ALL SYNCHRONISATION MODES
AD CONVERTER DPR-AD01
The new AD01 from DPR is a professional 20-Bit analog to digital converter, combining superior analog input circuitry with extensive external synchronisation modes.
By using an internal 20-Bit sampling frequency converter, the A/D-converter circuit always turns on its own crystal based clock reference whereas sampling frequency fluctuations and jitter of the external sync signal do not imply signal degradation of the conversion process due to the attenuation of jitter-frequencies above 3 Hz. The AD01 can be synchronised to either wordclock signals (28 kHz up to 56 kHz) or to an AES-EBU clock as well as to video PAL or NTSC-signals (provided the video option is installed).
A 35-step bargraph display enables the user accurate metering of the input signal and due to the internally used DSP, a true digital peak or VU-meter with selectable characteristics and time constants offers, therefore, a maximum of available dynamic range. Five standard input reference levels (-10 dBu, 0 dBu, +4 dBu, +6 dBu, +15 dBu) as well as a user defined reference level help to integrate the AD01 in any existing studio environment.
The AD01 has a professional AES-EBU output or alternatively a consumer SPDIF coaxial and optical output, all of them providing full implementation of the necessary channel status.
Additionally the AD01 offers a stereo or a true 2-channel mode, a switchable limiter on the analog inputs as well as a 16-Bit mode providing properly dithered output data for CD and RDAT applications.
With its superior sound quality and its large dynamic range the AD01 is the right choice for the professional recording studio, the broadcaster, the professional video studio or the high end consumer user.
Specifications of the AD01 ConverterAnalogical part
?2 ajustable analogical inputs with 2 potentiometers as well as 2 commutators allowing to choose the input level (+ 15 dBu, + 6 dBu, + 4 dBu, 0 dBu, - 10 dBu and adjustable from + 15 dBu to - 10 dBu).
?The inputs are symmetrical with transformers.
?The inputs are on cannon connectors.
?The inputs can be selected in stereo mode or in 2-channels mode.
?The inputs are provided with 2 analogical limiters which can be selected. The adjustment of the threshold can be chosen internally.
?Selection of the emphasis (on/off).
?The display is composed of 2 x 35 Led. It is a digital measure of the signal processed by a DSP which allows the display of the signal value in Peak-meter or in Vu-meter.
?2 additional Led are intended for displaying the overload of which parameters can be modified through PC (RS232).
?In peak hold mode, the peak display as well as the overload are memorized permanently and can be deleted.
?The AD converter is a 20 Bit converter which always turns on its own internal reference frequency. When using external synchronisation, a SFC (sampling frequency converter) is used. The SFC does not imply signal degradation due to conversion process. That characteristic is an important advantage of our AD converter.
?The AD converter also works on a 16 Bit mode basis for CD or RDAT applications.
?1 AES/EBU output (cannon connector).
?2 SPDIF outputs : 1 coaxial and 1 optical.
?All selected functions (e.g. Emphasis, S/2-CH, 20/16) are included in the status of the AES/EBU or SPDIF signal.
?Internal 48 / 44.1 / 32 kHz.
?AES/EBU (cannon connector).
?Wordclock from 28 kHz to 53 kHz (BNC connector).
?PAL or NTSC (color or B/W) video sync. with optional module (BNC connector).
SPECIFICATIONS (@ 48 kHz sample rate)
Resolution 20 Bit or 16 Bit switchable Frequency response 20 Hz - 20 kHz ?0.1 dB THD + N (@ -30 dBfs) -100 dBfs Dynamic range -104 dBfs Linearity @ 0.997 KHz 0 dBfs -> -90 d Bfs ?0,1 dB
- 90 dBfs -> -110 dBfs ?0,2 dB
Channel separation 20 Hz - 20 kHz > 100 dB Sampling rate 48 kHz, 44,1 kHz, 32 kHz switchable External reference Wordclock, AES-EBU, Video (PAL, NTSC Color or W/B): switchable Output format AES-EBU, SPDIF switchable Emphasis switchable ANALOG INPUTS 2 Type Transformer balanced Impedance > 10 kOhms Connectors 2 x XLR 3-pin female Maximum input level + 24 dBu Reference input level +15 dBu, +6 dBu, +4 dBu, 0 dBu, -10 dBu, defined by user: switchable SYNC- INPUTS 3 AES Type Transformer balanced Impedance 110 Ohms Connector XLR 3-pin female Wordclock Impedance 75 Ohms Connector BNC Video Impedance infiny or 75 Ohms Connector BNC DIGITAL OUTPUTS 3 AES Type Transformer balanced Impedance 110 Ohms Connector XLR 3-pin male SPDIF coaxial Type Transformer balanced Impedance 110 Ohms Connector RCA SPDIF optical Type optical, 660 nm Connector EIAJ RC-5720 Weight ~ 5 kg Dimensions 488 x 44 x 295 mm Mains input voltage 230/110 V ~ Specifications subject to change without notice. August 1999
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Copyright ?1999 J.P. Gurtner
Last revision: 08.09.1999