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Garmin 430/530 and WAAS

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ericparlow(at)hotmail.com
Guest

Posted: Wed Mar 07, 2007 5:12 am Post subject: Garmin 430/530 and WAAS

Has anyone had the 430/530 WAAS conversion done and installed it?



We need to know if there were any modification needed to the plane's wiring 

or antennas.



ERic--

RV-10, 40014

N104EP

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BobsV35B(at)aol.com
Guest

Posted: Wed Mar 07, 2007 6:18 am Post subject: Garmin 430/530 and WAAS

Good Morning Eric,   

 It is almost a certainty that the antenna will need to be replaced and  there is a good possibility that the antenna lead will need to be replaced.  There is a minimum length required and that minimum length is longer than  what has been used for many installations. If your current installations uses  RG-58, it must be replaced regardless of length.

  

 Other than that, no problem at all!

  

 Happy  Skies,



Old Bob

AKA

Bob Siegfried

Ancient Aviator

Stearman  N3977A

Brookeridge Air Park LL22

Downers Grove, IL 60516

630  985-8503



  

 In a message dated 3/7/2007 7:14:30 A.M. Central Standard Time,  ericparlow(at)hotmail.com writes:

  	  Quote: 	
		  Has    anyone had the 430/530 WAAS conversion done and installed it?



We need    to know if there were any modification needed to the plane's wiring 

or    antennas.



ERic--

RV-10,  40014

N104EP



	


 





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Earl_Schroeder(at)juno.co
Guest

Posted: Wed Mar 07, 2007 6:55 am Post subject: Garmin 430/530 and WAAS

Eric Parlow wrote:

 	  Quote: 	
		   Has anyone had the 430/530 WAAS conversion done and installed it?



Here is some info concerning the 'WAAS' discussions:  [thanks to Brent 
	


Regan]  Earl

Wide Area Augmentation System (WAAS) uses a series of strategically 

placed ground stations that receive the GPS signal from the GPS 

constellation, compare the reported position to the known position and 

calculate the difference. This difference between the two is used to 

infer the signal propagation delay through the ionosphere. The 

ionosphere is very dynamic and not very predictable. The delay 

"coefficients" are then transmitted to three (two currently in service) 

specialized WAAS satellites that then transmit the correction data back 

to earth.  (simplified explanation).



"WAAS Compatibility" simply means that the GPS receiver can receive the 

signals from the three WAAS satellites. Most GPS receiver can do this. 

The trick comes in being able to process the WAAS data and use it to 

correct your position information. There is a lot of math involved and 

it must be done in real time so it requires a beefy Digital Signal 

Processor (DSP).



Think of it this way, your telephone is "FAX Compatible" just like most 

GPS receivers are "WAAS Compatible".  You telephone can dial a FAX 

number and receive the pops and screeches but it has no way to process 

the data into a facsimile of a document. 



WAAS Capable GPS receivers (like the FreeFlight) have an internal DSP in 

addition to the receiver to make use of the WAAS data.



Do not confuse "WAAS Compatible" or "WAAS Enabled", the ability to 

receive WAAS data (easy), with "WAAS Capable", the ability to receive 

AND process the WAAS data (hard). 



Caveat Emptor



Regards

Brent Regan

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dsleepy47(at)hotmail.com
Guest

Posted: Wed Mar 07, 2007 10:39 am Post subject: Garmin 430/530 and WAAS

Here is one avionics shops information about the upgrade.

 http://www.lancasteravionics.com/

  

 Deems





   

 > Date: Wed, 7 Mar 2007 08:54:37 -0600

 	  Quote: 	
		   From: Earl_Schroeder(at)juno.com

 To: aeroelectric-list(at)matronics.com

 Subject: Re: AeroElectric-List: Garmin 430/530 and WAAS

 

 --> AeroElectric-List message posted by: Earl_Schroeder <Earl_Schroeder(at)juno.com>

 

 Eric Parlow wrote:

 > Has anyone had the 430/530 WAAS conversion done and installed it?

 >

 Here is some info concerning the 'WAAS' discussions: [thanks to Brent 

 Regan] Earl


	


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romott(at)roadrunner.com
Guest

Posted: Fri Mar 09, 2007 12:02 pm Post subject: Garmin 430/530 and WAAS

I just had my 430 updated yesterday.   Actually, I took it to my avionics shop on February 20.  They sent it to  Garmin who then refurbished my old box with new knobs, screen, new GPS  processor, replaced BNC connectors, and realigned everything.

  

 My shop had to make a new RG-400 cable with 3 db  loss.  That wound up being a 14' cable to reach the new GPS antenna that is  mounted about 10" in front of the 430 rack.  Otherwise, absolutely no  changes to my Velocity's wiring.

  

 I then flew GPS approaches into 3 different  airports, one ILS approach, and engaged the autopilot to make sure all was  working OK.

  

  One word - NICE!

  

 The GPS glide slope is nice and smooth - not  twitchy like an ILS.  The Glide Slope starts working as soon as you turn  inbound at the IAF and works all the way down to the ground.  Once on the  ground, GPS altitude is within 10 feet (that is the resolution of the altitude  readout) of the runway elevation.

  

 It was easy to transition from the legacy  430 to the new 430W. 

  

 This upgrade is HIGHLY  RECOMMENDED!!!!



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