Hello all:
"i4jmy@iol.it" escribió:
>
> ---------- Initial Header -----------
>
> >From : amps-admin@contesting.com
> To : amps@contesting.com
> Cc :
> Date : Tue, 21 May 2002 13:43:47 +0000
> Subject : Re: [Amps] Non-linear subharmonics was: Nonsense, AL-
> 1500 parasitic
>
> > Here's a message received from a guy I knew at university aeons ago. H
> e reads
> > the archives but is not a subscriber. I'm not sending it because it ca
> rries
> > any personal baggage for me but because it's an input from a highly qu
> alified
> > and very experienced rf engineer.
> >
> > Steve
>
> Sirs, nobody ever told that's impossible to generate anything, but sub
> harmonic is totally nonsensical and diseducative.
> Spurs, this is the term, not subharmonics.
Maybe it is "how is called" a nonlinear unwanted effect, which result
in an F/2 frequency generation, as referenced by Mr. Thompson in a prior
message.
I agree with Mauri, it is a spurious response.
> An harmonic is an integral multiple of the fundamental frequency while
> a subharmonic is not an integral divisio of the fundamental, it doesn't
> exist.
> Please would an engineer explain (remember what he studied) what's a
> fundamental and what's an harmonic ?
It is like the term "first harmonic"... :)
Best regards
Guillermo - LU8EYW.
|