ARINC

ARINC

Aeronautical Radio, Incorporated , established in 1929, is a major provider of transport communications and systems engineering solutions for eight industries: aviation, airports, defense, government, healthcare, networks, security, and transportation...

 708 is a specification for airborne pulse Doppler weather radar

Weather radar

Weather radar, also called weather surveillance radar and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, estimate its type . Modern weather radars are mostly pulse-Doppler radars, capable of detecting the motion of rain droplets in addition to the...

 systems primarily found on commercial aircraft

Aircraft

An aircraft is a vehicle that is able to fly by gaining support from the air, or, in general, the atmosphere of a planet. An aircraft counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engines.Although...

. ARINC 708 and the Honeywell

Honeywell

Honeywell International, Inc. is a major conglomerate company that produces a variety of consumer products, engineering services, and aerospace systems for a wide variety of customers, from private consumers to major corporations and governments....

 Picture bus are the predominant avionics data bus for most aircraft today superseding ARINC 453.

Technical Description

ARINC

ARINC

Aeronautical Radio, Incorporated , established in 1929, is a major provider of transport communications and systems engineering solutions for eight industries: aviation, airports, defense, government, healthcare, networks, security, and transportation...

 708 uses a transformer-coupled Manchester encoded

Manchester code

In telecommunication and data storage, Manchester code is a line code in which the encoding of each data bit has at least one transition and occupies the same time...

 signal, like the MIL-STD-1553

MIL-STD-1553

MIL-STD-1553 is a military standard published by the United States Department of Defense that defines the mechanical, electrical, and functional characteristics of a serial data bus. It was originally designed for use with military avionics, but has also become commonly used in spacecraft on-board...

 protocol. Termination of the bus is essential for good signal quality. Furthermore, the bitstream is continuous, requiring good re-synchronization to the bit stream. Data frames are 1600 bits long with the header portion of the frame consisting of parameters such as range, tilt, gain, status, etc. The data portion is organized into 512 range-bins per scan angle value. Each range bin contains a color value to indicate the intensity at that position. Settings for the ARINC 708 system is typically controlled using an ARINC 429

ARINC 429

ARINC 429 is the technical standard for the predominant avionics data bus used on most higher-end commercial and transport aircraft. It defines the physical and electrical interfaces of a two-wire data bus and a data protocol to support an aircraft's avionics local area network.-Messages:ARINC 429...

 interface.

Avionics Weather Radar Systems

Commercial Weather Radar Systems consist of the following items:

• Antenna
• T-R Unit (Transmit-Receive Unit)
• CDU (Control-Display Unit)
• Display

Variations

Variations from the standard specification include variable word length and non-standard amplitude values. Some implementations also require non-standard re-synchronization.

See also

• ARINC 429
  ARINC 429
  ARINC 429 is the technical standard for the predominant avionics data bus used on most higher-end commercial and transport aircraft. It defines the physical and electrical interfaces of a two-wire data bus and a data protocol to support an aircraft's avionics local area network.-Messages:ARINC 429...
  
   protocol used to control radar.
• MIL-STD-1553
  MIL-STD-1553
  MIL-STD-1553 is a military standard published by the United States Department of Defense that defines the mechanical, electrical, and functional characteristics of a serial data bus. It was originally designed for use with military avionics, but has also become commonly used in spacecraft on-board...
  
  protocol is electrically similar to ARINC 708.