Audio Video Switching Unit

The AVSU-M is our most versatile and
powerful audio-video switching unit to
date. It is built as a modular design with
expandable input and outputs thus saving
vital weight and space.

Technically Advanced - The AVSU-M provides a scalable audio and video routing matrix
in a modular construction ranging from 8 inputs and 4 outputs to a maximum of 16 input
and 16 outputs. The unit is fitted with analogue “video through” ports and a short range,
high speed, multi-channel, digital audio link output to allow cascading of a number of
AVSU-Ms in a system to increase the overall capability.

Each audio input channel has independent digitally controlled gain to allow trimming of
nonstandard signal levels. Flexible Control - As the main hub in our Cabin Management
System the AVSU-M can receive command inputs from either the Soft Switch Panels
Graphical Passenger Control Units or Touchscreens thus eliminating the need for any
particular type of passenger control.

The AVSU-M is controlled by two RS- 485 control busses (Primary and Secondary),
using our International proprietary device interface protocol. PA override Control - A PA
keyline is provided. The presence of a PA signal will cause all audio outputs to mute.
Robust and Reliable - The unit operates from the aircraft 28vdc supply, protected with
an internal fuse and EMC filters to reduce the power line noise. The unit will operate
over the full range of aircraft power fluctuations and incorporates spike protection
circuitry.

Headphone Driver / Audio and Video - inputs and outputs in common with all our
equipment, audio input and output circuits are 600 ohm balanced. 8 to 600 ohm
headphones can be driven with relatively constant power across headphone types.
Video inputs are 1V p-p into 75 ohm and the digital link input/output is differential
100 ohM.