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
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