Alesis ADAT-XT20 User Manual Page 117
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- TROUBLESHOOTING
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Appendix B: Troubleshooting
116 ADAT-XT20 Reference Manual
CHECKING SOFTWARE VERSION
The current software version may be determined by holding [SET LOCATE]
and pressing [FAST FWD]. The XT20 will momentarily indicate the current
operating software version installed in the TIME counter.
ERROR RATE DISPLAY
The TIME counter has a secondary mode which, when selected, will display
only the minutes and seconds of the tape position, and the error rate while the
transport is engaged in play or record. This error rate is viewed as a count of the
number of sync block errors per 14 drum revolutions (every 280ms). Since there
are 30 sync blocks per sector, 8 sectors per track, and two tracks per revolution,
the maximum number is 6720. If this display mode is selected during any other
mode than play or record, the number will always read “0000”.
To view the error rate display:
1 Hold [SET LOCATE] and press RECORD ENABLE [3].
The TIME counter will briefly read:
ABS
d1 SP E rr
When PLAY or RECORD are engaged, the TIME counter will change to show
minutes and seconds on the left, and a 4-digit error rate counter on the rate.
2 Repeat step 1 to return the TIME display to its normal state.
The TIME counter will briefly read:
ABS
d1 SP r E9
…and will then change back to show hours, minutes, seconds and 100ths-of-a-
second.
ABOUT ERROR RATE READINGS
A new, perfect tape on a clean machine will normally read “0000”
with occasional flashes up to “0005” or “0010”. Errors of 3 or below
are 100% correctable, and the odds are that significantly higher
readings will also be 100% correctable. Many new tapes out of the box
from some manufacturers have readings up to 100. Readings above 1000,
however, are guaranteed to cause some interpolation to take place.
Therefore, readings up to about 10-15 aren’t anything to worry about
unless accompanied by the Interpolation indicator; but they do show
you that there is something less than ideal about current conditions. If
readings rise above 20, you should take action (see ADAT Head
Cleaning). If your brand of tape has a typical error rate above 20, that's
acceptable, but you want to look out for increases above the usual.
ADAT HEAD LIFE
The expected head life for each ADAT varies according to a number of factors.
Given optimum conditions, tape quality, tape care, and operating environment
head life for the average ADAT will always be better than if your ADAT is
abused, placed in bad environmental conditions and used with badly
maintained tapes. Properly cared for, your heads should last for thousands of
hours.
- INTRODUCTION 2
- HOW TO USE THIS MANUAL 2
- Introduction/Contents 3
- 2 ADAT XT20 Reference Manual 3
- CONTENTS 4
- APPLICATIONS 91 6
- TROUBLESHOOTING 99 6
- ERROR CODES 105 7
- SPECIFICATIONS 110 7
- GLOSSARY 112 7
- INDEX 119 7
- SETTING UP 8
- AVOIDING GROUND LOOPS 9
- ABOUT AUDIO CABLES 11
- BASIC AUDIO HOOKUP 12
- “THREADED” VS. “UNTHREADED” 13
- OPERATING ENVIRONMENT 14
- Chapter 1: Setting Up 15
- 14 ADAT XT20 Reference Manual 15
- YOUR FIRST SESSION 16
- WITH THE ADAT 16
- -- -- -- 17
- FORMATTING A TAPE – A MUST! 18
- RECORDING WHILE FORMATTING 19
- 0H 15M 48S 21 20
- 0H 01M 29S 03 20
- 20 ADAT XT20 Reference Manual 21
- TRANSPORT BUTTONS 22
- RECORDING 22
- PLAYBACK 23
- REVIEWING AND CUEING 23
- ADAT XT20 Reference Manual 23 24
- LED will turn on 24
- LOCATING 25
- AUTOMATED RECORDING 28
- PITCH CONTROL 30
- TRACK DELAY 30
- 30 ADAT XT20 Reference Manual 31
- TRACK COPY 32
- DISPLAY BRIGHTNESS 32
- 32 ADAT XT20 Reference Manual 33
- Chapter 3: Connections 35
- 34 ADAT XT20 Reference Manual 35
- Larger Key Notch 36
- 36 ADAT XT20 Reference Manual 37
- In 8 p l k Out 8 A E F 37
- ANALOG INPUT SELECT MODE 38
- SYNC IN/OUT 39
- Ovt 16dt 40
- 40 ADAT XT20 Reference Manual 41
- FOOTSWITCHES 43
- THE XT20 REMOTE 43
- BASIC OPERATIONS 44
- COMPLETE FORMAT 45
- FORMAT EXTEND 46
- Pr 0t 0 FF 47
- Pr 0t 0 n 48
- READING THE DISPLAY 49
- DISPLAY ICONS 50
- Chapter 4: Basic Operations 53
- 52 ADAT XT20 Reference Manual 53
- BASIC EDITING 56
- EDITING INDIVIDUAL DIGITS 57
- INPUT SELECT 58
- DIGITAL INPUT 59
- TRACK COPY 59
- INPUT MONITOR 61
- Stop,Pause 62
- Rew.,F.Fwd 62
- PEAK MODE BUTTON 63
- PEAK CLEAR BUTTON 63
- FINE METER MODE 63
- Basic Operations: Chapter 4 64
- ADAT XT20 Reference Manual 63 64
- RECORDING A “BENCHMARK” TAPE 65
- RECORD ENABLE 66
- SETTING LEVELS 66
- TRANSPORT CONTROLS 68
- RECORD/PUNCH IN OR OUT 70
- SAMPLE RATE (CLOCK) 71
- FA dE 2@ 1 72
- 74 ADAT XT20 Reference Manual 75
- ➃ through ➆ 77
- AUTOLOCATION CONTROLS 78
- SETTING LOCATE POINTS 80
- AUTO LOOPING 81
- AUTO RECORD 82
- TAPE LENGTH 84
- FOOTSWITCH CONTROLS 86
- USING THE XT20 LRC REMOTE 87
- ADAT XT20 Reference Manual 87 88
- MULTIPLE ADAT 89
- SYNCHRONIZING MACHINES 90
- FORMATTING MULTIPLE TAPES 91
- MASTER FORMAT DISABLED 93
- RECORDING DIGITAL AUDIO 94
- MAKING DIGITAL BACKUPS 96
- IGITAL CLOCK CONSIDERATIONS 99
- 0H 00M 00S 00 100
- COMBINING XT20S AND ADATS 101
- POLARITY DIFFERENCES 103
- CONNECTIONS 104
- APPLICATIONS 106
- LIVE/LONG-TERM RECORDING 107
- COMPUTER CONTROL 108
- LIBRARIES AND ARCHIVES 109
- MODULAR RECORDING 109
- DIGITAL RECORDING 113
- CONCEPTS 113
- WHY S-VHS? 114
- TROUBLESHOOTING 116
- CHECKING SOFTWARE VERSION 117
- ERROR RATE DISPLAY 117
- ADAT HEAD LIFE 117
- ADAT HEAD MAINTENANCE 118
- DRUM TIME DISPLAY 119
- TAPE MAINTENANCE: SAFE TAPE 119
- MAINTENANCE/SERVICE 120
- ERROR CODES 122
- Appendix C: Error Codes 126
- SPECIFICATIONS 127
- Digital Inputs/Outputs 128
- GLOSSARY 129
- IBER OPTICAL CONNECTOR 131
- OUSE SYNC 131
- UNBALANCED AUDIO SIGNALS 133
- Glossary 134
- SET LOCATE button, 56, 57 138
- QuadraSynth User’s Manual 140
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