Akai Reference Master GX-75 - Page 12

For
improved
recordings
2
an
a
i
Tee
a
Recording
calibration
:
Calibrating
the
loaded
cassette
tape
1 Load the cassette tape for recording.
Set the CAL switch to = .
2
The
calibration
signal
will
be
supplied
and
the
peak
level
meter
will
be
replaced
by
the
BIAS
and
LEVEL
calibration
indicators.
3 Press the s@# button and the ® button simultaneously to
start recording calibration.
The calibration level meter will appear on the FL display.
Turn the BIAS CALIBRATION control toward the left or
right until the level meter does not exceed the BIAS indica-
tor.
Turn the LEVEL CALIBRATION control toward left or right
until the level meter does not exceed the LEVEL indicator.
Repeat steps 4 and 5 until the proper bias and level is ad-
justed.
Press the REC CANCEL button to cancel the calibration
signal.
The calibrated section of the tape will be rewound and the
deck will go into the recording standby mode automatical-
ly.
Set the CAL switch to m .
The calibration level meter will be replaced by the peak
level meter and the cassette deck will go into the stop
mode automatically.
Press the ses and P button to start recording.
Cassette
tape
and
recording
calibration
Cassette
tapes
can
be
separated
widely
into
3
types;
Normal
position,
Chrome
(CrO2)
position
and
Metal
position.
Record-
ing
characteristics
vary
slightly,
even
with
tapes
that
have
the
same
tape
position.
For
good
recording
results,
precise
adjustment
of
the
tape’s
bias
current
and
sensitivity
level
is
necessary.
Calibration
improves
the
performance
of
the
cassette
tape
and
noise
reduction
system
being
used.
This
cassette
deck
calibrates
the
bias
current
and
sensitivity
level
according
to
the
loaded
cassette
tape.
Calibrating
the
sensitivity
level
to
its
optimum
level
helps
the
noise
reduction
system
to
operate
accurately
and
effectively
during
recording.
If
the
bias
and
sensitivity
levels
of
the
cassette
deck
are
not
set
properly,
the
recorded
sounds
will
include
some
coloration
and
loss
of
maximum
output
levels
(MOL)
at
high
frequencies
and
the
noise
reduction
system
will
not
operate
properly.
Bias and level calibration indicators
Turn the BIAS and LEVEL CALIBRATION controls.
CALIBRATION
LEVEL
BIAS
ie) 0
2 s°~
A s % Ss
? S 7 SS
oe a.
Notes for calibration
@ For standard bias and sensitivity level calibration, set both
the BIAS and LEVEL CALIBRATION controls to their center
positions.
@ ([fthe tape is not rewound after calibration, recorded calibra-
tion signals will be left on the tape.
@ Be sure to set the CAL switch to .m after calibration.
@ If you change cassette tapes during recording, repeat the
calibration operation for the the newly loaded cassette tape.
@ The noise reduction system is defeated while the CAL
switch is setto = .
@ After calibration is finished and recording has begun, do not
adjust the BIAS or LEVEL CALIBRATION controls.
@ The BIAS and LEVEL CALIBRATION controls are ineffec-
tive during playback.
e@ Pressing the CAL switch cancels all other tape operations.
The cassette deck will go into the stop mode if the CAL
switch is pressed when the cassette tape is running.