On Sat, 15 Oct 2005 18:25:02 GMT, Cecil Moore wrote:
a calibration cap which has no effect at all on the *physical* reference Z0.

If it had an effect, the Z would change, wouldn't it? The cap has a
Z, that much is sure. The purpose of the cap is not what you ascribe
to it - but that is par for the course as this inclusion quoted above
has no meaning either in or out of context.