IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM - No GPS fix with WAAS antenna type?

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No GPS fix with WAAS antenna type?

Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: http://forums.avidyne.com/forum_posts.asp?TID=1783
Printed Date: 03 May 2024 at 1:29pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com

Topic: No GPS fix with WAAS antenna type?

Posted By: AlexTB20
Subject: No GPS fix with WAAS antenna type?
Date 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?

Replies:

Posted By: AviSteve
Date 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.

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Steve Lindsley
Avidyne Engineering

Posted By: AlexTB20
Date 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.