Ian White G/GM3SEK wrote:
The Bird does not generate a vector cross product. There is nothing
inside the instrument that's capable of doing such a thing.

Didn't say it did, Ian. Using valid assumptions like E/H=Z0
and E-field forward + E-field reflected = E-field total,
the multiplication is performed by a combination of phasor
addition, linear addition, and non-linear scaling. It is
an analog calculator.

The hardware displays readings of detected RF voltages - not power. The
forward/reflected power calibration on the meter scale is an external
calculation, based on transmission line theory.

Yes, based on samples of a voltage proportional to the E-field
and samples of a current proportional to the H-field. Given the
basic assumptions of the Bird, it can be proven mathematically
that the Bird is displaying E-field x H-field for forward power
if the slug arrow is pointed in the forward direction and
displaying E-field x H-field for reflected power if the slug
arrow is pointed in the reflected direction.

You know exactly how instruments like the Bird work, because at various
times you have posted accurate descriptions here. Your enthusiasm for
your pet theory is making you distort the truth.

The Poynting Vector is ***NOT*** my pet theory, Ian, it is
mainstream RF engineering.

All I am saying is that the Bird samples a voltage proportional
to the E-field and samples a current proportional to the H-field.
It then performs analog calculations on those parameters.
If you think you can disprove that statement, be my guest.
--
73, Cecil http://www.qsl.net/w5dxp


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