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  #11  
Old 07-20-2009, 01:05 PM
apatti apatti is offline
 
Join Date: Dec 2005
Location: Middle Georgia
Posts: 654
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Well, I took the GPS and the GRT for a ride on Saturday (note my last name ends in a vowel ). Unfortunately, it was only in the two dimensional world. However, I didn't have any trouble with the setup. Everything worked as expected. So, I am guessing my intermittent problem had something to do with the GPS being indoors and possibly loosing signal. I wish there was a way on the GRT to display how many satellites the GPS is "seeing". Anyway, it was exciting to see this work.

I am planning on building a little shelf on the firewall in the engine compartment on which to mount the GPS puck. I will also mount the 430 GPS antenna there. Does anyone have any experience with doing this? I am wondering if the hockey puck GPS might emit some RFI that would interfere with the 430 GPS antenna. I would hope Garmin sealed (RF-wise) the GPS-18 pretty well. Do I need some distance between the two?

Thanks,
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  #12  
Old 07-20-2009, 02:17 PM
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Ironflight Ironflight is offline
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Location: Dayton, NV
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There is a GPS status page in the setup menus Tony - I forget right now how to get to it, but it's there somewhere (about two layers down) - shows a sky map and everything! I suspect that you were losing lock due to blockage.

My 430 Antenna is on a shelf on the firewall, and my GPS-18 was on the glare shield, so they seemed happy with that distance of separation. I've had as many as three self-contained GPS "hockey-pucks" on my glare shield at one time without any problem, if that means anything...

Paul
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  #13  
Old 07-20-2009, 02:51 PM
apatti apatti is offline
 
Join Date: Dec 2005
Location: Middle Georgia
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Thanks, Paul. Sounds like the hockey pucks can peacefully reside near one another. That helps a lot.
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  #14  
Old 07-20-2009, 04:57 PM
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Kahuna Kahuna is offline
 
Join Date: Dec 2004
Location: Gold Hill, NC25
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You may find the technical specs for the Garmin gps 18 unit here or here.

Software for configuring the unit can be found here.
Best,
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  #15  
Old 07-20-2009, 05:22 PM
DGlaeser DGlaeser is offline
 
Join Date: May 2005
Location: Rochester Hills, MI
Posts: 879
Default Got one, works great

Quote:
Originally Posted by Kahuna View Post
While playing with the APRS stuff, I have had the chance to hold in my little hand a complete 12 channel, WAAS, GPS the size of the small black puck antennaes. Its less than $60 from Byonics.

It requires 5v, gnd, and is outptting NMEA.

My question is, instead of the $400 external GPS from GRT, why not have this little bugger? I do notice that the pin outs for GRT do not have +5volts. No doubt that the system has it given that most off the shelf embedded GPS's require it. Is the NMEA data stream fields enough for the grt to be happy and do all it needs including all A/P controls?

This little puck can sit on your glarehield and do it all I believe.
What am I missing?
That's exactly what I have as GPS2 on my Sport. I took the power from the EIS (the 4.8V supply for the fuel gauges).
My reason for doing it is that my 300XL doesn't provide the time in it's data stream, so I have to remember to start out on GPS2 until the time display updates, then I can switch back to GPS1.
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RV-7A - Eggenfellner H6, GRT Sport ES, EIS4000, 300XL, SL30, TT Gemini, PMA6000, AK950L, GT320,
uAvionixEcho ADSB in/out with GRT Safe Fly GPS
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  #16  
Old 08-11-2009, 11:32 AM
ezpilot82ZE ezpilot82ZE is offline
 
Join Date: Jun 2007
Location: Santa Clarita, CA
Posts: 18
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Did adding an external gps such as the GPS-18 or Byonics on the #3 port activate/enable the gps nav and moving map functions on the GRT Sport? (PFD/HSI split page, HSI page, ability to manipulate waypoints and flight plans from the GRT EFIS?)

Chris
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  #17  
Old 08-11-2009, 11:40 AM
DGlaeser DGlaeser is offline
 
Join Date: May 2005
Location: Rochester Hills, MI
Posts: 879
Default Yes...

Quote:
Originally Posted by ezpilot82ZE View Post
Did adding an external gps such as the GPS-18 or Byonics on the #3 port activate/enable the gps nav and moving map functions on the GRT Sport? (PFD/HSI split page, HSI page, ability to manipulate waypoints and flight plans from the GRT EFIS?)
Chris
The external GPS is GPS2 and all the features you mention work when it is selected as the nav source. If I want to enter a flight plan, the internal Sport flight plan features are used.
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Rochester Hills, MI
RV-7A - Eggenfellner H6, GRT Sport ES, EIS4000, 300XL, SL30, TT Gemini, PMA6000, AK950L, GT320,
uAvionixEcho ADSB in/out with GRT Safe Fly GPS
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  #18  
Old 08-11-2009, 01:07 PM
ezpilot82ZE ezpilot82ZE is offline
 
Join Date: Jun 2007
Location: Santa Clarita, CA
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Thanks Dennis now I have money burning a hole in my pocket!

Chris
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  #19  
Old 09-01-2009, 12:08 PM
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Fred.Stucklen Fred.Stucklen is offline
 
Join Date: Oct 2006
Location: Brooksville, FL
Posts: 356
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How about using the TruTrack ADI NMEA output at 4800 baud? I already have that in my RV-7A, and would like to utilize it as a secondary GPS in case the GNS480 craps out. I know it's not WASS compliant, but some sort of GPS feed to the GRT is better than none.
How do I set this up on the GRT as a secondary device? Will it automatically switch over to this GPS (GPS2) if GPS1 craps out?

Fred Stucklen
RV-7A N924RV
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  #20  
Old 09-01-2009, 12:34 PM
DGlaeser DGlaeser is offline
 
Join Date: May 2005
Location: Rochester Hills, MI
Posts: 879
Default Easy enouh...

Quote:
Originally Posted by Fred.Stucklen View Post
How about using the TruTrack ADI NMEA output at 4800 baud? I already have that in my RV-7A, and would like to utilize it as a secondary GPS in case the GNS480 craps out. I know it's not WASS compliant, but some sort of GPS feed to the GRT is better than none.
How do I set this up on the GRT as a secondary device? Will it automatically switch over to this GPS (GPS2) if GPS1 craps out?
Fred Stucklen
RV-7A N924RV
Connect the ADI Serial output to a free Serial In port on the GRT and then configure that port appropriately.
The GRT will not automatically switch GPS inputs. If the one you're using isn't sending valid data, you'll get a message on the GRT, but you'll have to switch inputs manually.
To set a route or destination when using the ADI's GPS you'll have to use the GRT internal Flight Plan features.
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RV-7A - Eggenfellner H6, GRT Sport ES, EIS4000, 300XL, SL30, TT Gemini, PMA6000, AK950L, GT320,
uAvionixEcho ADSB in/out with GRT Safe Fly GPS
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