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  #1  
Old 08-20-2018, 09:27 AM
Mark Dickens's Avatar
Mark Dickens Mark Dickens is offline
 
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Location: Collierville, TN (KFYE)
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Default Need APRS Guru Help

I have a Byonics RTG-FA permanently installed. It gets GPS from the Skyview over a 9600 baud serial connection and I get a steady green LED almost immediately on power up (after the Skyview is powered up of course), so I assume the GPS coordinates are legit. I'm transmitting the NMEA Basic information to the RTG. I configured the unit per Sam's sticky post with the exception of using 9600 baud. I have smart beaconing turned on. Mic-e is also turned on. The antenna is a Laird Phantom Elite ETRA 1440 mounted onto one of my inspection plates under the right wing connected via a RG-174 coax terminated with a NMO connection.

So, out of all the times I had it on this weekend, and this includes a Pilots N Paws mission flying as high as 9000 ft (on the return leg without the dogs of course), I got nothing recorded on aprs.fi. I did get one beacon on Saturday, but that's it.

I have not yet tested the coax and antenna, and I will. I have an antenna analyzer, but I was wondering if there was anything in the configuration I should check or if there was any way to see if it was transmitting with bad data.

Yes, I'm a ham (K0MDD), but I have the tracker set up with N678MT as the call sign.

Any ideas other than just checking the antenna and coax?
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  #2  
Old 08-20-2018, 11:10 AM
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rleffler rleffler is offline
 
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I've had similar symptoms twice. One was a physical wiring issue and the other one was a dead gps puck.
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  #3  
Old 08-20-2018, 11:53 AM
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gnuse gnuse is offline
 
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Have you checked with Allen -- Byonics? I have always had great help from him.
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  #4  
Old 08-20-2018, 01:17 PM
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Assuming the “green LED” refers to the tracker, I’d start right where you already suspected - by test the antenna and output of the tracker.
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  #5  
Old 08-20-2018, 02:13 PM
Mark Dickens's Avatar
Mark Dickens Mark Dickens is offline
 
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Quote:
Originally Posted by humptybump View Post
Assuming the “green LED” refers to the tracker, I’d start right where you already suspected - by test the antenna and output of the tracker.
The tracker is new so hopefully it's putting out rated power. I'll check the antenna and cable
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  #6  
Old 08-20-2018, 02:30 PM
Bevan Bevan is offline
 
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Check the power input cord and secure it in such a way that the plug is held in tight. It may vibrate out. Ask me how I know.

Bevan
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