On-screen tools for eye diagram measurements

摘要: Once an eye diagram measurement (11) is begun and there (13) displayed, different on-screen tools may be used singly, or in combination. Each involves indicating with cursors line segments regions of the that are interest, a parameter parameters associated each tool use reported (usually) separate area (15) display. An Eye Limits (20,21,22,26) allows specification point within diagram, whereupon it finds reports coordinates first encountered along horizontal vertical lines extended from selected (i.e., "eye opening" size). The itself also reported. A Four Point Box (36a,36b,38) construction on rectangle having sides parallel to coordinate axes diagram. reported, as well information about number points occur rectangle. Six (52,53) Diamond (63) defined like fashion. Slope Tool (68,72,76) uses two end define intervening segment, whose slope location can adjusted match some region interest pertinent segment its then Histogram (83,91,97,85,92,98) performed any slice (80,89,95) histogram thus distribution hits versus either time axis at fixed voltage, voltage location. Duplicate appear both defining histogram. Either cursor grabbed moved, which moves other. scale for linear logarithmic.