| 摘要 |
A signal scaling system and methodology for use in a signal measurement system such as a digital or analog oscilloscope, logic analyzer, network analyzer, spectrum analyzer or waveform generator that has a graphical user interface which controls a waveform display region on a display device. The signal scaling system determines one or more displayed waveform scaling parameters to cause portions of selected displayed waveforms appearing within a rescaling rectangle to occupy a predetermined portion of the waveform display region other than the rescaling rectangle. For each of the selected displayed waveforms, the scaling parameters may include horizontal scaling, horizontal offset, vertical scaling and vertical offset. Preferably, the predetermined portion of the waveform display region comprises the entire waveform display region and the selected displayed waveforms include all waveforms at least partially within the rescaling rectangle. The displayed waveforms may include signal waveforms, function waveforms, and memory waveforms and the signal measurement system is preferably a digital oscilloscope. The signal scaling system includes an resealing rectangle specification unit for outlining an resealing rectangle on the waveform display region between user-specified start and end points. A scaling computation unit calculates the displayed waveform scaling parameters based upon specifications of the rescaling rectangle generated by the rescaling rectangle specification unit and current scaling parameters generated by the signal measurement system.
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