Patent ID: 6917889

Claim:
A test and measurement instrument, comprising: an acquisition unit for acquiring samples of a signal from a device under test; a first memory for storing said signal samples; a second memory for storing a timestamp associated with said signal samples; a digital signal processing unit for processing said signal samples to produce a source waveform for display; and a controller for controlling said acquisition unit, said digital signal processing unit, and said display unit; wherein, said digital signal processing unit performs measurements on said source waveform with regard to a predetermined property or event; said digital signal processing unit using said measurements to produce a measurement waveform for display; said controller causing said display to display first and second indicia correlating a position in said measurement waveform to an area on said source waveform where said measurement was taken; said correlation being performed in response to said stored signal samples and said stored time stamps; said correlation being performed when said source waveform and said measurement waveform share a common horizontal time axis, or when said source waveform and said measurement waveform do not share a common horizontal time axis.