KENWOOD DX-7030

Commentary

DAT deck compatible with SCMS.

By adopting the SCMS method, the first generation digital to digital recording of 44 khz mode, which was not possible until now, has become possible.

The internal layout uses a mechanical mid structure.
In this method, the helical scan head rotating at high speed is made to coincide with the center of gravity point of the housing, and the most ideal center mechanism arrangement is made by vibration analysis. In addition, the effect of vibration is reduced by a high-rigidity design that employs a chassis based on 1.6 mm steel plate and a mechanical floor with box bridge structure.

3-frequency independent crystal -frequency independent crystal oscillator and is equipped with an independent crystal oscillator with the shortest circuit layout for each frequency of 48/44.1/32kHz, which is required for DAT for AD/DA, and minimizes jitter and external interference.
In addition, a high-precision master clock system is adopted for the crystal oscillator circuit, and the clock accuracy is improved by oscillating the operation reference signal using an equivalent circuit method without amplifying the disturbance noise that has jumped into the master clock.

The D/A converter employs a 1-bit pulse D/A converter in pursuit of differential linearity. The master clock, which requires the most precision, is 1024 times higher, making it possible to perform smooth D/A conversion.
In addition, the use of a multiple-feedback analog low-pass filter suppresses the change in phase characteristics to a low level.

The A/D converter uses a 64 fs Δ ∑ A/D converter with a fourth order noise shaper.

Using a double-sequence digital PLL circuit, the reference frequency shift and jitter are minimized by adopting a two stage configuration consisting of a digital signal input stage and a D/A converter unit.

It is equipped with high-speed digital DPSS (direct program search system).
The U-TOC information recording function of the DX-7030 enables high-speed search using absolute information for programs with U-TOC settings. In addition, it recognizes information such as the total time of all songs and the total number of songs, enabling high-speed and accurate detection.

An isobobbin power transformer is used as the power transformer, and five dedicated windings are provided for rotation servo, display tube drive, audio power supply, etc. to minimize mutual interference.

Equipped with a D/A monitor function that allows independent use of the D/A converter.

In order to shut out the potential difference between devices, the coaxial input is completely switched by the relay, which eliminates disturbance factors at the time of optical input and enables recording with high purity.
In addition, when no signal is input, the digital indicator flashes to inform the user, thereby preventing erroneous recording.

Equipped with a subcode editing function, you can edit start ID, skip ID, end ID, ID erase, auto / start ID, etc. You can also rearrange music numbers by renumbering, and edit by writing U-TOC information.

Equipped with display switching functions such as total time, one song time, remaining time and counter display.

Wireless remote control is included.

Model Rating

Type	DAT deck
Traveling system motor	For Capstan : DC Motor For Drum : DC Motor For loading : 4 DC motors
Early winding time	Approximately 40 seconds (120 minutes recorded tape)
Frequency characteristic	2 Hz to 22 kHz ± 0.5 dB
Signal-to-noise ratio	93dB
Dynamic range	92dB
Total harmonic distortion factor	Not more than 0.005%
Wow flutter	Below the measurement limit
Pwer	100 VAC, 50Hz/60Hz
Power consumption	27W
Maximum external dimensions	Width 440x Height 127x Depth 370 mm
Weight	7.6kg
Attachment	Wireless Remote Control