ARINC 708 Video Distribution Units

Easy · Effective · Reliable

Drive Four Control/Display Units With This Easy-to-Deploy Solution

Ballard Logo

The Ballard AB2-VDU Video Distribution Unit (VDU) is an ARINC 708 databus repeater. It enables up to four (4) radar Control/Display Units (CDUs) to be driven by a single display databus. The VDU solves the databus loading problem that occurs when more than one CDU is connected to the ARINC 708 databus.

The AB2-VDU is easy and straight-forward to deploy. Just install the hardware device; there is no software to load or upgrade. The unit operates from 28 volt DC aircraft power. After power is applied, the VDU automatically repeats the incoming ARINC 708 databus signal on the four outputs, distributing it to up to four radar control/display units. 

Rugged and Ready


The AB2-VDU is easily deployed and ready to operate in the most challenging environments. The unit is SWaP (Size, Weight, and Power) optimized in a compact, rugged package for easier integration and longer life.

Highly Validated

  • Commercial and military
  • Fixed wing, helicopter, ground mobile
  • DO-160 Certified
  • Rugged: MIL-STD-810
  • EMC quiet: MIL-STD-461
Ready to get started? Contact Us

AB2-VDU System Diagram


Reliable ARINC 708 Video Distribution

The AB2-VDU Advantage

Databus termination must be carefully considered, especially when adding CDUs to an existing system. A simple weather/terrain radar system has one terminator in the T-R unit and another in the CDU. If a second CDU is added, it can cause an impedance mismatch. In addition, long stubs will distort the signal, resulting in unreliable operation.

The AB2-VDU solves both the loading problem and the stub problem. The input and each of the four outputs can be individually configured as terminated or unterminated to suit the application. This provides an ideal transmission line for each of the databuses—terminated at both ends and no stubs. Plus, if all the outputs are not needed, unused outputs can be disabled to reduce emissions.

Key Features

  • Drives up to 4 displays from a single input
  • Facilitates display integration
  • Solves termination problems
  • Simplifies aircraft system upgrades
  • Rugged and reliable
  • Easy installation

Ordering Information

Select your desired product in the table below. For more information or to request a quote, call +1.425.339.0281 or fill out the form at the bottom of the page.

AB2-VDU and Accessories

Part NumberDescription
11-11020-04AB2-VDU & Vertical Mounting Kit
17019Mating Connectors (J1, J3)
17021Lab Connectivity Kit
17027Lab Connectivity Kit
17023Horizontal Mounting Kit
17024Vertical Mounting Kit

Cables & Accessories

A wide variety of cables and accessories are available to complement these products.
Browse Cables & Accessories

Let's Start the Conversation

For more information or to request a quote, fill out the form below or call us at: +1.425.339.0281

Stay Informed

Astronics AES

12950 Willows Road NE
Kirkland, WA 98034 USA