AXP340/322 ADS-B Transponder - configuring for traffic

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configuring for traffic

Printed From: Avidyne
Category: Avidyne General
Forum Name: AXP340/322 ADS-B Transponder
Forum Description: Topics on the Avidyne AXP340/322 ADS-B Transponder
URL: https://avidynelive.com/forum_posts.asp?TID=472
Printed Date: 26 Mar 2026 at 2:13pm
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com

Topic: configuring for traffic

Posted By: ksdoc
Subject: configuring for traffic
Date Posted: 03 Dec 2014 at 12:54pm

I am not receiving traffic on foreflight via stratus 2. What settings on the 340 transponder do I need to set to get the traffic?

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kansasdoc

Replies:

Posted By: oskrypuch
Date Posted: 03 Dec 2014 at 12:56pm

You need to configure the 340 to squawk that you are participating IN (TIS-B) on 978.

* Orest

Posted By: ksdoc
Date Posted: 03 Dec 2014 at 1:38pm

I have that part set for 978 In, and still do have traffic showing up. I thought there might be another step I'm missing. The transponder is displaying the ADS-B, I wonder if it is broadcasting it?

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kansasdoc

Posted By: oskrypuch
Date Posted: 03 Dec 2014 at 1:58pm

Send an email to:

9-AWA-AFS-300-ADSB-AvionicsCheck@faa.gov

With your GPS source & transponder type, and aircraft tailnumber.

You'll get a report back on your ADS-B broadcast, and whether it is correctly configured.

* Orest

Posted By: ksdoc
Date Posted: 04 Dec 2014 at 2:56am

Thanks for the tip.

I sent off a request, and the reply was that it failed:

"Requested report attached. The report indicates that there may be software issues. Make sure latest software versions are installed."

I sent the report to my installer, I hope he can make some sense of it and secure a fix.

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kansasdoc

Posted By: oskrypuch
Date Posted: 04 Dec 2014 at 3:48am

Rog. That should fix it.

Errors in ADS-B installation/setup are pretty common, and likely will be for a while.

* Orest

Posted By: Gary T
Date Posted: 04 Dec 2014 at 5:05am

I have a Clarity ADS-B unit with no optional external antenna offered( good internal antenna/reception?).

However the Stratus 2 unit from Sportys does offer an optional external (short whip w/suction cups)

ADS-B antenna :

Improve ADS-B reception with this suction-cup mounted antenna. The Stratus relies on ground based ADS-B transmitters for data. If you intend to mount the Stratus in a location that obstructs its view of ground based towers, simply plug this antenna into the back of the unit and mount to a window. Includes a 5 ft cable, antenna and 2 suction cups for mounting. This antenna is for ADS-B only. It does not replace or supplement the GPS antenna in the Stratus.

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Gary-T

Posted By: Gary T
Date Posted: 04 Dec 2014 at 5:22am

From IFD540 install manual:
7.5.3 RS-232 Port Configuration (Page 2 of 10)

The RS-232 Configuration Page allows the configuration Inputs and Outputs to match that of the equipment installed in the aircraft. The following selections can be made on the RS-232 Input.

Channel Outputs Selection	Description
Off	No device(s) connected to output of this channel
ADS-B (Avi)	Serial position data to the following units: Trig TT31 (V 3.1 or later) Avidyne AXP340

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Gary-T

Posted By: Gary T
Date Posted: 04 Dec 2014 at 4:06pm

KSDOC,

I assume you have an IFD540? Or some other WAAS GPS (Garmin) that may require

different configuration setup with the AXP340?

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Gary-T

Posted By: ksdoc
Date Posted: 09 Dec 2014 at 6:41am

Avionic shop that did my install had to adjust some of the settings on the 340 and now it's broadcasting the ADS-B out correctly, yeah! So finally have the traffic I wanted on ForeFlight.

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kansasdoc