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FEATURES
Transport Section Engineered for Stable Tape Run
This deck features the closed loop dual capstan system whereby
a capstan is stationed on either side of the heads. This system
maintains a stable contact between the heads and the tape so that
the tape travels at a constant tension all the time, and it also helps
to suppress dropouts in the tape and fluctuations in the level.
Another important point is that external vibration transmitted from
the reel bases and tape guides to the tape is kept down to the
minimum for a marked reduction in the modulation noise and both
recording and playback which are faithful to the original sound.
The DC servo motor which provides a stable rotational speed is
combined with the ultra-precision-engineered capstans and good
dynamic balance flywheels to yield a truly superior tape transport
performance, and a great improvement in the wow and flutter
characteristics.
Yet another prime feature is the mechanical governor motor
with its powerful rotation torque and less ripple. This is used for
the take-up operations, and enables reliable fast forward and
rewind operations.
Three-Head System with Recording/Playback
Combination Head
This deck adopts a recording head and a playback head which
are combined to fit neatly into a single case as a tidy package. Each
head is made of a sendust core and this makes it possible to exploit
the features of both chrome tapes and ferrichrome tapes to the full.
The heads are provided with a high level of resistance to wear and
are tailored to produce top-notch distortion characteristics with
high input signal levels as well as an excellent frequency response
and signal-to-noise ratio. The contact between the heads and the
tape is surefire and firm and the adhering of dust and generation of
noise caused by magnetization are reduced to the minimum. These
are just a few of the amazing powers of the heads. What's more, the
combination head can be used to monitor a recording virtually in
real time if the playback head is put to work while you are
recording.
Built-In Microprocessor Gives Digital Level
Indication and Tape Counter
This deck contains a 'brain': a 4-bit parallel processing 1-chip
microprocessor which is the secret behind the digital indication of
the recording and playback levels on the fluorescent display tubes.
The level meter extends to cover a range from -20dB up to +7dB.
Indication between -4dB and *7(18 is in IdB steps which allows
high-level signals movements to be grasped at a glance and the
recording level to be set just as easily.
The level meter can serve to display normal VU readout, or it
can be made to function as a peak meter to detect accurately
pulse-like sound. Moreover, while the meter is working as a peak
meter, the maximum level of the program source can be held on the
display simply by depressing the peak hold switch. All these
functions are made possible by three meter switches. If they are
selected in accordance with the program source which is being
recorded, you will be assured of faithful recordings which feature a
good stgnal-to-noise ratio even with program sources with wide
dynamic ranges.
The tape counter is another dramatic new feature. Instead of the
usual mechanically rotating figures, it comes in the form of a 3-digit
'digitron' display tube which makes use of the built-in micro¬
processor and its counter function to detect the pulses generated as
the reel bases rotate. These pulses are translated into digits which
are then displayed. This electronic tape counter is extremely handy.
Equalizer Circuit and Bias Control Mechanism
Aimed at Making the Most of the Tapes'
Characteristics
The built-in equalizer circuitry is specially designed to cater not
only to chrome tapes but also to ferrichrome tapes and standard
tapes. There's a bias control knob, too, which allows you to adjust
the bias current in accordance with the type of tape you are using in
the deck. The equalizer circuitry with its dedication to accuracy and
the bias control ensuring the ideal value team up to give tape
recordings with an extremely low level of distortion at all times.
You can also obtain the frequency response of your choice by
changing the value of the bias current.
If you load a chrome tape with the extra detection holes into
your deck, the equalizer circuitry and the bias current will both be
selected automatically by the automatic selector mechanism. This
means that you do not have to fiddle around making adjustments
after loading.
Feather-Touch Electronic Mechanical Control
Based on LSI (Large-Scale Integrated Circuitry)
The
tape
transport selector mechanism employs electronic
mechanical control based on a dual-in-line 24-pin C MOS LSI circuit.
You can set the deck to any mode, whether playback, recording,
fast forward, rewind or stop, from one mode directly with a feather
touch operation. When the tape transport is changed over from fast
forward to play or from fast forward to rewind by the commands
from the LSI's program, the deck is put through the stop mode
automatically. This means that the tape is never harmed in any way.
Even when two mode buttons are depressed accidentally together,
the deck is set to the stop mode first and so there is absolutely no
fear of a breakdown of malfunction.
Microprocessor with Six Different Programs in
Its Memory
The LSI accommodates six different programs: the MEMORY
STOP which automatically rewinds the tape to the position where
the tape counter was set to '000'; the MEMORY PLAY which
commences playback again after the tape has been stopped; the
REPEAT END which repeats tape playback automatically from the
tape start point; the COUNTER REPEAT which repeats the tape
playback from the start of the program where the tape counter was
set during playback to '000' up to the end of the tape rewind; as
well as the unattended recording and wake-up playback functions
which can be employed when you hook up an optional timer to the
deck.
Variety of Accessory Mechanisms
Input selector switch;
This switch can be selected between the program source connected
to the rear panel input jacks and the sound from a microphone.
Dolby noise reduction system:
A newly developed low-distortion 1C is used for the Dolby system.
This serves to reduce greatly the irritating noise heard when you
play back a tape, and it does this without impairing the sound
quality of the original program source. This helps to increase the
dynamic range, and it allows recordings and play back with a good
signal-to-noise ratio.
Front Panel Design Based on Concepts of Human
Engineering for Superior Functionality
The front panel adopts a design which provides for easy
operation of the feather-touch control switches and also a digital
display. The end result is an extremely simple yet superbly func¬
tional design employing the very latest in electronics technology.
2
Manufactured under license from Dolby Laboratories.
*Do!by and □□ are trademarks of Dolby Laboratories.
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