In Reply to: LK, no response to this data? (nt) posted by Allen Wright on November 4, 2005 at 02:13:41:
... capacitance coupling as the cause.
Surely quite a lot of energy would be involved. Would'nt all that RF flying about effect other circuits?Could there be other causes for the poor spectrum of XO-2 in the SCD-777ES? I think the clue is that it performed so well on the bench. A bad ground (I dont mean poor joint) but one that is carrying return currents other than XO-2's could do it.
Another cause could be excessive line reflections in the XO-2 out to player clock in lead. Such reflections do generate spectra.
The square wave will grow overshoot(s) and undershoots.
These look "vaguely" sine 'ish on a scope and would exactly account for the spurii and very noisy sidebands you observed with XO-2 fitted and its clean o/p on the bench.Add to this the phenomenon of possible resonance, if the clock drive wire is a sub mutiple of 45Mhz wavelength, and things would get even worse!
In each case a re-installation should effect a cure.
Cheers!!
lovekylie
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Follow Ups
- I find it hard to envisage... - lovekylie 10:09:42 11/04/05 (4)
- In each case a re-installation should effect a cure" - Allen Wright 13:05:55 11/04/05 (3)
- Perhaps you are missing the point here... - lovekylie 14:16:02 11/04/05 (2)
- Re: Perhaps you are missing the point here... - Allen Wright 09:03:29 11/06/05 (1)
- Re: Perhaps you are missing the point here... - lovekylie 11:52:38 11/07/05 (0)