No GPS fix with WAAS antenna type?

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   I have an issue with my IFD540, that won't get a GPS fix if the antenna type is configured as WAAS. It simply does not aquire a GPS signal. It finds 1, 2 sattellites, after a couple of minutes, and that's all.
If I switch to the 'non WAAS' type in the configuration panel, it immediately fixes on 6,7 sattellites with no issue.

The antenna is a Garmin GA35 WAAS type, the same type I use for my L3 NGT-9000 transponder, that gets a GPS fix on WAAS, at the same location.

Any ideas on how to solve this?

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AlexTB20 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 Apr 2019 Location: Europe Status: Offline Points: 7	Post Options Post Reply Quote AlexTB20 Report Post Thanks(0) Quote Reply Topic: No GPS fix with WAAS antenna type? Posted: 19 Jun 2019 at 6:09am
	I have an issue with my IFD540, that won't get a GPS fix if the antenna type is configured as WAAS. It simply does not aquire a GPS signal. It finds 1, 2 sattellites, after a couple of minutes, and that's all. If I switch to the 'non WAAS' type in the configuration panel, it immediately fixes on 6,7 sattellites with no issue. The antenna is a Garmin GA35 WAAS type, the same type I use for my L3 NGT-9000 transponder, that gets a GPS fix on WAAS, at the same location. Any ideas on how to solve this?

AviSteve Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 12 Feb 2018 Location: Melbourne, FL Status: Offline Points: 2153	Post Options Post Reply Quote AviSteve Report Post Thanks(0) Quote Reply Posted: 24 Jun 2019 at 10:39am
	Sounds like a good question for tech support. Are you using the same antenna for the NGT-9000? They'll need to know that.
	Steve Lindsley Avidyne Engineering

AlexTB20 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 18 Apr 2019 Location: Europe Status: Offline Points: 7	Post Options Post Reply Quote AlexTB20 Report Post Thanks(0) Quote Reply Posted: 01 Jul 2019 at 4:59pm
	After the IFD reported a 'wrong GPS time' and after a couple more reboots, it works now. The tech team wasn't able to explain the behavior. But I am glad it works now.