History Mode - Teledyne HDO9000 Operator's Manual

HDO9000 High Definition Oscilloscopes Operator's Manual

History Mode

History Mode allows you to review any acquisition saved in the history buffer, which automatically
stores all acquisition records until full. Not only can individual acquisitions be restored to the grid,
you can "scroll" backward and forward through the history at varying speeds to capture individual
details or changes in the waveforms over time.
Each record is indexed and time-stamped, and you can choose to view the absolute time of
acquisition or the time relative to when you entered History Mode. In the latter case, the last
acquisition is time zero, and all others are stamped with a negative time. The maximum number of
records stored depends on your acquisition settings and the total available memory.
Press the front panel History Mode button, or choose Timebase > History Mode to access this
feature.
Entering History Mode automatically stops new acquisitions. To leave History Mode, press the
History Mode button again, or restart acquisition by pressing one of the front panel Trigger Mode
buttons.
Note: History Mode does not work with Sequence Mode acquisitions, pre-processor
Interpolation set on the input channel, or channel interleaving.
56
Oscilloscope in History mode.