Error Rate Display; About Error Rate Readings - Alesis ADAT-LX20 Reference Manual

Troubleshooting - Appendix B
E R
RROR ATE
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), up to a theoretical
maximum of 6720 errors. Selecting this display mode during any other mode than
play or record will always give a reading of "0000".
To view the error rate display:
Hold SET LOCATE and press RECORD ENABLE 3.
The TIME counter will briefly read:
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.
Repeat step
The TIME counter will briefly read:
...and will then change back to show hours, minutes, seconds and 100ths-of-a-
second.
A
BOUT
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 section QQ, 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.
78
D
ISPLAY
d1 SP E rr
ABS
to return the TIME display to its normal state.
d1 SP r E9
ABS
E R R
RROR ATE EADINGS
ADAT LX20 Reference Manual