4 connecting the system for dual aes, 5 using an external reference, Connecting the system for dual aes – DCS none User Manual

Page 8: Using an external reference

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dCS Scarlatti Clock User Manual

Software Issue 1.0x

June 2008



Filename: Scarlatti Clock Manual v1_0x.doc

Page 8

English version

Connecting the system for Dual AES

Owners with an Upsampler may prefer to use it to run the DAC at 176.4kS/s.

• If necessary, use the

FREQUENCY

button to set the Clock to

44.1kHz

.

• Connect one of the Clock outputs to the Word Clock inputs of the transport, the Upsampler and the

DAC.

• Connect an AES cable between the transport’s AES output and the Upsampler’s AES input, select

that input.

• Set the Upsampler to

176.4kS/s

.

• Connect the Upsampler’s

AES1

&

2

outputs to the DAC’s

AES1

&

2

inputs and select the DAC’s

Dual AES

input. (It may be necessary to turn Dual AES mode on in the menu.)

• The transport will automatically slave to the Clock and display

Sync

.

• Set the Upsampler to sync to the external word clock.

• Use the DAC’s

SYNC

button to set it to

WClk

.

• Connect the DAC’s

Analogue Outputs

to a power amplifier or preamplifier.

• Set the DAC

Volume

control to a suitable level and play a disc.

• Set the Clock’s

DITHER

feature on or off as you prefer.

Using an External Reference

If you have a GPS receiver or an atomic clock with a 10MHz output, you can lock the Scarlatti Clock to
it. These sources are even more accurate than the Scarlatti Clock, but note that low jitter and stability
are more important than absolute accuracy.

• Connect your system for DSD or Dual AES as you prefer.

• Use another BNC cable to connect the 10MHz output from the external reference to the Scarlatti

Clock‘s

Ref In

connector.

• Open the Clock’s menu and set the

Coupling

menu page to

Bipolar

. The Clock should lock to the

external reference and display

Sync

.

• Set the DAC

Volume

control to a suitable level and play a disc.

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