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dCS 974 User Manual Manual for Software Version 1.0x
dCS Ltd May 2001
Manual part no: DOC1241121A1
Page 3
Document No: OS-MA-A0124-112.1A1
Contact
dCS
on + 44 1799 531 999 email to: more@dcsltd.co.uk
(inside the UK replace + 44 with 0) web site: www.dcsltd.co.uk
P
RODUCT
O
VERVIEW
The dCS 974 DDC (Digital to Digital Converter) is a high performance real time
sample rate and format converter, developed from our highly successful
dCS 972. It is designed for studio applications where source material is available
in one format, but outputs are required in other digital formats in real time. For
example, archives might be made for storage in 24/192 or 24/176.4 formats,
and then used to produce output in SACD, DVD, CD and other multimedia
formats. AES3, SPDIF, SDIF-2 and DSD formats are all supported, and multiple
units may be synchronised for stable multi-channel operation.
The unit is mains powered and is housed in a 2U (3.5”) high 19” rack mounting
case. It may be controlled either from its front panel, or from a software based
remote control running on a PC. Frequently used Setups may be stored and re-
called later. The last setting is automatically stored on power down, so that fixed
installations may be set up at leisure, installed and then left alone. Unauthorised
alterations to settings may be prevented by a “panel lock out” feature.
Numerous monitoring functions are provided – both for the audio signal and for
messaging attached to it. The unit has bit activity and level meters, and
message manipulation. CRC, parity and invalid errors may be monitored and
reported, so that “right first time” transfer to disc plants may easily be achieved.
The unit is highly software based, and more functions and features are added
from time to time. Software updates from dCS are free!
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Formats
• DSD at 2.822MS/s (see page 71)
• PCM from 192 kS/s down to 11.025 kS/s (see page 43)
• PCM data formats supported are: AES/EBU (XLR), Dual (2 wire) AES3
(XLR), Quad (4 wire) AES3 (XLR), SPDIF (Phono, Toslink and BNC) and
SDIF-2 (see page 70)
• DSD data formats supported are SDIF-2 (BNC), SDIF-3 (BNC) and DSD
Quad (4 wire - XLR)
Functions
• Sample Rate and Format Conversion (page 34)
• Multi-channel Sync capability (page 42)
• Bit for bit multiplex/de-multiplex mode (page 39)
• PCM to DSD, DSD to PCM
• DC Removal for DSD
• Multiple filters on many major sample rate conversions (page 45)
• Dither – 3 types (see page 47)
• Noise shaping – 10 different options on all major PCM sample rates (page
47).
• Output Level control with “Maximise” (page 48)
• Balance control (page 48).
• Digital Silence out with digital silence in (page 50)
Syncing
Comprehensive - can sync to Wordclock or AES reference, or signal, and sync
to video option available.
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free if we email them, and you download from a PC COM port. Low cost if you ask us for EPROMs or other
media - we charge for media and handling.