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

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Audio Alert

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=1167
Printed Date: 27 Apr 2024 at 7:36pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com

Topic: Audio Alert

Posted By: dkit
Subject: Audio Alert
Date Posted: 21 Oct 2016 at 1:40pm

The IFD540 appears to have two audio "alert type" outputs. I currently have Audio 2 (P1001 pins 52,53) connected to an unswitched input on the Audio Panel as shown in the IM Fig. D-24:TAWS Interconnect and it certainly has TAWS as well as chimes prompting action at various points in an approach. But there is also Audio 1 (Alert audio) (P1001 pins 37,38). I do not see any reference to it in any of the Electrical Interface Drawings in the IM. Is that audio output used for anything now or will it be in the future? Any reason to connect Audio 1 to another unswitched audio input on the Audio Panel? Where will the traffic alert audio show up with the AXP340/MLB100 package installed and the 10.2.0.0 software?

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dkit

Replies:

Posted By: oskrypuch
Date Posted: 21 Oct 2016 at 3:35pm

I think the difference is in the electrical characteristics of the output, rather than the "content".

But, good questions.

* Orest

Posted By: DavidBunin
Date Posted: 23 Oct 2016 at 7:29am

Orest is correct. The audio content is the same, the output impedance is different. For my installation, I consulted with both Avidyne and PS Engineering, and based on their guidance I hooked it up the same way you did. Audio 2 from pins 52/53. I am quite happy with the results.

In theory, the Audio 2 signal should produce either a more clear sound, or a more controllable volume. The Audio 1 signal was designed to be no better than (no different from) the brand-G signals that were using those pins.

So it stands to reason that the Avidyne version would be newer/better, but of course I never tried it the other way (mine was a from-nothing IFD installation). All I can say is that I'm happy with Alert 2 audio.

Posted By: dkit
Date Posted: 24 Oct 2016 at 12:35pm

Thanks, Orest and David B.

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dkit