User manual

WaveSurfer 3000/3000z Oscilloscopes Operator's Manual

Set Reference Clock

By default, the oscilloscope is set to use its internal clock of 10 MHz as the Timebase reference to

synchronize acquisition across all channels.

You can opt to use an external reference clock for this purpose. Connect the clock source to the REF IN

input on the back I/O panel of the oscilloscope using a BNC cable. Then, go to Timebase > Timebase

Setup > Reference Clock tab and choose External.

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.

Oscilloscope in History mode.