Audio Database

The

Pioneer D-50
85,000yen(around the 1991 time)

Description
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The DAT deck which carries a 1-bit analog-to-digital converter and a bit stream digital analog converter.

The newly developed 1-bit analog-to-digital converter and the bit stream digital analog converter (system-application-architecture7350) are carried in the translation part.
Since this 1-bit scheme does not need to take into consideration problems, such as an error of an electrical resistor, or gap of timing of operation, as compared with a multiple bit scheme, it is excellent in a linearity and does not have an occurrence of nonlinear distortion or zero cross distortion theoretically.
The completely same device as what is adopted as digital-analog-converter PD-T07 is adopted, the translation error at the time of a minute signal is reduced, and the modification of a linearity is aimed at.

In order to eliminate the shake of an important clock signal by a 1-bit scheme, the clean clock circuit into which the audio system and the digital system made the clock signal divide is adopted.
High S/N and the Low-noise-izing are attained by carrying out the oscillation of the clock which controls a system itself to a clearance, and making it drive independently by this.

The high-output AT (All Track) head developed by the original precision technology of Pioneer is carried in the head.
AT structure which carried out a 20-micrometer uniform track manipulation to the trances orientation of a track was the distinctive characteristics, AT head carried out the welding of the glass to each sides in order to raise wear resistance, is performing special polishing about the gap which is an entrance of a signal, and has realized the tapes touch stabilized more.
Moreover, little signal reading of an error rate is realized by making high a play Output voltage of 2-6dB.

LP (long time) mode which realizes twice as many sound-recording time as SP (standard) mode at the time of an analog input sound recording and a digital input sound recording with a sampling frequency of 32kHz is carried. Thereby, the succession sound recording of a maximum of 4 hours is possible on a 120-minute tapes.

The TOC (Jump Table segment of Contents) functionality which records intelligences, including the time of a special NetWare program, the length of each music, etc., on the location of the beginning of a tapes is carried. By this functionality, information management, such as music time of each [ the number of total music and total time, and ] music, start time of each music, and residual quantity time of a register fraction, is possible also for DAT.

About 300 times (at the time of LP about 600 times) as many A.I. Artificial Intelligence search functions are carried at the time of the fastest which utilized the TOC functionality.
This carries functionalities, such as A.I. Artificial Intelligence search [ using a TOC intelligence ], time skip, Tip-of-the-Day memory, random play, and fine Cue/Review.

As a time intelligence, A-Time which shows the lapsed time from the beginning of a tapes, P-Time which shows the lapsed time from the head of each music, the end mark which shows the ending point of a sound recording, etc. can be displayed.

The 1.6mm flat chassis which has the flat structure which performed the special manipulation in a mechanism part was adopted, the unnecessary oscillation generated by a mechanism was reduced, and the tapes run stabilized more is realized.
Moreover, the original cassette stabilizer of Pioneer which suppresses a cassette half's oscillation is carried, and it puts with the special rubber of the upper and lower sides of a cassette half, and also a cassette half is firmly fixed by holding down two right and left by a resin, and the oscillation is reduced.

The large-sized honeycomb insulator excellent in the periodic-damping property and the honeycomb chassis are adopted as a chassis.

In order to reduce the ill effect by unnecessary oscillation of a drum, the structure of the rotating drum was improved from the origin and the low oscillation and the low undesired-sound structure are adopted.

The direct construction is adopted as an input volume and the signal from an analog input termination is reducing the failure by leading about of a signal path in being inputted into an input volume by the shortest distance.

Internal
1 AT Parts

Rating of a mode
Form Swivel head scheme digital audio taperecorder
Tape speed 8.15 mm/s (SP), 4.075 mm/s (LP)
Sound-recording time SP: A maximum of 120 minutes
LP: A maximum of 240 minutes (at the time of a 120-minute tapes using)
Quantifying bit number 16-bit linear
12-bit non-linear (LP)
Sampling frequency (SCMS loading) 48kHz (a sound recording/play)
44.1kHz (only a digital input a sound recording/play)
32kHz (SP: the sound recording/play of only a digital input)
32kHz (LP: a sound recording/play)
Sound-recording frequency characteristic SP: 2Hz-22kHz}0.5dB
LP: 2Hz-14.5kHz}0.5dB
SN ratio 91dB or more
Dynamic range 91dB or more
THD 0.0045% or less (1kHz)
Wow and flutter Below a limit of measurement (}0.001%W-Peak)
Analog-I/O termination Line input: RCA Pin, one line, 500mV
Line output: RCA Pin, one line, 500mV
Digital-input/output termination Coaxial input terminal: RCA Pin, one line, 0.5 Vp-p
Coaxial output-terminal: RCA Pin, one line, 0.5 Vp-p
An optical input terminal: One line
Optical-power termination: One line
Supply voltage AC100V, 50Hz/60Hz
Power consumption 20W
The maximum Dimensions Width 420x height 133.5x depth of 316.5mm
Weight 5.4kg
Adjunct Wireless remote control CU-D007