Cecil Moore wrote:
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.

As you begin to admit when challenged, the instrument itself does
nothing but add or subtract RF voltages derived by sampling the line
voltage and current. No multiplication is involved.

The calibration to indicate power is performed ENTIRELY on the meter
scale. But the instrument didn't do the multiplication or the I^2R
calculation, so it didn't actually measure power.

It is
an analog calculator.

No, it isn't. The guy who drew the meter scale did the power
calculation. The instrument itself is incapable of multiplying anything.


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.

Ah, the old bait and switch trick.

In your earlier statement you said it "performs multiplication", which
is totally false. But for your final paragraph you've switched it to
"analog calculations", which is more general and thus partly true; and
then you invite me to disprove that.

Cecil, I don't think you even realise you're pulling these dishonest
debating tricks... but after too many years to count, I just don't have
any more time for them.

plonk



--
73 from Ian G/GM3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek