The Sony DTC-690 was introduced in 1993.
The DTC-690 is a stripped down version of the DTC-59ES.
Serial copy management system
This unit utilizes the serial copy management system that permits digital-to-digital recording tor one generation. You can record CD sound or other digital formats through a digital-to-digital connection.
Three sampling frequencies
Recording/playback can be done with three sampling frequencies (48 kHz, 44.1 kHz and 32 kHz).
48 kHz: For analog and digital input signals in a standard mode.
44.1 kHz: For compact disc and pre-recorded DAT tape.
32 kHz: For analog input signals in a long-play mode.
Long play mode
This unit can operate in a long-play mode. Analog input signals can be recorded or playback for up to four consecutive hours when the DT-120 DAT cassette tape is used. The sampling frequency will be 32 kHz in the long play mode.
Visible cassette loading
You can view the tape operation through the lid of the cassette compartment. Due to a revolutionary new transport mechanism, cassette loading time has been significantly reduced.
Excellent sound quality
• 1-bit A/D converter - For the A/D converter section which converts analog input signals to digital signals, the unit employs a 1-bit A/D converter which theoretically generates no zero-cross distortion for a clear, elegant sound quality.
• Pulse D/A converter - Superior playback performance is achieved with a 1-bit D/A converter.
Rich variety of subcode information
This unit can record subcode information such as Start IDs, program numbers, Skip IDs, and absolute time data, enabling you to quickly locate tunes and display the playback time in the same manner as when playing compact discs.
Post edit recording of sub codes
You can record or rewrite the following sub codes after the audio signal recording has been completed. Start ID: Signifies the beginning of a selection.
Program number: Gives a number to the selection.
Skip ID: Signifies the beginning of a portion to be skipped.
End ID: Signifies the end position of recording/ playback.
Since sub codes are written on the tape separately from audio signals, the audio signals are not affected.
|Tape||Digital audio tape|
|Recording head||Rotary head|
|Recording time||Standard: 120 minutes
Long-play mode: 240 minutes (with DT-120)
|Tape speed||Standard: 8.15 mm/s
Long-play mode: 4.075 mm/s
|Drum rotation||Standard: 2,000 rpm
Long-play mode: 1,000 rpm
|Error correction||Double-Read Solomon code|
|Track pitch||13.6 µm (20.4 µm)|
|Sampling frequency||48 kHz, 44.1 kHz, 32 kHz|
|Modulation system||8-10 Modulation|
|Transfer rate||2.46 Mbit/sec|
|Number of channels||2 channels, stereo|
|D/A conversion (Quantization)||Standard: 16-bit linear
Long-play mode: 12-bit non-linear
|Frequency response||Standard: 2-22,000 Hz (±0.5 dB)
Long-play mode: 2-14,500 Hz (±0.5 dB)
|Signal-to-noise ratio||Standard: more than 90 dB Long-play mode: more than 90 dB|
|Dynamic range||Standard: more than 90 dB Long-play mode: more than 90 dB|
|Total harmonic distortion||Standard: less than 0.005% (1 kHz)
Long-play mode: less than 0.08% (1 kHz)
|Wow and flutter||Below measurable limit (±0.001% W. PEAK)|
Tape Transport Mechanism Type:
Model Using Similar Transport:
Sony DTC-690 User Manual (DTC-690.PDF)
Sony DTC-690 User Manual
|Number of Pages||60|
|File Size||0.5 MB|
Istruzioni per l'uso
Manual de Instruï¿½ï¿½es
Manual de instrucciones
Sony DTC-690 Service Manual (DTC-690SM.PDF)
Sony DTC-690 Service Manual
|Number of Pages||63|
|File Size||11 MB|
Click on thumbnails for larger image