Istvan Nagy, Electronics Design Engineer at BlueChip Technology, a leading UK manufacturer of industrial computer and single board computer platforms, has written an in-depth tutorial on how to use Altium Designer for high-speed digital board design. This is a useful reference point for any engineer designing PCBs with proper signal integrity and timing using Altium.
You can download the tutorial at http://goo.gl/9VVBT. If you have any questions, please do not hesitate to email Istvan at inagy@bluechiptechnology.co.uk