Re: 3 dB bandwidth

In article <11boec4bl5ab1df@xxxxxxxxxxxxxxxxxx>,
_see.web.page_@xxxxxxxxxxxxxxxxxx says...
>
>
>
> Keith Williams wrote:
>
> >> Given the repeated basic errors that the poster in question has made,
> >> I was not sure whether he meant voltage when he wrote "potential"
> >> Thus my usage of "appears to be." One can't be too careful when dealing
> >> with the ineducable; sometimes they appear to make sense when actually
> >> they are simply lacking the vocabulary to express their ignorance.
> >
> >What does "impedance matching" or "maximum power transfer" mean to you?
> >Hint: It's a R/R+R voltage divider.
>
> I would agree if the statement was made by a "normal" person, but I
> have found that the ineducable can, by random chance, stumble on to
> the correct terminology without having any real understanding. Thus
> my usage of "appears to be."

Do you often talk about yourself?
>
> >> >Do you have a problem calculating 20log(.5)?
> >>
> >> Nope. Do *you* have a problem calculating 10log(.5)?
> >
> >Well, a *voltage* divider divides, um, voltage. Thus 20log(.5) or 6dB.
>
> Decibels are units of power, not voltage.

Nonsense! Decibels are dimensionless. Watts/watts is dimensionless,
as is Volts/volts, or SPL/SPL. Decibels is simply a log-scaled ratio
of two quantities. It's useful because many things in nature are log-
scaled.

> >> "bel (B): A unit of measure of ratios of power levels, i.e., relative
> >> power levels. Note 1: The number of bels for a given ratio of power
> >> levels is calculated by taking the logarithm, to the base 10, of
> >> the ratio. Mathematically, the number of bels is calculated as
> >> B = log10(P 1/P 2) where P 1 and P 2 are power levels. Note 2: The
> >> dB, equal to 0.1 B, is a more commonly used unit."
> >> Source: http://www.atis.org/tg2k/_bel.html
> >
> >Wow, you know how to use Google. Now try learning something about
> >electronics.
>
> The children who played with Mattel's best selling new toy for the
> year 2000 and the pilots who fly airlanes tested with my AV-8B Harrier
> actuator test system seem to be satisfied with my abilities.

That is scary.

> I deleted the rest of whatever you had to say unread. My time is too
> valuable to waste on someone who thinks that personal attacks are a
> substitute for a civil discussion of the topic at hand.

I see. You're too stupid to be educated. ...too stubborn to read.

> *plonk*

Oh no! I've been plonked! What will I do? ...better plonk all the
rest of the engineers here too.

BTW, your followup-to alt.dev.null didn't work. What a candy-assed
loser!

--
Keith
.

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