Bruce W. Ellis wrote in
:

The various automatic antenna tuner/matcher manufacturers list a
tuning range in Ohms - e.g., 6 - 1000 Ohms. The question I have is to
whether that value is the magnitude of the impedance (which correlates
to SWR) or the real part of the impedance (since the tuner should be
able to cancel out the reactive part of the impedance). W0BF

Bruce,

Where an impedance range is loosely specified as you quote (dimensioned in
ohms without identification of the R and X parts), and in the absence of
applicable frequency constraints and loss figures, I think you can safely
disregard the information as unprovable advertising hype.

It is intended to look technical, something to impress the new wave of hams
who don't have the understanding, and not enough to reliably determine the
suitability of the ATU to a specific application.

Owen