702 / | HD | DATA PROCESSING: MEASURING, CALIBRATING, OR TESTING |
1 | DF | MEASUREMENT SYSTEM IN A SPECIFIC ENVIRONMENT {6} |
57 | DF | .~ Electrical signal parameter measurement system {6} |
66 | DF | .~.~ Waveform analysis {5} |
67 | .~.~.~ Display of waveform {1} | |
68 | DF | .~.~.~.~> Having specified user interface (e.g., marker, menu) |