The CSMU mounts in a survivable and accessible area
of the vehicle, up to 100 feet from its data source.
It contains a micro-controller, communication interfaces,
power conditioner, crash survival memory and an externally
mounted acoustic beacon. This highly reliable unit contains
no moving parts or adjustments. It is suitable for circular
loop rewrites as often as every 20 minutes or as long
as 25 hours, for up to 17,000 operating hours. The memory
format handles periodic and aperiodic parameters and
events, with readafter- write and CRC error-detecting
codes. All records are independent and self-documenting
as stored. The unit is also suitable for audio and video
Unit built-in test is performed on power-up or on external
command. BIT status is available on the communication
buses. Downloading can be performed after an incident
or at any time. Card-level and chip-level data extraction
equipment and test equipment are available at L-3 EDI.
The unit is not field-repairable due to its unique construction.
Cooling is by convection.
L-3 EDI, a leader in solid-state recorder technology,
has also produced recorders for the B-1, B-2, F-4, T-45,
F/A - 22 and JAS-39 air vehicles.