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Slink-e / CDJ Discussion Archive #7

Re: Redux: DXS Setup

Posted By: Colby Boles <cboles@n...>
Date: 1/23/00 4:15pm

In Response To: Re: Redux: DXS Setup (Gautam Desai)

Unfortunately, this won't work. Inevitably, you will have to switch to a particular input when you want to use it. The problem isn't that the signal drops out when the DXS switched - it switches very fast (~10ns) - the problem is that each signal has a slightly different sampling frequency and has data packets which are out of phase with your previous signal. When you switch from one signal to another, you end up with a couple of possibilities:

1) loosing synchronization with sampling clock 2) getting a coding violation / CRC error due to a change in data in mid-packet

To avoid this you would have to buffer data and make a gradual transition from one sampling rate and word clock phase to another - which would be difficult and expensive.

Colby

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