Don Bowey wrote:
On 6/14/05 2:28 AM, in article , "Floyd L.
Davidson" wrote:
I agree with your examples of DC power supplies and AC noise. Been there,
done that.
Defining how may angels can dance on a DC power cable without having to
redefine it is pointless, however. Everyone I knew in the telco industry
had good, workable terms for the cause of the need for filters, not only at
the FB, but at the equipment rack too; it was noise, trash, crap.
spikes....., but the 48V and 130V "power" were always DC and we knew the
noise had to be dealt with as AC riding the DC. No other esoteric, mindless
definitions are needed even though the terms AC and DC may be misnomers.
They are historic and work very well.
Exactly.
But look at all the people claiming it *isn't* AC! Very clearly
anyone who claims the various "noise, trash, crap, spikes" etc
are *not* AC, needs a reality check on their definition of AC.
On the other hand, while their definition and understanding of
it is clearly invalid, there is no lack of wide spread belief
that it is correct. Which I do find somewhat amazing...
--
Floyd L. Davidson http://web.newsguy.com/floyd_davidson
Ukpeagvik (Barrow, Alaska)