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Transponders

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djones(at)northboone.net
Guest

Posted: Wed Sep 13, 2006 5:11 pm Post subject: Transponders

In a transponder what is considered suppression out and remote ground when used in the wire harness.  

   

Dennis  

        [quote][b]

wgill10(at)comcast.net
Guest

Posted: Wed Sep 13, 2006 6:20 pm Post subject: Transponders

Hello Dennis,  

   

What brand of transponder are you dealing with?  

   

Bill  

   

--

djones(at)northboone.net
Guest

Posted: Wed Sep 13, 2006 6:44 pm Post subject: Transponders

Terra TRT 250D  

         

  

From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of William Gill

 Sent: Wednesday, September 13, 2006 9:20 PM

 To: aeroelectric-list(at)matronics.com

 Subject: RE: AeroElectric-List: Transponders  

  

   

Hello Dennis,  

   

What brand of transponder are you dealing with?  

   

Bill  

   

--

brian-av(at)lloyd.com
Guest

Posted: Thu Sep 14, 2006 5:09 am Post subject: Transponders

On Sep 13, 2006, at 6:03 PM, Dennis Jones wrote:



 	  Quote: 	
		   In a transponder what is considered suppression out and remote  

 ground when used in the wire harness.


	


The suppression pin there there to effectively mute the reply from  

your transponder when the signal comes from your DME.



The DME is at a frequency very near to that of the transponder. When  

the DME transmitter sends out a couple hundred watt pulse the  

transponder's receiver is overloaded. It may generate a reply. To get  

around this problem the DME puts a pulse on the suppression line when  

it is getting ready to transmit. This inhibits the transponder from  

responding and sending out a bogus reply.



If you have a DME you should connect its suppression output to the  

suppression input of the transponder. No DME? No worry.



Brian Lloyd                         361 Catterline Way

brian HYPHEN av AT lloyd DOT com    Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

— Antoine de Saint-Exupéry

Bill Denton

Joined: 10 Jan 2006
Posts: 97
Location: Chicago, IL USA

Posted: Thu Sep 14, 2006 5:52 am Post subject: Transponders

It's also used in instances where you have two (or more!) transponders in an

aircraft...





--

fvalarm(at)rapidnet.net
Guest

Posted: Thu Sep 14, 2006 8:29 am Post subject: Transponders

Yes,



Why would you want two (or more) transponders in an your aircraft?  



Bevan

RV7A Finishing kit 



--

oldbob(at)BeechOwners.com
Guest

Posted: Thu Sep 14, 2006 8:42 am Post subject: Transponders

Good Morning Bevan,



For the same reason many aircraft have two VORs or two

GPSs. 



Redundancy. 



Most air carrier, and many corporate aircraft, have

dual transponders. 



If I were based in an area such as the SFO bay area, I

would also consider having two installed.  Without a

transponder in such an area, even VFR flight is

difficult.



Happy Skies,



Old Bob



--- B Tomm <fvalarm(at)rapidnet.net> wrote:



 	  Quote: 	
		   

 <fvalarm(at)rapidnet.net>

 

 Yes,

 

 Why would you want two (or more) transponders in an

 your aircraft?  

 

 Bevan

 RV7A Finishing kit

frank.hinde(at)hp.com
Guest

Posted: Thu Sep 14, 2006 8:49 am Post subject: Transponders

In case the pilot forgets to switch one of them on!....



Frank

Definatly do not archive 



Why would you want two (or more) transponders in an your aircraft?  



Bevan

RV7A Finishing kit

Bill Denton

Joined: 10 Jan 2006
Posts: 97
Location: Chicago, IL USA

Posted: Thu Sep 14, 2006 10:47 am Post subject: Transponders

Dunno, but Piper offers them in their "big" aircraft, and I think they may

be used in the turboprop world...





--

Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Thu Sep 14, 2006 11:03 am Post subject: Transponders

So that when you are in the middle of the DC ADIZ and one quits  

squawking you don't get interecpted by F-16s.



 	  Quote: 	
		   



 Yes,



 Why would you want two (or more) transponders in an your aircraft?



 Bevan

 RV7A Finishing kit

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

fvalarm(at)rapidnet.net
Guest

Posted: Thu Sep 14, 2006 11:42 am Post subject: Transponders

I guess it depends on where you fly.  Where I fly, transponders are

mandatory but quite often ATC tells us they can't "see" it.  We tell them

it's still turned on and they clear us to where we want to go anyway.  It

makes me think its mandatory to have but intermittent operation is OK.

Incidentally the transponders check out fine in the shop.  The general

consensus is that Act's system is unreliable due to various factors.



Bevan  



Do not archive



--

djones(at)northboone.net
Guest

Posted: Thu Sep 14, 2006 12:58 pm Post subject: Transponders

Thank you Brian

What is the remote ground used for?

Quoting Brian Lloyd <brian-av(at)lloyd.com>:

 	  Quote: 	

 On Sep 13, 2006, at 6:03 PM, Dennis Jones wrote:

> In a transponder what is considered suppression out and remote  

> ground when used in the wire harness.

 The suppression pin there there to effectively mute the reply from  

 your transponder when the signal comes from your DME.

 The DME is at a frequency very near to that of the transponder. When  

 the DME transmitter sends out a couple hundred watt pulse the  

 transponder's receiver is overloaded. It may generate a reply. To get 

  around this problem the DME puts a pulse on the suppression line 

 when  it is getting ready to transmit. This inhibits the transponder 

 from  responding and sending out a bogus reply.

 If you have a DME you should connect its suppression output to the  

 suppression input of the transponder. No DME? No worry.

 Brian Lloyd                         361 Catterline Way

 brian HYPHEN av AT lloyd DOT com    Folsom, CA 95630

 +1.916.367.2131 (voice)             +1.270.912.0788 (fax)

 I fly because it releases my mind from the tyranny of petty things . . .

 — Antoine de Saint-Exupéry

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