Hitachi SICOLOR DIG K550 Operation Manual page 50

Video output selection
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The camera video output format can be selected for VBS, Y/C, or 2-wire
output(optional unit).
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Refer to the figure and set the video output switches as required.
Note: Factory setting is VBS/GL in.
Be sure the rear panel GL 75Ω switch is OFF except when setting VBS/GL in.
[A]: External sync operation only with VBS/GL in.
[B]: Optional 2-wire output unit is needed.
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