In case any of you guys have some idle cash lying around and need to upgrade your bench scope: http://www.edn.com/article/518976-33_GHz_100G_sample_sec_scope_claims_industry_s_best_accuracy.php Maybe the Elecraft K4 with the 1.8 Mhz to 1.2GHz A-to-D direct conversion frontend is not so far off after all. Mike W5FTD