Sander Smeenk (CistroN Medewerker) wrote:
> Quoting Robert Redelmeier ([EMAIL PROTECTED]):
>
> > > Try it! It might work!
> >
> > I did. CAS2 v CAS3 made no difference, but cutting out "spread
> > spectrum" did reduce my APIC errors about tenfold from 1/minute
> > to 5/hr. I guess I'll live with the greater EFI.
>
> Spread Spectrum is switched off in my setup too...
> Since I don't really know what it does..
My guess is that the clock freqency is then not completely the same
all the time. So instead of producing one sharp EMI peak at one
frequency it will sweep the whole area around that frequency.
This can reduce or increase the amount of interference that you care
about. (If the sharp peak falls at 66 +/- 0.1 and you want to listen
to the radio station at 65.5, there is no problem. But the spread peak
at 66 +/- 1 may interfere with your 65.6 MHz radio station. On the
other hand, if you're listening to the station at 66.0, you'll have
lots of trouble with the sharp peak at 66 +/- 0.1, but much less with
the broad peak 66 +/- 1.0.
A disadvantage could be that the clock period would be a bit shorter
every now and then, so I expect slightly more stability with it turned
off. But they MUST have thought about this, so there must be some
measures that they may have taken to prevent this from causing
trouble.
Roger.
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