dCS 974 User Manual

Manual for Software Version 1.0x

dCS Ltd

May 2001

 

 

General Sample Rate Conversion and Distribution

From ANY format: AES, SPDIF, Toslink, SDIF-2 at ANY sample rate: 11.025k, 12k, 16k, 22.05k, 24k, 32k, 44.1k, 48k, 88.2k or 96kS/s

or

Dual AES at 88.2k, 96k, 176.4k or 192kS/s

or

Quad AES at 176.4 or 192kS/s

or

DSD SDIF-2, DSD SDIF-3 or DSD Quad

 

AES / EBU INPUTS

 

AES / EBU REFERENCE LOOP

SPDIF

PUSH

PUSH

PUSH

PUSH

PUSH

IN

OUT

 

 

 

 

 

 

 

 

 

 

 

RCA

 

 

 

 

IN

OUT

 

AES 1

AES 2

AES 3

AES 4

AES CLK OUT

SYNC INPUT

BNC

 

 

 

 

 

 

 

 

 

 

TOS

DSD / SDIF

CH1 IN

CH2 IN

REMOTE

 

 

IN

WCLK IN

LOOP OUT

 

 

 

LOOP

 

 

OUT

CH1 OUT

CH2 OUT

MAINS FUSE (2AT) ON OFF

 

 

LOOP IN

WCLK OUT

 

AES / EBU OUTPUTS

To ALL formats: AES, SPDIF, Toslink & SDIF-2 at ANY sample rate: 11.025k, 12k, 16k, 22.05k, 24k, 32k, 44.1k, 48k, 88.2k or 96kS/s or

Dual AES at 88.2k, 96k, 176.4k or 192kS/s

or

Quad AES at 176.4 or 192kS/s

or

DSD SDIF-2, DSD SDIF-3 or DSD Quad

Figure 9 – General Sample Rate Conversion

The dCS 974 converts any one of 12 sample rates in any format to any of the 12 sample rates in ALL formats: 4 AES, 2 electrical SPDIF, optical SPDIF or SDIF-2 outputs. Most frequency combinations (including all the primary ones) are accommodated in one pass - see Table 2 on page 44. For best results, slave the unit to the audio input, AES Ref Loop In or the SDIF-2 WCLK IN.

do this: Connect any digital audio source of any word length between 8 and 24 bits, using single AES or dual AES or quad AES to the AES inputs, or using single or double speed SDIF-2 to the SDIF-2 inputs, or using single wire SPDIF to the appropriate SPDIF input.

do this: Select Audio Input accordingly. Output via any of the outputs.

Sample Rate Conversion settings:

Sample Rate Conversion:

On

Audio Input Select:

Any, including Dual AES if the Input Sample

 

Rate is 88.2kS/s or more and Quad AES if the

 

Input Sample Rate is 176.4 kS/s3 or 192kS/s.

Output Mode:

Normal or Dual AES may be selected if the

 

Output Sample Rate is 88.2 kS/s or 96kS/s.

 

Dual AES or Quad AES must be used for

 

192 kS/s or 176.4 kS/s.

Other settings:

Any.

3It has to be Dual AES or Quad AES for 192 kS/s or 176.4 kS/s

Manual part no: DOC1241121A1

Page 25

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