Just so I can get my thinking straight -- Does a slotted line measure
VSWR?
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No! A slotted line cannot measure VSWR.

But the VSWR on a slotted line can be measured. That is what it is there
for. The slot allows access by a probe to the inner conductor.

It does not allow or facillitate the measurement of VSWR on any line other
than on itself.

It is primarily used to make impedance measurements of R+jX etc in a
standards laboratory. The Ohmic Standard is the characteristic impedance,
Zo, of its own internal transmission line. Very accurate and stable.
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