The C.A. Designs OPTO-VID electrically-isolated video amplifier product comprises two modules capable of high quality picture transmission over a category 5 (4-pair) UTP or FTP cable.  This typically allows the transport of PC video signals within electrically noisy environments using twisted-pair cables to remote monitor screens.

Each video link has a line-driving module and a line-receiving module.

The Line-Driving Module:
... transforms the video signal into a format suitably matched to level 5 UTP or FTP cable.  A composite video output is constructed from the incoming video and sync input signals, modified by gating and time delays then amplified to differentially drive a balanced transmission line via an optically-isolated interface.

Compensation for cable length is externally switchable for up to 200 metres (additive to the 100 metre receiver compensation).

Line-Receiving Modules:
... reconstruct the video signal from the transmission line into a compatible output signal for an appropriate monitor:

• TP1A-100 receivers output RGB analogue video
• TP1V-100 receivers output SVGA-type monitor signals with switchable TTL sync polarity (some monitors sense this to set picture size)

Balanced differential input amplifiers reduce unwanted common-mode interference and have adjustable compensation (to improve picture sharpness).

These units may take their power from an external power supply which may be situated at either end of the twisted-pair line.

Interconnecting Cable
The twisted-pair cable used must be Category 5 grade UTP / FTP cable, terminated with RJ45 connectors to the EIA568 standard.  Foil screening is recommended for optimum EMC.

Excellent picture quality is dependent upon cable length and quality.

Maximum cable lengths are determined by the values quoted within product codes,
e.g. OPTOVID-200 + TP1V-100 = 300m maximum.

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