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Fostex A-8 - Page 37

Fostex A-8
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RECORD
TRACK
buttons.
2)
Playback
the
Head
Azimuth
and
Frequency
Response
sections
of
the
Reproduce
Align
ment
Tape.
The
Azimuth
and
Phase
Adjusting
Screw
is
adjusted
for
this
alignment
as
shown
in
Fig.
6-12.
Fig.
6-12
3)
Adjust
the
Azimuth
and
Phase
Adjusting
Screw
for
maximum
reading
on
all
eight
VU
meters
of
the
recorder.
Then,
connect
the
vertical
input
of
the
oscilloscope
to
TRACK
1
output
and
the
horizontal
input
to
one
among
TRACKS
2^8,
set
the
oscilloscope
to
XY
mode
to
obtain
a
lissajous
waveform
to
check
the
phase.
Trace
for
vertical
input
alone
Trace
for
horijontal
Unequal
levels
input
alone
If
the
trace
length
between
(1)
and
(2)
are
not
the
same,
it
means
that
the
two
inputs
are
not
of
the
saine
level.
Correct
for
equal
lengths
by
the
oscilloscope
controls.
If
the
playback
head
azimuth
is
out
of
alignment,
the
following
patterns
will
result:
(A
small
misalignment
30°
out
of
phase)
(A
larger
error
90°
outof
phase
)
(A
big
one,
180°
out
of
phase)
(Perfect
azimuth
0°,in
phase)
Fig.
6-13
37

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