wrote:
Hi friend...
Iam niranjan ...
I need protocal standards on arinc 429...
plz any one help me from where i can get the protocal standards for
Arinc 429

Start with:

http://www.sierrasales.com/pdfs/ARINCTutorial.pdf

That's a good tutorial by Condor Engineering
(http://www.condoreng.com). If you need information about a specific
label, you may need to go to ARINC or RTCA's web site.

Basically 429 is a self-clocking protocol, +/- 10 volts, differential.
Fairly simple, with a few quirks about the rise/fall times.

jmk