Interesting discussion. It appears that Fry is searching for a reason
to both questions as opposed to an solution. If so then that can hardly
be understood by simply debating alternative solutions.

I propose a non-technical explanation. There are two fundamental factors:

1 Instances are always contingent.
2 The velocity of radiation is not infinite.

Give this understanding then a solutions rest with the modeling and
analysis of the inter-dependancy of the DC levels which exist in a
realistic time domain.

What more need be said?

regards,

bill.


Richard Fry wrote:
Why would varying the pulse width without changing the characteristics of
the pulse transitions (rise/fall) affect the harmonic content of the pulse?
No bandwidth and no harmonics at all are produced by the constant DC level
of the pulse before and after each transition.

Wouldn't the harmonic structure and bandwidth needed to produce/reproduce a
pulse be related only to the rise and fall times of that pulse, and the
transition shapes (sin^2, etc), and be independent of the width (time)
between the transitions?

RF

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