The ADC-3250/OPT and DAC-3250/OPT form an encoder / decoder pair for converting an
analogue video, up to 4 channels of audio and an RS-232 data port to a 270 Mb/s
digital signal suitable for transport over ASI/SDI paths.
This allows
analogue signals to be passed through purely digital environments such as
digital optical links and digital routers and switchers thus simplifying
installations that are predominantly digital where some analogue signals still
exist.
When used with IRT's fibre mux/demux system, both analogue and
digital signals can be sent over the same link.
The ADC-3250/OPT encodes the
analogue input signals to a 270 Mb/s digital stream. The inputs can either be a
single video, up to 4 channels of audio or a combination of video and audio.
There is also an RS-232 data input port, which can be used concurrently with the
video and audio or by itself. The DAC-3250/OPT decodes the 270 Mb/s digital stream
to recover the original signals. |
Front panel LED indicators on both units indicate the presence of the analogue
and data input signals. The ADC-3250/OPT allows cable equalisation of various
lengths by a front panel control. A front panel monitor output aids in setting
this correctly.
Plug-in fibre optic boards are included on
both the ADC-3250/OPT and DAC-3250/OPT for direct connection to a single mode fibre.
The 270 Mb/s digital signal is of the same data rate as ASI and SDI
signals hence its ability to be sent over ASI/SDI paths. Although similar in
structure to both ASI and SDI it is neither of these types of signals. Hence the
ADC-3250/OPT and DAC-3250/OPT are designed to act as an encoder / decoder
pair.
Both the ADC-3250/OPT and DAC-3250/OPT are manufactured on extended
Eurocard boards and are suitable for mounting in IRT's 1RU and 3RU Eurocard
frames with other analogue or digital modules. |
