Thank you, that is consistent with the analyzer. The smith chart program
is in error.

The analyzer also shows the response of an open coax to follow the same
circle at the edge of the chart. Is this accurate? The analyzer does not
correct for length, is this a result of that?

- Dan

Cecil Moore wrote:
dansawyeror wrote:
Why are these different? What above is incorrect?

The horizontal center line on a Smith Chart is resistive.
The outside circle on a Smith Chart is reactive. A
capacitor is almost purely reactive. The reactance is
1/(2*pi*f*c) That value will always fall on the
outside circle of the Smith Chart. If the capacitor
has a reactance of 0-j50 ohms, it will be located on
the outside circle at the very bottom of the Smith
Chart normalized to a 0-j1.0 value.