Alesis ADAT-XT manual Automatic Brake Calibration Procedure

Page 86

Appendix D: Specifications

Er 7

Clean Heads: If this error message is seen, it may indicate that the heads

 

are in need of cleaning. See page 75 for information about cleaning your

 

heads.

Er 8

Sync Lost: Error message 8 normally occurs when the tape reaches the end

 

while formatting or recording. It is caused by the fact that the XT cannot read

 

timing data from the leader. The error is caused by the unit losing sync. If

 

the unit is being run in the slave mode check the sync cable connection. It is

 

recommended that only shielded and grounded cables be used as sync

 

cables.

Er 9

Take-up Reel. This error indicates that the take-up reel didn’t move after

 

PLAY or RECORD was engaged. This can spool tape out of the cassette, so

 

the XT stops the tape immediately. It’s possible that the take up reel of the

 

tape is jammed; try a blank or unimportant tape to see if the error recurs.

 

The idler wheel that turns the take-up reel may need cleaning or

 

replacement.

no 9ood tc

No Time Code. The XT is reading control track pulses, but no helical scan

 

time code. Usually, a video tape has been inserted into the XT. Format the

 

tape in the ADAT format.

 

(Error 10 through 13 and 16 are not used)

Error 14-15

Crossfade buffer, state or channel error. This indicates a problem with the

 

RAM buffer used for crossfading. Reinitialize the XT using the procedure on

 

p. 75. If the problem recurs, the unit must be serviced.

Error 17

End sensor error. One of the optical sensors used to detect the clear leader

 

at the head and tail of the tape cartridge is not working or is blocked

 

temporarily. If the error recurs on other tapes, the unit needs to be serviced.

CAL PG

This error message may appear when you turn on power to the XT. If the

 

display also reads "CAL brAC", there may be something wrong with the

 

battery backup of RAM, or the RAM was accidentally scrambled. If no other

 

error messages occur during operation, and the Interpolation Indicator (see

 

p. 34) is not flashing, playback and recording are still possible. However, do

 

not format any blank tapes on the XT until the PG is reset .

CAL brAc

If this message appears during the turn-on cycle, the brake settings have

 

been set to the default settings due to a problem with RAM memory or the

 

backup battery. Perform the automatic brake calibration (see below). If this

 

message appears in the midst of normal operation more than once in every

 

ten hours of operation, perform the automatic brake calibration (see

 

"Automatic Brake Calibration Procedure", below).

Automatic Brake Calibration Procedure

If the "CAL brAc" error message appears, the internal braking system of the XT may need to be adjusted. The intelligent transport software is capable of calibrating the XT's brakes automatically in a self-test procedure. This procedure may be performed as a regular maintenance procedure every 250 hours of head drum operation (to see the hours on your unit, hold SET LOCATE and press FAST FORWARD).

1.Obtain a standard ST-126 length tape (preferably an Ampex 489 such as that was shipped with your unit) that has already been completely formatted from beginning to end. Use a non-essential tape (i.e., don't insert your only copy of a master tape). Do not use other lengths of tape such as ST-180 or ST-60.

