CCTV
TRANSMISSION TECHNOLOGY FOR SPACE SHUTTLE
SUPPORTS
LOW-COST SECURITY INSTALLTION
The
VTTi passive CCTV video adapter range reduces the
time and cost of installing CCTV and other communications
networks and is used in the Space Shuttle programme. VTTi converts video data signals for transmission through a UTP
(Unshielded Twisted Pair), such as a standard telephone
cable, rather than conventional, and more expensive
coax cabling. AVE
Multiview now has launched VTTi in Europe, following
its acquisition of manufacturer Visions Televideo
Technologies Inc in the USA.
The
VTTi’s IC201 video adaptor chip has been approved
for use by NASA, and is specified in the Space Shuttle
programme, to transmit video from cameras located
in the pay-load bay and remote-arm areas of each
vehicle. The
chip, which meets ISO-9001 and US military specifications,
was selected because of the high quality of the transmitted
images. Its
use enables the shuttle designers to replace coax
with much lighter UTP and reduce pay-load weight.
VTTi
products are passive, requiring no external power
supply, and each installation features two units,
to send and then receive the signal over distances
from 800 ft up to 3,000 ft, for the top of the range
VTT5000. They
allow transmission of colour and black & white
images, as well as pan, tilt and zoom signals and
sound.
Installers
can often utilise existing UTP telephone cabling
in buildings, and the system offers excellent noise
immunity, according to AVE Multiview director Mark
Bradley. Signals from all common video sources – such
as NTSC, SECAM and PAL - will travel effectively
over UTP.
