IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM

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IFD XP Trainer Issues

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=2457
Printed Date: 11 May 2024 at 6:35pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com

Topic: IFD XP Trainer Issues

Posted By: jwalton49
Subject: IFD XP Trainer Issues
Date Posted: 02 Jan 2023 at 12:55pm

I have been trying to characterize the issues with using the XP trainer flying ILS approaches in xPlane.

I believe this is related to the ILS issue that Ricardo documented here. here: http://avidynelive.com/workaround-for-ifd-xp-trainer-ap-bug_topic2444.html

This seems to only occur if you activate an ILS approach while in GPS mode. and then switch the nav source to NAV.

I have identified that the trainer is sending erroneous CDI errors (number of dots off) to the instruments. Using a network analyzer I have discovered that the trainer is sending these two xrefs with the wrong values.

sim/cockpit/radios/nav1_hdef_dot

sim/cockpit/radios/nav1_vdef_dot

xPlane tries to correct them which causes the needles to fight as shown in the video linked here: https://drive.google.com/file/d/1PPTHkWlv2ilY0QhXWoUGoLz73dnVuXZy/view?usp=sharing

At the end of the video when the needles calm down it is because I killed the Avidyne app on the iPad.

If the approach is activated while nav source is selected to NAV this issue does not occur.

Replies:

Posted By: vancinad
Date Posted: 15 Feb 2023 at 2:31pm

What network analyzer are you using? I have been interested in doing some of this investigation myself but haven't found a suitable tool. (Where "suitable" includes "very inexpensive"!)

Posted By: ricardo
Date Posted: 15 Feb 2023 at 3:30pm

i used WireShark

Posted By: jwalton49
Date Posted: 15 Feb 2023 at 8:37pm

https://www.wireshark.org/ for me as well.