PPRuNe Forums - View Single Post - ARINC 429 & 1553... what's the difference?
Old 14th Dec 2009, 14:39
  #2 (permalink)  
Graybeard
 
Join Date: Nov 2006
Location: SoCalif
Posts: 896
Likes: 0
Received 0 Likes on 0 Posts
A good example of both is in the Arinc 429 Wx radar.

The control bus - from the Control - sends mode, tilt, range, etc., to the transceiver on a 32-bit low speed Arinc 429 bus. 11KHz, IIRC.

The data bus out of the transceiver to the Displays, is a 1 MHz Arinc 1553 data bus. It repeats mode, tilt, range, etc., in the first 64 bits, then follows with 1500+ bits of azimuth/range bin data. The bits represent rainfall rate, doppler, etc. It's up to the display to determine the color to represent the contents of the azimuth/range bins.

I've never dicked with Mil 1553, but believe it is essentially the same as Arinc 1553.

GB
Graybeard is offline