The VP-633/VP634 SDI repeater can each extend the SDI video transmission by a further 100m.
Up-to 4 SDI repeaters can be used in one chain, allowing runs of up to 1000m SDI video thru good quality SDI cable.
Each run must contain a VP-633 as this has a power connection to supply power through the SDI cables which then powers the subsequent VP-634's (which do not require additional power).
For applications where runs of a few hundred meters HD-SDI video are required (concert hall, sports stadium etc.), the Datavideo VP-633 & VP-634 are a very cost effective solution.