Teac TASCAM 32 - Tape Speed

2-8,
REEL
TABLE
HEIGHT
ADJUSTMENT
Tape should
wind evenly
on Reel
Reel
height
adjustment
is
required
only
if
a
motor
has
been
replaced
or
if
tape
rubs
exces-
sively
against
the
reel
flanges.
Adjustment
is
accomplished
by
loosening
the
reel
set
screws
and
moving
the
reel
table
on
the
motor
shaft
as
shown
in
Fig.
2-6.
Remove
the
bonnet
panel
on
the
left
or
right
of
the
unit
for
access
to
the
set
screws
(2)
in
the
reel
motor
shaft.
Reel
table
should
be
adjusted
using
standard
NAB
7”
reels.
With
a
tape
loaded
on
the
machine,
position
the
reel
table
height
for
smooth
tape
travel.
Be
sure
to
tighten
the
set
screws
after
each
adjustment
is
made.
Refer
to
page
78
(section
2-2).
2-9. TAPE SPEED
Tape
speed
is
measured
by
using
flutter
test
tape,
which
contain
a
highly
accurate,
con-
tinuous
3
kHz
tone.
Test
Tape:
TEAC
YTT-2004
(for
tape
speed
15 ips)
TEAC YTT-2003 (for tape speed
7-1/2 ips)
1.
Connect
a
digital
frequency
counter
to
either
OUTPUT.
2.The
indicated
frequency
should
be
3
kHz,
+0.8
%
for
all
speeds.
3.
Play
the
middle
of
the
test
tape
at
high
speed
15ips
(38cm/sec)
and
adjust
the
HIGH
speed
trimmer
resistor
until
the
fre-
quency
counter
indicates
a
reading
of
3000
Hz.
Use
the
LOW
speed
trimmer
resistor
for
low
speed
adjustment
7-1/2
ips
(19
cm/sec).
See
Fig.
2-7.
(CAUTION:
Use
an
insulated
screwdriver
to
prevent
shorting.)
4.
Playing
the
tape
at
both
the
beginning
and
the
end,
check
that
the
tape
speed
does
not
vary
any
more
than
the
limits
prescribed
in
the
specifications,
so
that
there
is
never
a
total
deviation
of
more
than
+0.8Hz
from
the
3000
Hz
test
tone.
5.
If
tape
speed
is
greatly
offset
from
the
specifi-
cation,
check
pinch
roller
pressure
and
takeup
tension for correct values, and see that the
tape path is clean.
oe © |
Fig. 2-7.
2-10.
WOW
AND
FLUTTER
CHECK
(Reproduce
Method)
1. Connect a Wow-and-Flutter Meter to the deck
as shown in Fig. 2-8.
These meters will measure the ANSI peak
value or the NAB rms value depending on the
switch selection on the meter.
2. Playback the appropriate wow-and-flutter test
tape.
3. If the peak or rms weighted value is to be
read, set the Wow-and-Flutter Meter for the
“Weighted” readings and also make sure that
the meter is properly calibrated.
4. As the measured results may vary with respect
to the location on the tape at which the mea-
surement is taken, at least two locations — at
the beginning and near the end of the tape —
should be checked. There may also be slight
differences in absolute values measured
according to the brand of the meter being
used.
Values should be as shown:
Tape | DIN/IEC/ANSI (peak value) NAB (rms value)
speed | Weighted | Unweighted | Weighted
HIGH | 40.06% | +0.09% 0.05% | 0.07%
0.07% | 0.09 %
82