North Star DIMENSION Service Manual page 167

DIAGNOSTICS
(cont.) Service Diskette #3
Key Test Name Test Description
[A] Alternate Values This option selects and deselects alternate
values for the tests found on this menu.
The "A" key is the toggle switch.
If the alternate values are in effect, the
box says [ON]. If you deselect the
alternate values, you have the option of
saving them automatically into the file
called INITXX.VAL. If the values are
saved , they may be read and used by
toggling the alternate values switch [ON].
[B] Bit Error Rate This option allows you to change the bit
error rate that the tests expect to achieve
by providing a multiplier for the basic rate
of ten to the eighth power. The
multiplier changes the bit error rate to
some multiple of the basic rate. After
each write / read of the bit error rate, a
counter is incremented and the number in
this counter is used to determine whether
the number of recovered read errors is
acceptable . The higher the number the
more stringent the test . Default values
are provided for each version of the test
by selecting the number zero.
[C] Clear Error Flags This option clears all internal error flags,
zeroes the timer and allows testing of
previously failed tape drives. If the flags
are not cleared, a tape drive that has
failed before is immediately rejected.
DIMENSION Service Manual 3-55