Please find enclosed a revised markup and "clean" second draft of the combination Touchstone 2.0 document for your review. The major changes are on pages 16 and 18. One technical issue remains: while data in the network parameters section must be arranged in order of increasing frequency, no such restriction exists in the text on noise parameters. I would suggest adding this. Comments and suggestions are welcome. - MM <<touchstone_spec2_combo_draft2_markup.pdf>> <<touchstone_spec2_combo_draft2.pdf>>