Tascam MMR-8 owner manual MIC Calibration Procedure, Input Converter Board Output Converter Board

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MIC Calibration Procedure

Follow this step-by-step procedure to calibrate the MMR-8 Input Converters (MIC).

1.Get out of the Reference Tone mode by pressing the SETUP key. Go to menu 530. Press TRIM and use the Wheel to select the Off menu selection. Press STO to turn off the tone. Press the STOP switch. Press CLR to exit Setup mode.

2.Press INPUT and turn on all channels for monitor input by pressing SEL on each track (all eight Input LEDs should be turned on).

3.Connect a cable from the audio analyzer output to MMR Input connector, channel 1, at the rear of the unit. Set the audio analyzer output to be a sine wave with a level of +4 dBu. Also connect the audio analyzer input to MMR Output channel 1. (The next step assumes the user wants a unity system gain with an input clip level of +24 dBu. The full scale (CLIP) adjustment range is from +9 dBu to

+25 dBu. )

4.While monitoring the channel 1 output level, adjust the Input board channel 1 trimpot for an output level reading of +4 dBu (+/-.05 dB). This equals 1.228 Vrms (+/-.025 Vrms) measured at XLR pin 2(+) and 3(-) pins.

5.Move the audio analyzer output and input to the next channel. Repeat step 4 for each channel

6.Turn off the power. Replace the top cover on the MMR. Remove the calibration cables.

End of the analog input level calibration procedure.

Input Converter Board

 

Output Converter Board

 

 

 

Figure 6-1: Analog Converter cards location within the MMR-8 chassis (top view).

MMR-8

Tascam MMR-8 Owner’s Manual • Chapter 6 • Maintenance and Service

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Contents MMR-8 HAZARD, do not Expose this Appliance to Rain or Moisture Teac Corporation Important Safety Instructions Page Page Page Page Page MMR-8 MMR-8 ChapterMMR-8 Operation MMR-8 System Applications 105 MMR-8 Introduction General InformationHardware Overview Page Functional Overview Page State LCD Window Display Comment Normal SetupError BackupSystem Specifications Page MMR-8 Materials Kit Box InstallationMounting Rack Ears General GuidelinesMultiple MMR-8 Rack Installation Installing Multiple MMR UnitsAC Mains and Grounding Earthing Considerations Audio CablesMMR-8 Back Panel MMR-8 Back Panel ConnectionsMonitoring Connections Audio ConnectionsAnalog In/Out Connections Digital In/Out ConnectionsVitc Timecode and Video Reference SignalsVideo In/Out SMPTE/EBU Time Code In/OutAES/EBU Sample Rate Biphase ConnectionsDigital Audio Sample Reference Connections Word ClockMMR Sync Bus Connections Midi ConnectionsExternal Controllers & Bus Connections Lynx Bus / KCU ConnectionParallel Transport Connecting External Scsi MediaSerial Transport Connection Serial Editor ConnectionTascam MM-RC Remote Controllers for the Tascam MMR-8Verifying MMR-8 Installation Powering Up the SystemSoftware Updates Testing Your Installation Factory Default SettingsMMR-8 Tascam MMR-8 User’s Guide MMR-8 Operation MMR-8 Keys & Definitions MMR-8 OperationMMR-8 MMR-8 Front Panel Page LED Indicators Front Panel Indicators, Switches, and DisplaysMachine Status LEDs Normal State Display Liquid Crystal Display LCDView Track State Display Setup State DisplayLoad Track State Display Slip Track State DisplayError State Display Backup State DisplayVerify State Display Transport Group Front Panel Key GroupsMount Arrow Setup and Wheel GroupSubf SHIFT+TRIM SHIFT+UPTC/FEET TrimTrack Group WheelSelect SELSHIFT+SEL Overwrites existing material on track Clipboard contentsInsert Edit To Clipboard w/offset Input MONDelete Shift + LoadSlip TrackNumeric Keys Keypad GroupSHIFT+2 OffsetSHIFT+1 ReaderCapt CLRMMR-8 MMR-8 MMR-8 Loading and Mounting Drives Basic OperationTRK Loading a Project, Session, or CompositionLoading Individual Tracks Loads into any Selected Track IndexDeleting Tracks from the Disk Recording a New ProjectViewing Tracks Unloading TracksRecalling Registers Using RegistersCapturing the Current Time Code Trimming Time Code Values Using the Entry RegisterLocal & Studio Monitoring Headphone Volume LevelHeadphone Jack Phones Setup State & the Setup Menus MMR-8 Setup MenusSetup Operation Menu # Menu Name Parameters Setup Menu ChartMenu # Menu Name Parameters Menu # Menu Name Parameters Menu # Menu Name Parameters Control Mode Setup Menu DetailsSerial Transport User SettingsHead/Tail Lynx BusTransport Control Track Record Arm/SelectUndo/Redo Prev/NextClear/Paste Non-Destructive Record ModeAuto Cleanup Tape ModeMMR Bus Film Post Production MMR-8 System ApplicationsMMR-8 As Master Biphase Setup MenusPage MMR-8 Film Connections Video Post ProductionMMR Input and Output Level Calibrations System Input Level Calibration Using the Meter LEDsMOC Calibration Procedure Input Converter Board Output Converter Board MIC Calibration ProcedureAdding External Drives to the System Using Removable MediaFormatting Disks Tascam MMR-8 System SoftwarePage Arrow Appendix a Control Panel Command SummarySetup and Wheel Group Transport GroupKeypad keys Page SHIFT+SEL EDIT+SELMON+SEL INPUT+SELSeagate Nikon MO Drive BelugaUnknown Sony MO DriveTascam MMR-8 Approved Drives SET NFREMOVEID=4 Appendix C WaveFrame CompatibilityPage Appendix D MMR-8 Cable Information Parallel Tracks and Parallel Transport ConnectorLynx Remote Controller Connector pinout Midi IN/THRU/OUT Connector pinoutEditor Connector pinout Transport Sony 9-pin Connector pinout Biph Biphase Connectors pinout Analog Input & Output Connectors pinoutsSync MMR-Bus Connector pinout DIO AES/EBU Digital Audio Connector pinoutWord Clock OUT Connector Timecode in ConnectorTimecode OUT Connector Word Clock in ConnectorScsi Connector Vitc in ConnectorPRX Connector 104 Appendix E MMR-8 Glossary KCU Control TrackMidi LCDLED LTCAbbreviations Smpte ScsiTerms BIT REC LED Index112 113 114 115 116 117
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