AXP340 Transponder Specifications
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: http://forums.avidyne.com/forum_posts.asp?TID=248
Printed Date: 25 Dec 2024 at 2:13pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: AXP340 Transponder Specifications
Posted By: John
Subject: AXP340 Transponder Specifications
Date Posted: 28 Dec 2012 at 5:04pm
I note that the Avidyne Brochure references "elementary" surveillance capability. I contacted "Warren" online yesterday, seeking some understanding, and I was rather put-out at his response. Can you explain what "surveillance" is; how is it distinguished from "interrogation"; and what is the difference between "elementary surveillance" and "enhanced surveillance"? Following these comments, could you compare the Becker remote unit to the AXP340 in terms of capabilities, costs, and ease of use?
Thanx,
John
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Replies:
Posted By: AviJake
Date Posted: 30 Dec 2012 at 9:37am
Hi John,
Sorry about the inadequate response from Tech Support. Let me call in Dean Ryan who knows much more about this than I. He's been off for the holidays and we'll post a more complete answer when he returns.
Here's what I know about the two:
Elementary Surveillance = Mode S
Enhanced Surveillance is a European mandate and was meant for aircraft with a max takeoff gross weight above 5700 kg, with a greater than 250 KTAS cruise speed, operating in EASA territory. I believe those Enhanced Surveillance devices transmit data to include IAS, mag heading, mach number, roll angle, track angle rate, true track angle, ground speed, and selected altitude.
Like I said, let me call in an expert to provide a more complete answer for you.
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Steve Jacobson
sjacobson@avidyne.com
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Posted By: dryan
Date Posted: 07 Jan 2013 at 6:42pm
Surveillance is a generic term used to describe a system or
device that
is used to monitor the location of aircraft. All transponders are
surveillance devices in that they receive interrogations and send data
in response. The term surveillance
(whether elementary or enhanced) does not imply
that a transponder is capable of interrogating other aircraft or
providing traffic data to the pilot.
The term interrogation
is typically used to describe a signal that is transmitted to query the
transponder on board an aircraft. Interrogations are used by the
secondary surveillance radar sites and by some airborne traffic alerting
devices such as TAS and TCAS.
Some transponders are able to
transmit more data than others. For instance, the older style Mode A/C
transponders only send altitude and squawk code, whereas Mode-S
transponders include a unique aircraft ID and potentially many other
additional data elements.
Elementary surveillance means that a
transponder does not support the Mode-S transponder Enhanced
Surveillance (EHS) capabilities. This is a distinction defined
primarily for the European aviation community. A Mode-S transponder
compliant with the enhanced surveillance capabilities will be capable of
transmitting a number of additional data elements such as aircraft
magnetic heading and vertical rate. It should be noted that these extra
capabilities also necessitate that there is a source for that data on
board the aircraft and that the source is connected to the transponder.
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Posted By: John
Date Posted: 07 Jan 2013 at 11:25pm
Thanx for the clear and concise explanation. Could you comment on the comparison I requested between the AXP340 and the remotely mounted Becker (which Avidyne, at one time, promoted to be included as part of one of your systems)? Can foreign made Transponders (Mode "S") handle USA ADS-B? Also, I note that some twins fly with dual Garmin GTX-330's - why would anyone spend the money or waste the panel space? Does it have anything to do with RVSM requirements? Possibly, there is a reliability issue with the Garmin Transponders?
Hopefully, some other pilots out there will benefit from these questions being answered - I have certainly heard numerous conversations with these questions being booted about.
Again, Thank You
John
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Posted By: dryan
Date Posted: 08 Jan 2013 at 11:42am
Can foreign made Mode-S transponders handle USA ADS-B?
Yes; Mode-S transponders are designed and certified using an internationally approved design specification and will operate properly world-wide.
Why do some pilots equip dual transponders?
I believe this is simply for redundancy. A functioning transponder is required equipment for operations in many air spaces; therefore I believe some pilots prefer to have a backup, especially those flying high performance aircraft that will frequent Class A/B/C airspace. I don't believe there is any RVSM requirement for dual transponders, and I am unaware of any reliability issues that have led pilots to equip two transponders.
How does the AXP340 compare with the Becker BXP6402?
There are no significant differences between the AXP340 and the BXP6402 technical specifications; however the Becker BXP6402 does not currently comply with the ADS-B out TSO (TSO-C166b). Obviously the AXP340 is panel mounted versus the remote mounted BXP6402.
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Posted By: TurboPA30
Date Posted: 27 Jan 2013 at 2:33am
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When will there be a remote TXP that the IFD540 can control? That was always a big plus of the CNX80, and Garmin now offers it again on the GTNs. Transponder is really a waste of panel space.
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Posted By: AviJake
Date Posted: 27 Jan 2013 at 9:46am
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Not initially. We have deferred that capability out of the initial release for the IFD540 for time-to-market reasons.
We do agree that the 540 is a great place to do all transponder control and display and free up panel space so we plan to add it back in in a later release.
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Steve Jacobson
sjacobson@avidyne.com
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Posted By: tony
Date Posted: 05 Oct 2014 at 8:25am
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waiting patiently for the announcement.......
soon?
I hope it interfaces to two Avidyne position sources (master and a hot backup) at the same time.
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Posted By: AviJake
Date Posted: 05 Oct 2014 at 8:37am
Yes, soon.
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Steve Jacobson
sjacobson@avidyne.com
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Posted By: TurboPA30
Date Posted: 05 Oct 2014 at 8:47am
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Remote TXP and MLX770 support are the 2 most important pending issues....
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Posted By: tony
Date Posted: 10 Oct 2014 at 6:41am
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Steve
is the MLB100 the announcement you were referring to or is there another one comng? I was hoping for a remote transponder that would interface with the 540 and 440.
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Posted By: AviJake
Date Posted: 10 Oct 2014 at 8:15am
Tony,
The MLB100 announcement is the only one we've made this week. A remote mount transponder that interfaces with the IFD540/440 is a good idea but we have not made any product announcements in that area.
Steve
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Steve Jacobson
sjacobson@avidyne.com
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