[Amps] Re: [Amps] Nonsense

[i4jmy@iol.it]

Hi leon,

sorry, to point it out but your sarcastical reply and the hetherodine 
example doesn't fit.

Take a simple oscillation (any kind) and explain us how a sub harmonic 
oscillation of can be produced by the fundamental.
If you can, then is the day I learn something new.
Until that moment I stay and insist.

Harmonic:
1 : OVERTONE; especially : one whose vibration frequency is an integral 
multiple of that of the fundamental b : a flutelike tone produced on a 
stringed instrument by touching a vibrating string at a nodal point
2 : a component frequency of a complex wave (as of electromagnetic 
energy) that is an integral multiple of the fundamental frequency

In the Hetherodyne (super and infra) of two signals, 6 and 8 in your 
example, 2 is not a sub-harmonic likewise 14 is an not an harmonic, 
they are the well known amplitude modulation products of two carrier 
signals.

73,
Mauri I4JMY


---------- Initial Header -----------
 
>From    : amps-admin@contesting.com
To      : " AMPS" <amps@contesting.com>
Cc      : 
Date    : Thu, 16 May 2002 07:29:51 -0500
Subject : Re: [Amps] Nonsense

> OM:
> 
> I don't have a dog in this fight and don't desire to pick an argument.
> 
> Before you identify something as non-sense have you considered the
> following?  Lets assume we have two signals going into a heterodyning
> mixer stage and the two frequencies are 6 MHz and 8MHz.  On the output
> of that mixer one could expect to find 4 signals, not two signals.
> That is the two fundamental signals of 6 MHz and 8 MHz as well as the
> sum frequency and the difference frequency of the two applied signals
> or 2 MHz and 14 MHz.
> 
> You will note that 2, 6, 8, 14 are even multiples or harmonically
> related to a specific integer.  I don't know what you would call it
> unless you called it harmonics (higher and sub).  Perhaps the
> engineering school I attended was wrong and the professors didn't know
> what they were talking about.  I learn something new every day so
> perhaps this is it for this day.  Thanks for enlightening me.
> 
> 73,
> Leon  W5NA