The MECL System Design Handbook is a great reference and covers many topics. One topic covered is transmission line theory, reflections, and lattice diagrams. Lattice diagrams are used to calculate ...
Schematics.com is a new, free website that offers an on-line schematic entry tool. There’s not much new about that, except that designs on this new site are made freely available to the public.
Prioritize clarity over completeness in system diagrams.