– 17 –Controls and their functions@@@@@ SD REF IN connectors and 75-ohm termination switchThese are the input connectors for the SD reference video signals.Input the NTSC signals with color burst.To terminate, set the switch to ON.AAAAA HD REF IN connectors and 75-ohm termination switchThis is the input connectors for the HD reference video signals.Input tri-level sync signals with positive and negative polarities.To terminate, set the switch to ON.BBBBB HD REF OUT connectorThis is the output connector for the HD reference video signals used for externalsynchronization.It outputs tri-level sync signals with positive and negative polarities.The field frequency is synchronized with the input signals. (If no signals are input, thefrequency follows the menu setting.)CCCCC SD REF OUT connectorThis is the output connector for the NTSC external synchronization signal (black burstsignal).D DIGITAL AUDIO IN/OUT connectorThis I/O connector is for digital audio signals which comply with the AES/EBU standard.E Remote control connectorsThe unit can be controlled from an external source by connecting the unit with another unitor an external controller.There are two remote control connectors, one for IN/OUT uses and the other for OUTuses.IN/OUT: For connection with an external controller.For connection with deck-to-deck operation.OUT: For connection with parallel running operations.For use in a loop-through configuration.F ENCODER REMOTE connectorThe external encoder/controller is hooked up to this connector when the video outputsignal and other settings are to be adjusted from an external source.G RS-232C connectorH PARALLEL REMOTE connectorThis is used when operating the unit from an external source.