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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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- Re: LK, no response to this data? (nt) - lovekylie 10:08:33 11/04/05 (0)
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