Again, the typical SWR meters we use do *not* measure the SWR on any
transmission line, except (indirectly) the SWR on the short line within
the instrument -- if it even contains such a line, which some don't. I
don't know of any way to directly measure the SWR on an intact coaxial
line, only on a slotted line.

The SWR on a coax line can readily be calculated, however, from
measurements it is possible to make.

Roy Lewallen, W7EL