SV Installation manual is where I got a lot of my info. In your 650 output RS 232 configuration, what selection did you use serial #2 output?  #1 is supposed to be set for ADS-B+ but didn't see anything for #2.

 

[Carl_Froehlich]

Tom, I use the GTN-650 serial #1 output for the ARINC. Page 12-8 tells you to set the GTN-650 serial output to "HIGH-GAMA Format 2". I use the GTN-650 serial #2 output for the ADS-B output to the transponder. Look at page 11-18 for where it tells you to use ADS-B+ output for the GTN serial to transponder GPS feed.

Carl

 

[Garrett]

I wish Dynon would come out with a integrated Nav solution so I can get rid of my GTN-650

 

[tomkk]

Tom, I use the GTN-650 serial #1 output for the ARINC.   Page 12-8 tells you to set the GTN-650 serial output to "HIGH-GAMA Format 2".  I use the GTN-650 serial #2 output for the ADS-B output to the transponder.  Look at page 11-18 for where it tells you to use ADS-B+ output for the GTN serial to transponder GPS feed.

Carl

Darn, I missed that Thanks, Carl ...