DENON DCD-2000

Commentary

The first DENON CD player.

A 3-spot type laser pickup is used for the pickup part.
This method consists of a main laser spot for code detection and two sub laser spots for tracking error detection. The reflected light from these two laser spots for error detection is converted into an electrical signal before entering an error signal amplifier. If tracking is accurate, the output of the error signal amplifier is 0. If there is even a slight difference, the error signal amplifier produces an output as an input difference. This error output goes into a servo circuit and moves the objective lens to correct the position of the main laser spot.
In addition, a focus servo system is adopted so that the focus of the focus lens always matches with the accuracy of ± 1 μ m against the vertical fluctuation of the disk.

The signal read by the laser pickup is first amplified by a preamplifier to a level that is easy to process. Then, 0 or 1 is determined by a data straw circuit. Errors are detected and corrected. The signal is rearranged in the order before interleaving. After that, the signal is converted into an analog signal by a D/A converter.

The D/A converter is equipped with a newly developed D/A converter. It generates a highly accurate signal internally in advance, uses it as a reference to configure the operation of the converter itself accurately, stores the value in the internal RAM (Random Access Memory), and automatically corrects errors caused by element variations.

The drive system uses a direct drive system equipped with a DC servo motor developed for CD players.

Model Rating

Type	CD Player
<Audio>
Number of channels	2 Channel
Frequency characteristic	5 Hz to 20 kHz ± 0.5 dB
Dynamic range	90 dB or more
Signal-to-noise ratio	90 dB or more
Harmonic distortion factor	Not more than 0.03%
Crosstalk	85 dB or More (1 kHz)
Wow and flutter	Measurement limit (± 0.001% w. peak) squid
Output voltage	1.4 Vrms at full scale
<disk>
Playing time	60 Minutes / One Side
Diameter	120mm
Signal Format
Sampling frequency	44.1kHz
Quantization number	16-bit linear / channel
Transmission bit rate	4.3218Mb/s
<Pickup>
Method	Objective lens drive type optical pickup
Objective lens drive system	2 d parallel drive
Light source	Semiconductor laser
Wave length	7900 Å
<Others>
Accessory function	Random memory selection (up to 15 songs) Quick Select Skip monitor Memory Stop Pose Repeat Output volume
Show	Playing position (5 minute step) Number of songs Music number Playing time Output volume level
Other	Level variable headphone jack Two output terminals (fixed, level variable)
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption	24W
External dimensions	Width 320x Height 145x Depth 234 mm
Weight	5.6kg