16Parts and their functions (continued)IEEE1394 digital input/output connectorThis unit is capable of input and output through a digitalinterface conforming to the IEEE1394 standard. Use 6-pin connectors. Does not support bus power.Reference signalsDuring tape playback, the video output reference signals are as shown in the table below.*1 If “1394” or “INT SG (internal standard signal)” is selected for the video input signal, the video output reference signal will always be“Internal HD.”z When “E-AUTO” is selected in menu No. 031 OUT REF, the unit operates as if “INPUT” is selected in edit mode or “AUTO”is selected in modes other than the edit mode.z When using the SD > HD up-converter and HD > HD cross-converter, input the HD tri-level sync signal that supports theHD output format in order to initiate operation using HD_REF_IN.z In the 25 Hz (HD) or 50 Hz (HD) mode, black signals are output from the SD SDI output and analog composite outputconnectors.z In the 25 Hz (SD) or 50 Hz (SD) mode, black signals are output from the HD SDI output and analog component outputconnectors.z All the HD SDI output, SD SDI output, video output, analog component output, audio output and TC output signals areoutput in phase with the REF input.In the 59.94 Hz/60 Hz or 50 Hz modeInput signals Menu item No.031REF_IN INPUT AUTO HD_REF SD_REF INPUT* 1HD_REF_IN Input HD_REF_IN HD_REF_IN Internal SD INPUTNot input HD_REF_IN HD_REF_IN Internal SD Internal HDSD_REF_IN Input SD_REF_IN Internal HD SD_REF_IN INPUTNot input SD_REF_IN Internal HD SD_REF_IN Internal SDNone Input INPUT Internal HD Internal SD INPUTNot input Internal HD Internal HD Internal SD Internal HDIn the 23.98 Hz/24 Hz modeInput signalsREF_INHD_REF_IN HD_REF_INNone Internal HDIn the 25 Hz (HD), 25 Hz (SD), 50 Hz (HD) or 50 Hz (SD) modeInput signals Menu item No.031REF_IN AUTO HD_REF SD_REF INPUTHD_REF_IN HD_REF_IN HD_REF_IN Internal SD Internal HDSD_REF_IN SD_REF_IN Internal HD SD_REF_IN Internal HDNone Internal HD Internal HD Internal SD Internal HDInternal HD:With HD tape playback as the reference, operation uses a 74 MHz clock signal in the free-run mode.Internal SD:With SD tape playback as the reference, operation uses a 4fsc clock signal in the free-run mode.