By Ian Darney

The article ‘The Virtual Conductor’ derived a theoretical basis for a circuit model which simulated the coupling between a cable and the environment. This article shows how values can be assigned to the components of that model.

A set of tests is described which measure the characteristics of a 15 metre length of twin-conductor cable. The data is then used to create a model which replicates the response of the hardware. It shows how both antenna-mode radiation and differential-mode radiation can be identified and measured. Full details of the process are provided.