Wadia Digital 861 manual Wadia, Compact Disc Player

Wadia 861 COMPACT DISC PLAYER

USING CLOCKLINK WITH AN EXTERNAL DIGITAL PROCESSOR

Theory of Operation ClockLink eliminates jitter added when the clock signal is recovered from the digital data stream. In a non-ClockLink system, jitter is added when the clock signal is embedded in the data stream and transmitted to the DAC. When the clock signal is recovered from the data stream (as shown below), and used to clock the DAC output, this jitter degrades the sonic performance.

Data and Clock to DAC
Transport	DAC
Jitter added
Conventional CD Player

With ClockLink, the clock is not recovered from the data. Instead,

the master clock is located at the DAC. This clock signal is transmitted to the transport to keep it synchronized with the DAC. Because the recovered clock is ignored, any jitter on that signal does not affect the sonic performance.

	Data to DAC
Transport	DAC
	Clock to Transport
	CD Player with ClockLink

The Wadia 861 with its digital inputs and outputs can be used with a digital signal processor such as a digital equalizer. Digital processors allow the signal to be modified without adding analog noise and distortion. However, digital processors can add jitter, as shown below, causing noticeable sonic degradation.

	Digital	Data and Clock to DAC
Digital	Processor	Jitter added	Digital
Output			Input

Transport

DAC

Conventional CD Player

Using ClockLink with an external processor, the Wadia 861 ignores the incoming clock and uses the master oscillator at the DAC. As a result, jitter added by the external digital processor does not affect sonic performance.

Digital	Data to DAC
Processor
Digital	Digital
Output	Input
Transport	DAC
	Clock to Transport
Wadia 861

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