1.4.1.1
BIT-JITTER
Bit jitter reduction determines the relationship between the leading edge
of
Read
data
and the center
of
the data window.
The specified Read error rates are based
on
the following bit jitter specifica-
tion: The
data
separator must provide
at
least -40 dB
of
bit jitter reduction-
at
2F with
an
offset error
of
less than
1.5
nsec. shift from the center
of
the data
window.
1.4.2
MEDIA DEFECTS
A media defect
is
a Read error when data, which has been correctly written,
cannot be recovered within
16
retries.
A printout will be provided with each drive shipped-listing the location
of
any
defect by head, cylinder, sector and byte.
5
It will also specify the number
of
bytes
from Index.
There will be no more
than
four
(4)
defects per Read/Write head for a maxi-
mum
total
of
sixteen
(16)
per drive. Cylinder Zero will be free
of
defects.
1.5
1.5.1
Operating:
Nonoperating:
1.5.2
Operating:
Nonoperating:
1.5.3
Operating:
Maximum
Wet
Bulb:
Nonoperating:
1.5.4
Operating:
Nonoperating:
1.5.5
ENVIRONMENTAL SPECIFICATIONS
AMBlENT TEMPERATURE
10
oC
to
45
oC
(50
OF
to
113
OF)
-40°C to 60°C (-40°F to 140°F)
TEMPERATURE GRADIENT
10°C/hr (18°F/hr) max.
Below condensation
RELATIVE HUMIDITY
8 to
80070
noncondensing
26
oC
(78.8
OF)
5 to
95070
noncondensing
ALTITUDE LIMITS
-1,000
ft to 10,000 ft
-1,000
ft
to
30,000
ft
OPERATING SHOCK
Maximum permitted shock without incurring nonrecoverable errors:
10
O's
6.7
1.5.6
NONOPERATING SHOCK
Maximum permitted shock without incurring physical damage
or
degradation
in performance: 40
0'S8
..
5.
Based
on
a 32-sector,
256
byte/sector format
6.
Il
msec.
-half-sine
wave
shock pulse.
7.
Input
levels
at
the drive mounting
screws,
drive mounted in an approved orientation.
8.
Il
msec., half sine-wave
2
ST212
PRODUCT
MANUAL/Rev.
B
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