Dawn is the leader in VITA 62
compliant power supplies for the
mission critical market. Wide range of
standard features, highly confgurable
through custom frmware.
Rugged, Reliable and
You need it right.
You want Dawn.
Dawn’s PSC-6238 VITA
62 compliant 3U VPX Power
Supply for conduction
cooled systems is designed
to operate in a military
environment over a wide
range of temperatures
at high power levels. Up to
800 Watts available power.
Onboard embedded RuSH™
technology. Switchable Battleshort
and NED functions.
offers sufficient attenuation to penetrate water to undersea systems
at useful depths, while RF systems
require an above water antenna,
Communications through such
an air-water-interface (AWI) have
the potential for very high data
rates and inherently low probability
of intercept and low probability of
detection (LPI/LPD). Navy researchers are looking for technology
tradeoffs between bandwidth, availability, and vulnerability for such an
optical communications payload.
Navy researchers have in mind
an optical communications system
that can communicate at speeds
no slower than 1 kilobit per second between a submersible and
an aircraft at ranges farther than
15 nautical miles through the air,
and to depths greater than 100 feet
through the water.
Of primary interest is an over-the-air and through-the-water optical communications system packaged as a gimbal mounted to the
aircraft or in a pod that measures
no larger than 16. 5 inches long,
15. 5 inches wide, and 13. 25 inches
high, and that weighs no more
than 60 pounds.
Technologies of interest include
compact pulsed lasers operating in
the 450-to-550-nanometer region,
and wide-field-of-view optical filters, communications modems able
to modulate and demodulate optical
signals using pulse position modulation (PPM), and sensitive large-aperture optical detectors.
The modem will use Reed-
Solomon encoding to improve bit
error rate (BER) performance, and
BER or Symbol Error Rate (SER) to
adjust the modem parameters of the
uplink and downlink to make the
most of communications bandwidth
while optimizing BER performance.
Companies interested should
e-mail white papers or questions
to SPAWAR’s Kathleen McCoy at
MORE INFORMATION IS online