13 - Rear panel & connections—Other connections13–4This stereo signal may be routed to any combinationof the following: input channels 5-6, input channels13-14 and ST-IN 1, using the I/O SETUPscreen accessed through the DIGITAL I/O key (see3.1, “I/O setup”).Regardless of the channel assignment, the signalreceived here may always be selected for monitoringusing the D-IN 1 key of the monitor select keys [22].Using the DIGITAL I/O screens, this mayalso be used as a clock source.13.5Other connections[75] POWER switchTurns the TM-D4000 on and off.WARNINGSAlways make sure that the TM-D4000 isturned off when connecting or disconnectingequipment.Always make sure that the voltage of yourpower supply corresponds to the voltagerequirements of the TM-D4000, as specifiedon the rear panel by this switch.[76] WORD SYNC OUT connectorThis BNC connector provides a word clock signalgenerated from the TM-D4000, for use if the TM-D4000 is to be used as the word clock master in thesystem.This connector is unbalanced, and outputs the clockat TTL levels. It is auto-terminating.[77] WORD SYNC IN connector andswitchThis BNC connector accepts a word clock from anexternal source. On the DIGITAL I/OCLOCK screen, as described in 3.2, “CLOCKsetup”, this is referred to as WORD.Set the 75ohms terminator switch to ON in almostevery case. However, if a “daisy-chain” type of wordclock connection, using BNC T connectors isemployed (this is not a recommended method ofworking, by the way), this switch should be set to theOFF position. WARNINGThere should be one, and only one, wordclock master unit in a system. If more thanone word clock master is present in a system,there is a risk of damage being caused tomonitor speakers, etc.The connector is unbalanced, and accepts the clocksignals at TTL levels.[78] CASCADE IN and CASCADE OUTThese 25-pin ’D’-sub connectors are used to providecascade connections between the TM-D4000 andanother TM-D4000.When making cascade connections, CASCADE INconnectors must be connected to CASCADE OUTconnectors. CASCADE INs should never be con-nected to other CASCADE INs, and CASCADEOUTs should never be connected to CASCADEOUTs.For full details of cascade operations, refer to the sec-tion on “Cascade”.[79] TO METERThis 37-pin ’D’-sub connector is used to make theconnection between the optional MU-4000 meterbridge unit and the TM-D4000.[80] RS-422This 9-pin ’D’-sub connector is used for connectingto the control inputs of remote devices which use theSony P2 or other “9-pin” control protocols supportedby the TM-D4000.[81] TO HOSTThis 9-pin ’D’-sub connector is used for making aserial connection (RS-422) to the computer runningthe automation software to control the TM-D4000.[82] MIDI IN, OUT and THRUThese three 5-pin DIN connectors correspond to theMIDI standard (MIDI IN receives MIDI data, MIDIOUT outputs MIDI data originated by the TM-D4000, and MIDI THRU echoes data received at MIDIIN).The MIDI is used for MIDI Timecode, ProgramChange and Control Change messages, as well as forMIDI System Exclusive bulk data dumps, etc. Thedetails of these are all given in the section on MIDI.[83] TC INThis RCA connector provides a way for the TM-D4000 to accept linear timecode as an unbalancedsignal.The input impedance of this connector is 20 kΩ, andthe input level is –30 dBV.