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Akai GX-2800D-SS User Manual

Akai GX-2800D-SS
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ll.
MEASURING
METHOD
1.
TAPE
SPEED
DEVIATION
Frequency
counter
input
GX-280D-SS
Line
output
Fig.
1
As
shown
in
Fig.
1,
connect
a
Frequency
Counter
to
the
Line
Output
of
Model
GX-280D-SS.
Playback
a
1,000
Hz
pre-recorded
test
tape.
Take
a
Frequency
Counter
reading
at
the
beginning,
middle,
and
end
of
tape
winding
during
playback.
The
maximum
value
of
these
respective
readings
will
represent
tape
speed
deviation.
2.
WOW
AND
FLUTTER
GX-280D-SS
Wow.
and
Flutter
Line
output
Method
A
As
shown
in
Fig.
2,
connect
the
Line
Output
of
Model
GX-280D-SS
to
the
Input
of
a
Wow
and
Flut-
ter
Meter.
Playback
a
3,000
Hz
pre-recorded
test
tape
and
take
a
Wow
and
Flutter
Meter
reading
at
the
beginning,
middle,
and
end
of
tape
winding.
The
maximum
value
of
these
respective
readings
will
represent
the
Wow
and
Flutter.
Method
B
-
a
Supply
a
3,000
Hz
sine
wave
signal
from
an
Audio
Frequency
Oscillator
and
make
a
recording
on
a
blank
tape
at
the
beginning,
middle,
and
end
of
tape
winding.
Rewind
and
playback
the
resultant
signal.
Measure
Wow
and
Flutter
with
a
Wow
and
Flutter
Meter..(The
Wow
and
Flutter
value
of
Method
B
will-be
close
to
twice
that
of
Method
A.)
3.
FREQUENCY
RESPONSE
GX-280D-SS
Line
input
=
Line
output
Audio
Frequency
Oscillator
High
Sensitivity
V.T.V.M.
Fig,
3
For
measuring
Frequency
Response,
connect
instru-
ments
as
shown
in
Fig.
3
and
proceed
as
follows:
1)
Supply
a
1,000
Hz
sine
wave
signal
to
the
Line
Input
of
Model
GX-280D-SS
from
an
Audio
Fre-
quency
Oscillator
through
an
Attenuator.
2)
Set
recorder
to
recording
mode
and
turn
recording
level
control
volume
and
line
output
level
control
volume
to
maximum.
Adjust
attenuator
to
obtain
a
+4
dB
V.T.V.M.
reading.
3)
Under
conditions
described
in
2)
above,
readjust
attenuator
so
that
the
Line
Output
is
—16
dB, and
record
30
to
24,000
Hz
spot
frequencies.
4)
Rewind
tape
and
playback
from
the
beginning.
Take
V.T.V.M.
spot
frequency
readings
and
plot
values
on
a
graph.
NOTE:
When
measuring
Frequency
Response,
new
tape
should
be-used.
4.
SIGNAL
TO
NOISE
RATIO
GX-280D-SS
High
Sensitivity
V.T.V.M.
Line
output
Fig.
4
As
shown
in
Fig.
4,
connect
a
High
Sensitivity
V.T.V.M.
to
the
Line
output
of
Model
GX-280D-
SS.
Playback
a
250
Hz
“0”
VU
pre-recorded
test
tape
and
measure
the
output.
Therh
remove
the
tape
and
measure
the
noise
level
under
the
same
condition.
Convert
each
of
the
measured
values
into
decibels,

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Akai GX-2800D-SS Specifications

General IconGeneral
BrandAkai
ModelGX-2800D-SS
CategoryTape Deck
LanguageEnglish

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