DCS dCS 974, Digital to Digital Converter Multi-channelSample Rate Conversion – with more alignment tolerance

dCS 974 User Manual	Manual for Software Version 1.0x
dCS Ltd	May 2001

Multi-channel Sample Rate Conversion – with more alignment tolerance

WORDCLOCKS

TO SOURCES

	AES 1	AES 2	AES 3	AES 4
more@dcsltd.co.uk	AES/EBU Outputs			Wordclock Outputs

1

7

							dCS 992 Master Clock
	3	4	5	6		In	Mains Fuse (2AT) On Off
					External	Loop	Remote
8	9	10	11	12	Sync
						Out

A

							C
	AES / EBU INPUTS			AES / EBU REFERENCE LOOP		SPDIF
PUSH	PUSH	PUSH	PUSH	PUSH	IN		OUT
						RCA	SDIF/
AES 1	AES 2	AES 3	AES 4	IN	OUT
				AES CLK OUT	SYNC INPUT	BNC	DSD
FROM						TOS
SOURCE	AES / EBU OUTPUTS
	AES / EBU INPUTS			AES / EBU REFERENCE LOOP		SPDIF
PUSH	PUSH	PUSH	PUSH	PUSH	IN		OUT
						RCA	SDIF/
AES 1	AES 2	AES 3	AES 4	IN	OUT
				AES CLK OUT	SYNC INPUT	BNC	DSD
						TOS
	AES / EBU OUTPUTS
	AES / EBU INPUTS			AES / EBU REFERENCE LOOP		SPDIF
PUSH	PUSH	PUSH	PUSH	PUSH	IN		OUT
						RCA	SDIF/
AES 1	AES 2	AES 3	AES 4	IN	OUT
				AES CLK OUT	SYNC INPUT	BNC	DSD
FROM						TOS
SOURCE	AES / EBU OUTPUTS
	AES / EBU INPUTS			AES / EBU REFERENCE LOOP		SPDIF
PUSH	PUSH	PUSH	PUSH	PUSH	IN		OUT
						RCA	SDIF/
AES 1	AES 2	AES 3	AES 4	IN	OUT
				AES CLK OUT	SYNC INPUT	BNC	DSD

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
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
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
CH1 IN	CH2 IN	REMOTE
		IN
WCLK IN	LOOP OUT
		LOOP
		OUT
CH1 OUT	CH2 OUT

96kS/s Ch1 & 2

96kS/s

Ch3 & 4

96kS/s Ch5 & 6

96kS/s Ch7 & 8

Figure 15 – Multi-channel Sample Rate Conversion with more alignment tolerance

AdCS 992 Master Clock5 can also be used to sync the source and the dCS 974 units as above. In addition to the sync link cabling (starting with “A”), additional clocking (cables “C”) allow the dCS 974‘s to extract clocks from the “C” cables and extract the data from the signal input cables. The master clock outputs different frequencies on the different cabling types. This allows considerable bit alignment error, as might occur if some tracks are stored on one machine and some on another. For all dCS 974 units, set the Sync Source to Wordclock and the Multiple Channel Sync option to On. They will all set up as slaves. Make sure that all the other settings are the same on each unit. Note that cable ‘A’ must NOT be driven from the dCS 992’s AES1 output.

5version 2.0 or higher software

Manual part no: DOC1241121A1 Page 31 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