Time Stamp/Trigger Marker

Time Stamp

The time stamp displayed at the lower left corner of the Oscilloscope view represents the time (with accuracy in minisecond) of the first data point (i.e. leftmost data point) of the current frame of data. For most of cases, the two channels of data are sampled at the same time and thus only one time stamp is displayed. However, there are cases whereby Channel A is used for live input and Channel B is fed by the Signal Generator directly at software level (refer to the manual of Signal Generator). In these cases, the time stamp for Channel A will be displayed and on its right hand side, the time difference between Channel A and Channel B will also be displayed, with accuracy of one sampling interval between the raw data. A negative value of the time difference means that the data of Channel B arrives earlier than that of Channel A.

Trigger Marker

Two markers will be displayed in the oscilloscope view to reflect the trigger parameters. One marker will be displayed on the left vertical axis to reflect the current Trigger Level (by the location of the marker on the vertical axis), Trigger Edge (by the arrow direction of the marker) and Trigger Source (by the color of the marker). The other marker will be displayed on the horizontal axis on the top to reflect the Trigger Delay (by the location of the marker on the horizontal axis) as well as the Trigger Source (by the color of the marker). Only negative Trigger Delay can be displayed. The trigger position can be found at the intercept of the two markers.

These markers are displayed only in one type of view: waveform display of Channel A and Channel B. They will not be displayed when Trigger Edge is “JP” or “DF”.