dCS 974 User Manual

Manual for Software Version 1.0x

dCS Ltd

May 2001

 

 

Sample Rate Conversion / Format Conversion Submenu

The Sample Rate Conversion menu is as follows:

Audio Input Select

Select the required input from the list and press Set. The Dual AES option requires that the Input Sample Rate be set to 192 kS/s, 176.4 kS/s, 96 kS/s or

88.2kS/s. The Quad AES option requires that the Input Sample Rate be set to

192 kS/s or 176.4 kS/s. The DSD setting automatically identifies DSD SDIF-2 or DSD SDIF-3 data on the DSD/SDIF input.

Sync Source

Select a source to synchronise to from the list and press Set. The available sync sources are:

Audio Input

Syncs to the selected input source – this is the

 

normal setting.

AES Loop

Syncs to the AES Ref Loop In, leaving the

 

reference unterminated to allow daisy-chain

 

connection through Loop Out to another device.

AES Loop Term

Syncs to the AES Ref Loop In and terminates the

 

reference source.

Wordclock

Syncs to DSD/SDIF WCLK IN (in the upper group

 

of connectors).

Internal

Syncs to the dCS 974’s internal clock.

Lab Ref

Syncs to a 10 MHz signal into DSD/SDIF CLK IN

 

(in the upper group of connectors).

For best results, synchronise to the Audio Input or a master clock on one of the clock/reference inputs that is also driving the source. For DSD/SDIF inputs, you can still sync to Audio Input as the unit will automatically sync to DSD/SDIF WCLK IN. For DSD in SDIF-2 or SDIF-3 mode, a Wordclock must be used – contact dCS if you need a Bit Clock.

The Lab Ref setting allows use of a GPS reference - if you use this, make sure other parts of your system are also GPS sync’d.

Only select Internal sync if you are using the unit as a signal generator or a reference clock source.

Manual part no: DOC1241121A1

Page 41

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