Try
http://www.rst-engr.com/rst/catalog/altitude_encoder_and_elt.html
for a USD 25 test box
and
http://www.rst-engr.com/rst/articles/kpapr98/index.html
for grey codes. There are more comprehensive sites; but others can let you
in on that.
Fast enough response?
Duncan McF.
----- Original Message -----
From: "Tim Houlihan" <Tim@houlihan.flyer.co.uk>
Subject: Europa-List: Mode "c" info required
<Tim@houlihan.flyer.co.uk>
>
> Hi.
>
> I have a Terra AT3000 altitude encoder connected to a Garmin GTX 320
Transponder, during initial flight tests I found that only mode A with no
altitude information was being received .
> Next time I remove the panel I will have to check that I have the wiring
correct. Can anyone advise me of a simple way to ground test this setup off
the aircraft. I plan to produce a test lead with LED's on the data lines to
see if the encoder output code changes as pressure is reduced. Where can I
find any info about the grey code that the encoder sends to the transponder?
I only require codes for for a couple of spot checks between ground and say
10k feet.
>
> This forum provided me with a wiring diagram for the encoder within
minutes so I am confident that someone will reply with a really simple way
of getting these devices to talk to each other.
>
> I also have a vacuum DI that works fine on the test rig , passes every
test BUT preccesses like crazy in the aircraft but thats another story.
>
> Regards
>
> Tim Houlihan
>
> G-BZTH No 10
>
>
>
>
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