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The DDA-4007 270 Mb/s serial digital video
distribution amplifier provides the user with a single
standard module to cover a wide range of distribution
and monitoring functions for SDI or ASI signals.
The DDA-4007 supersedes the DVA-3007 and
provides all of its predecessor's functions together
with the added option of a Simple Network
Management Protocol (SNMP) monitoring module
for use with IRT's SNMP system frame.
Due to the fact that standard loop through techniques
used in the analogue domain are unsuitable to the
digital domain most digital equipment comes with no
facility to route the input signal to other locations. As
a result a VDA is required at almost every point in
the digital chain.
Serial digital signals also suffer severe deterioration
over relatively short cable distances. The DDA-4007
provides a means of extending the working distances
that can be achieved by equalising.
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Where a large number of reclocked outputs are
required the DDA-4007 may be used to provide
reclocking and its outputs fed to one or more non
reclocking DA's to provide the number of outputs
required.
This provides a more economic solution than using
multiple reclocking DA's and minimises jitter
increase due to unnecessary re-clocking.
An optional rear assembly, ZDA-4006RL (sold
separately), provides a bypass relay to switch the
Input (SK1) to Output 1 (SK2) in the event of a
power failure. When this bypass rear assembly is
used, the number of outputs is reduced to 6.
The DDA-4007 is designed to fit IRT's standard
Eurocard frames as well as IRT's 4000 series frame
for use with IRT's SNMP system and may be used
alongside any other of IRT's analogue or digital
Eurocards.
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