VITA Standards Organization activity updates

The March VITA Standards Organization (VSO) meeting was held in Salt Lake City, Utah. This update is based on the results of that meeting. Contact VITA if you are interested in participating in any of these working groups. Visit the VITA website ( for details on upcoming VSO meetings.

Accredited as an American National Standards Institute (ANSI) developer and a submitter of Industry Trade Agreements to the IEC, the VSO provides its members with the ability to develop and promote open technology standards. The VSO meets every two months to address embedded bus and board industry standards issues.

VSO study and working group activities

Standards within the VSO may be initiated through the formation of a study group and developed by a working group. A study group requires the sponsorship of one VITA member, and a working group requires sponsorship of at least three VITA members.

Work in progress

Several working groups have current project work underway; the following roundup summarizes those projects.

ANSI/.9: : / Rear I/O Fabric Signal Mapping on 3U and 6U VPX Modules

Objective: This standard defines PMC or XMC mezzanine rear I/O pin mappings to VITA 46.0 plug-in module backplane connectors.

Status: Various updates and additions have been added for anticipated use in VPX profiles. The working group has completed their comment reviews and preparing for ANSI ballot.

ANSI/VITA 47: Environments, Design and Construction, Safety, and Quality for Plug-in Units

Objective: Supplying vendors’ certification of commercial-off-the-shelf (COTS) plug-in units to this standard will facilitate the cost-effective integration of these items into larger systems.

Status: ANSI/VITA 47-2005 (R2007) has been opened for revision to improve interoperability, create less reliance on individual supplier ruggedization guidelines, and make sure environments are concurrent with recent VPX updates. The working group is nearing completion of reviewing comments on the revisions and additions. Participation is encouraged.

.4: VPX REDI: Mechanical Specification Using Liquid Flow Through (LFT) Applied to VPX

Objective: This standard will establish the mechanical design requirements for an LFT-cooled electronic VPX module.

Status: The working group is reviewing comments from the working group. They anticipate submitting the document for ANSI balloting by May.

VITA 48.8: VPX REDI: Mechanical Standard for 3U, 6U Air Flow Through (AFT) Cooling

Objective: This document defines an AFT standard using VPX connectors without the need for retainers and uses jackscrews instead of levers.

Status: ANSI balloting is completed and is scheduled to be published in May.

VITA 49.2: VITA Radio Transport (VRT) Control Packet Rules

Objective: The VRT standard defines a transport-layer protocol designed to promote interoperability between radio frequency receivers and signal-processing equipment in a wide range of applications. The VRT protocol provides a variety of formatting options allowing the transport layer to be optimized for each application. The VITA 49.2 standard specifies the rules governing control packets.

Status: The working group has developed a draft document for review and discussion. Working group balloting is in process. Interested parties are invited to join the working group.

VITA 57.4: +

Objective: The goal of this project is to develop a next-generation specification calling for a new set of connectors to support higher-speed serial interfaces.

Status: The working group ballot has been complete, and comments are under review before the document will be submitted to public ANSI ballot. A new study group has been formed, VITA 57.5 Physical Tools to Aid in FMC+ Development, to define a set of development tools. Interested parties are invited to join this study group.

ANSI/: Architectural Framework for VPX

Objective: The OpenVPX architectural framework specification is a living document that is regularly updated with new profile information and corrections.

Status: The document is in ANSI balloting and expected to be published this spring.

.3: VPX: Coaxial Interconnect, 6U, Four Position SMPM Configuration

Objective: This specification details the configuration and interconnect within the structure of VITA 67.0, enabling a 6U VPX interface containing multi-position blind mate connectors with up to four SMPM contacts.

Status: The working group has been through several rounds of ballots and is close to the ANSI ballot stage.

.2: VPX: Compliance Channel

Objective: This standard defines a VPX compliance channel including common backplane performance criteria required to support multiple fabric types across a range of defined baud rates. This allows backplane developers to design a backplane that supports required Bit Error Rates (BER) for multiple fabric types. This also allows module developers to design plug-in modules that are interoperable with other modules when used with a compliant backplane.

Status: The working group is updating the draft of this standard.


Objective: VNX describes a rugged small form factor subsystem intended to be rugged for deployed environments.

Status: The working group has approved this specification and has submitted for ANSI ballot. Several additional dot specifications have been introduced to expand the capability of VNX. Interested parties are invited to join the working group.

VITA 78.1: SpaceVPX Lite Systems

Objective: This document leverages the work done on ANSI/VITA 78 to create a specification with an emphasis on 3U module implementations. The most significant change from SpaceVPX is to shift the distribution of utility signals from the SpaceUM to the System Controller to allow a radial distribution of supply power to up to eight payload modules.

Status: The working group has developed a draft document of the specification that is currently under review.

VITA 84: Hardware Open System Technology (HOST) Study Group

Objective: This is a study group with the vision of creating a hardware technical reference framework for developing embedded computing systems through successful development of an overarching HOST strategy to maximize platform and system “openness,” modularity, interoperability, scalability, sustainability, and re-use.

Status: The HOST study group is actively reviewing the draft document and reviewing comments

VITA 86: High Voltage Input Sealed Connector Power Supply.

Objective: This standard defines an environmentally enhanced connector pair, which is compatible with the pinouts as defined in .0 for power supplies operating in harsh environments operating off of a high voltage input (270VDC). The connector pair features wider separation between input pins and a sealed connection.

Status: The working group is collecting inputs before developing a draft document.

Copies of all standards reaching ANSI recognition are available from the VITA website. For a more complete list of VITA standards and their status, go to