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KLX-135A NMEA output

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peter(at)sportingaero.com
Guest

Posted: Sun Jul 01, 2012 1:03 am Post subject: KLX-135A NMEA output

Guys,



I have an old KLX-135A that works fine, I'm trying to hook it up to an 

AFS EFIS I have just installed. THE KLX manual implies it outputs to a 

NMEA stream, "The RS232 output is designed to interface with certain 

ARTEX ELTs and certain Moving Map dispalys", but does not give any more 

details.



Does anyone know the output format from a KLX-135A, such as baud rate?



Regards, Peter

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nuckolls.bob(at)aeroelect
Guest

Posted: Sun Jul 01, 2012 6:34 am Post subject: KLX-135A NMEA output

At 04:01 AM 7/1/2012, you wrote:


<peter(at)sportingaero.com>



Guys,



I have an old KLX-135A that works fine, I'm trying to hook it up to 

an AFS EFIS I have just installed. THE KLX manual implies it outputs 

to a NMEA stream, "The RS232 output is designed to interface with 

certain ARTEX ELTs and certain Moving Map dispalys", but does not 

give any more details.



Does anyone know the output format from a KLX-135A, such as baud rate?



Regards, Peter



    NMEA-183 is the marine counterpart to aviation's

    ARINC-425. These conventions describe a family of

    communications protocols that cover a wide range

    of applications for having electro-whizzies talk

    and listen to each other on a common 'party line'

    bus.



    There's a compendium of NMEA-183 articles and

    documents that will probably offer a whole lot

    more than you ever wanted to know about NMEA-183 . . .



http://tinyurl.com/6pzlp8n



    The short answer is that the prevalent convention

    for GPS (and at one time, LORAN) receivers to

    speak to things like EFIS, autopilots, moving maps

    and the like is contained in one or two standard

    'sentences' out of many described in the above

    documents. As a 'talker', your GPS receiver will,

    when queried, spit out a digital sentence that begins

    with the characters $GP followed by an identifier

    and a string of data consistent with that identifier.



    The standard baud rate is 4800 using 8-bit protocols

    consistent with many other communications conventions

    like RS232, RS422, etc. etc.



    As a general rule, all aviation specific GPS receivers

    will output one or two of the sentences as talkers

    which all aviation specific listeners will watch for,

    capture and parse out accordingly. Does your EFIS have

    a setup screen that asks questions about your GPS data

    source? If so, what are the questions?



   Bob . . .

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nuckolls.bob(at)aeroelect
Guest

Posted: Sun Jul 01, 2012 6:36 am Post subject: KLX-135A NMEA output

 	  Quote: 	
		  

 Does anyone know the output format from a KLX-135A, such as baud rate?

 	


  here's some more data you may find

  sufficiently informative to your

  task:



  http://tinyurl.com/6vkrt85



 

 

   Bob . . .    [quote][b]

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