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ADAT XT Reference Manual

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Contents Alesis ADAT-XT Introduction Adat XT Reference Manual Conventions Adat XT Reference Manual Contents Basic Operations Analog Recording Basics Digital Recording Basics Why S-VHS? Index Maintenance/Service Cleaning Obtaining Repair Service Unpacking and Inspection Setting UPAC Power Hookup ChapterSetting Up About Audio Cables Line Conditioners and ProtectorsBasic Audio Hookup Input NormalingThreaded VS. Unthreaded Word on ADAT’S S-VHS Cassette TapeMounting on a Shelf or NON-RACK Enclosure Operating EnvironmentThermal Considerations in Rack Mounting Avoiding Electromagnetic InterferenceABS 0H 15M 48S POWER-UP,AND Tape InsertionYour First Session ABS n0 F0Formatting a NEW Tape Formatting a Tape a MustSample Rate Selection Recording While FormattingREL 0H 01M 29S Track Selection and Setting LevelsTo record-enable a track Making a RecordingTo make a recording Transport ButtonsRecording Record LED turns off, while the Play LED remains litPlayback To engage Review modeTo engage Cue mode Reviewing and CueingREL 0H 00M 00S LocatingPage Creating a Loop To loop a section of tapeTo automatically punch in and out Automated RecordingRehearsing Measure twice or more, and cut only once70 mS Track DelayABS 00 % 00 C Pitch ControlDisplay Brightness To adjust the display brightnessTrack Copy To bounce audio from one track to anotherAnalog Audio Unbalanced Inputs Input Jack CharacteristicsConnections Analog Audio Unbalanced OutputsAnalog Audio Balanced Inputs and Outputs Additional groundsAnalog Audio Input Mode Input ModeSync IN/OUT To synchronize multiple XTs and/or ADATsDigital Audio IN/OUT To connect the digital optical networkXT Remote FootswitchesRehearse and Auto Record features VersaFormatting Considerations Basic OperationsTape Formatting Complete FormatFormat Extend Be sure the tape is completely rewoundWrite Protect Override ABS Pr 0t 0 FFABS Pr 0t 0 n To extend the format on a partially formatted tapeReading the Display Display Icons Basic Operations Locate 01M 29STime Counter & ABS/REL Button SelectedEntering Numeric Values Basic EditingEdit Value Button Editing Individual DigitsDigital Input Input SelectAnalog Input Track CopyBasic Operations ALL Input Monitor Input MonitorAuto Input Monitor Meters Peak Mode ButtonFine Meter Mode Recording a Benchmark T APERecord Enable Setting LevelsRewind /REVIEW Transport ControlsEject Fast Forward /CUEWhether the tape being played is formatted or not RECORD/PUNCH in or OUTStop To start recordingPositions as before Sample Rate ClockRecord Crossfade Time To select the sample rateTo set the Crossfade Time FA dE 2Displaying Frames VS THS/SECONDS About Pitch Changing To set multiple tracks to the same Track Delay value To turn Track Delay on and offTo set the Track Delay amount 10 mSLocate Autolocation ControlsAbsolute ABS Time VS . Relative Time To store a Locate Point memory on the fly Setting Locate PointsLocating To edit a Locate Point memoryAuto Play Auto LoopingAuto Return Loop LimitLooped Recording Auto RecordTape Length RehearsalErroneously selected, to avoid damage to the tape To set the tape lengthEuropean equivalents and approximate recording times Footswitch Controlled Autolocating Footswitch ControlsFootswitch Controlled Punching Using the XT Remote Synchronizing Machines OperationOverview Master /SLAVE Interaction Achieving LockMaster Format ENABLED, Format Extend Independent Slave ModeMaster Format ENABLED, Complete Format Formatting Multiple TapesBefore punching into format record Master Format DisabledMaster Format DISABLED, Format Extend Bouncing Tracks Between Adats Making Digital BackupsRecording Digital Audio Reassigning Channels to Different TracksTo make a backup tape Recording Digital Audio from Other SourcesTape Offset Digital Clock ConsiderationsSetting the Machine Offset ABS 0H 00M 00SSample Rate VS. Pitch Control Combining XTS and AdatsXT Transport Speed Input MonitoringConnections Here are some possible solutionsPolarity Differences Multiple ADAT-XT Operation Chapter Multiple ADAT-XT Operation Adat XT Reference Manual Applications Combined MULTITRACK/MASTERING DeckLIVE/LONG-TERM Recording Computer Control Midi Machine Control Virtual Remote ControlLocking to Video Code only Master Midi Systems Virtual TrackingLibraries and Archives Modular RecordingUsing Track Copy AS a Digital Router Calculating Tape Offset Using the LocatesPress Edit VALUE, then press Locate Digital Recording Basics Digital Recording ConceptsAnalog Recording Basics Appendix aWHY S-VHS? RE-INITIALIZING TroubleshootingTROUBLE-SHOOTING Index Appendix BABS d1 SP E rr Error Rate DisplayAbout Error Rate Readings ABS d1 SP r E9Adat Head Maintenance Cleaning Tape Maintenance Safe TapeMAINTENANCE/SERVICE Drum Time DisplayRefer ALL Servicing to Alesis MaintenanceObtaining Repair Service Customers in the USAAppendix B Troubleshooting Error Codes Appendix CAutomatic Brake Calibration Procedure Appendix D SpecificationsSteps to Take Before Calling for Help Audio Digital Inputs/Outputs Glossary Or Analog-to-Digital ConverterBus DATMidi MMCOutput SMPTE/LTCVHS VitcIndex Index Adat XT Reference Manual
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