This adapter is designed to split the Composite sync so that a workstation that
only has the composite sync signal (no H/V signal) can be connected to a VGA
monitor that only supports the H/V signal.Some older SUN and MAC
workstations have the composite sync and don't provide the H/V signal. This
adapter was designed to allow a VGA monitor work with those
workstations.This adapter would not be necessary for newer SUN and MAC
workstations that provide the H/V signals.