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When measuring THD we don't care much where distortion is generated and
why. That's is infact a manufacturer (or owner) problem to be solved in
the case the overall THD is too high and concurrence does better or
neghbours HAM "blame" at you (and you care) if you leave your
transmission as is.
As well as for THD, if we can finally measure what's the final
transient intermodulation distortion we have available an objective
number that evaluates the produced effect of keying.
What eventually has to be modified, is again a question that comes
after it has been established that there is something bad to fix.
73,
Mauri I4JMY
> ---------- Initial message -----------
>
> From : Pete Smith <n4zr@contesting.com>
> To : "i4jmy@iol.it"<i4jmy@iol.it>
> Cc : cq-contest@contesting.com
> Date : Thu, 08 Mar 2001 09:33:16 -0500
> Subject : Re: [CQ-Contest] Clicks
>
> At 03:00 PM 3/8/01 +0100, i4jmy@iol.it wrote:
> >I think the parameter to be measured is called TIM (Transient
> >Intermodulation Distortion) and surely it has an accepted method to
be
> >evaluated as well as the IMD or THD have.
>
> Even for CW clicks? Also, some people have suggested that in modern
radios
> this phenomenon may not be related to RF envelope rise-time, but
rather to
> anomalous synthesizer behavior. Any thoughts about the validity of
this
> line of thought?
>
> 73, Pete N4ZR
> Contesting is!
>
> The World Contest Station Database
> is waiting for your input at
> http://www.qsl.net/n4zr
>
>
>
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