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Sony BVU-950 - Page 35

Sony BVU-950
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section
2.
pynamic
Tacxing
FOR
TRAINING
PURPOSES
ONLY
BVU-920
-PRELIMINARY-
2-2-3.
Wobbling
Control
SUBJECT
TO
CHANGE
In
wobbling
control,
the
height
of
DT
head
is
altered
to
achieve
maximum
RF.
(Note
that
wobbling
in
the
BVU-920
is
not
the
same
as
in
previous
units.)
In
previous
units,
the
height
of
the
head
was
vibrated
about
15
times
in
each
one
field.
In
the
BVU-920,
the
wobbling
frequency
is
lower
than
previous
one.
It
is
changed
once
per
three
fields.
Playback
RF
data
is
sampled
three
times
per
field
and
a
total
of
9
sampling
locations
for
three
fields.
These
points
are
close
to
start
of
each
field.
Ach
—
i
ot
snc
a
cares
aL
Ai
2
Yy,
WY
cz)!
LAVBACK
RF
LEVEL
.
er
a
Nes
DO
Ia?”
(4)enase"
UL
UL
|
wosstns
——s—CS=i‘__
VOLTAGE
oe
it
-
4-19

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