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| Pioneer PD-T07HSLimitede
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*They are 2,700 sets of limited productions. |
| 220,000yen(1996 release) |
The compact disk player of the limited model which
concentrated the wide-range technology of Pioneer which pursued the high-quality
digital sound, and was developed.
Hi-bit which is an original technology
of Pioneer is carried.
In order to presume the wave of an original sound
from d-Etah memorized by compact disk paying attention to the minute level
signal below a quantifying bit number,16 bit data of compact-disk format are
re-quantized to 24 bits, and quatization distortion is reduced while expanding a
dynamic range to the maximum quantity of 120dB which can detect people's ear.
The legato linking conversion S is carried, based on a 1/f damping
characteristics, the wave of the HARASHIN number is presumed to compact disk,
and the component of 20kHz or more which is not recorded is reproduced to it.
Furthermore, the harmonic-overtone component was generated also for a
component of 20kHz or more, the play band was expanded to 50kHz by uniting and
adding a time base, and the unnecessary ringing is also simultaneously swept
away from the damping characteristics based on [ carry out a higher-harmonic
spawn circuitry additional, and ] an estimation of an original sound which
became independent also to the harmonic overtone.
Wide-range DAC is
developed newly and carried in the digital-analog-converter part which changes
into an analog 24 bit data reproduced by Hi-bit and the legato linking
conversion S.
Two multiple bit DACs to which the property was equal were
formed into 1 chip, zero cross distortion and a glich noise were banished, and
the more faithful analog translation is realized by wide-band-izing a frequency
band to 50kHz.
The newly developed magnetic barrier substrate coated [
the magnetic substance ] is adopted as the circuit board, and an occurrence and
propagation of a digital noise are controlled.
Moreover, digital one/servo,
and the audio substrate were gained separate independence, and the noise
occurrence and propagation inside a set are prevented.
The high-quality
sound component partses "great supply" of special edition are adopted as the
capacitor for a rectification. Moreover, in order to prevent the noise
occurrence by the cross interferencee of a circuitry, the twin power transformer
which made it become independent the object for digital & servoes and for
analog circuits is carried.
Furthermore, the power circuit performed the
independent rectification for five parts of digital & servo [ by 5 parts and
13 regulator ], servo drive, digital-analog-converter, and audio +, and -, and
has prevented the cross interferencee between an electric power supply and a
circuitry. Moreover, the discrete low-impedance power circuit of original
development is adopted as analog output, and an incrementation and exogenous
noise of the impedance in the power-source transmission line are prevented.
The proprietary clean laser pickup is carried.
This pickup decreased
the power loss by deleting optical components, such as a collimator lens, and
has realized the signal reader chip box of a low distortion.
The Class-A
operation FET buffer amplifier which prevents a signal failure is carried in
D-A-conversion Ushiro's audio circuitry.
The large-sized brushless hall
motor (high starting torque 65 g-cm) is carried in the 4.5mm very-thick shaft
spindle motor in diameter.
The multilayer structure honeycomb chassis
excellent in vibration suppression nature is adopted, a heterogeneous metals is
laid on top of a Mechanism-base, and the lamisert Mechanism-base which carried
out molding by the special resin is used.
Moreover, a floating structure
etc. is adopted and improvement in vibration suppression nature and vibration
proof-ization are attained.
Original compact-disk turntable mechanism
which suppresses an unnecessary oscillation of a disk is carried.
Moment of
inertia is improving by about 3 times with supporting a disk the whole surface
from the bottom.
The direct construction which shortest-ized the signal
path is adopted, an analog circuit is connected with the shortest distance, and
measures against a noise, such as giving the shielding by the sheet metal made
from a copper plating steel plate, are taken.
If the compu-program edit
which replaces a music number, and a time of tape are specified so that the
residual time of a tapes may become a min only by setting the time of a tapes
with remote control,A specification of the time fade edit and time of tape which
carry out a fadeout to the time automatically, and will be in a pause status
carries the auto special-NetWare-program edit recorded without judging to the
how many music it can record, and making the last music break off.
Wireless remote control is attached.
|
| Form |
Compact disk player |
| Pickup |
3 beam semiconductor laser scheme
|
| Digital analog converter |
A multiple bit scheme and wide-range DAC
|
| Chassis structure |
Multilayer structure BMC honeycomb
|
| Frequency characteristic |
2Hz - 20kHz |
| SN ratio (EIAJ) |
115dB or more |
| Dynamic range (EIAJ) |
100dB or more |
| Channel separation (EIAJ) |
110dB or more |
| Wow and flutter (EIAJ) |
Below a limit of measurement (±0.001%W.PEAK)
|
| THD (EIAJ) |
0.0015% or less |
| Analog output level |
RCA:2V |
| Digital output |
Coaxial output: 0.5 Vp-p/75ohm
Optical
power: -15dBm--20dBm (wavelength of 660nm) |
| Power circuit |
2 transformers, 5 parts, and 13 regulator
|
| Power source |
AC100V, 50Hz/60Hz |
| Power consumption |
18W |
| Dimensions |
Width 440x height 140x depth of 341mm
|
| Weight |
12.6kg |
| Adjunct |
Wireless remote control |
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