User`s guide

54 5000 Series Oscilloscope User’s Guide
2 Front-Panel Controls
• When you press the Run/Stop key again, it illuminates in red,
and the oscilloscope is stopped.
“Stop” is displayed in the trigger mode position in the status
line at the top of the display. You can pan and zoom the
stored waveform by turning the horizontal and vertical
control knobs.
• When controlling the oscilloscope through its Web interface
(see Remote Front Panel on page 29) select Run Control from
the Main Menu or press ctrl+R for run/stop or ctrl+S for
single.
When the oscilloscope is running and you press the Run/Stop
key, it will flash until the current acquisition is completed. If the
acquisition completes immediately, the Run/Stop key will not
flash.
At slower sweep speeds, you may not want to wait for the
acquisition to finish. Just press Run/Stop again. The acquisition
will stop immediately and a partial waveform will be displayed.
You can display the results of multiple acquisitions using
infinite persistence. See “Infinite persistence” on page 205.
Memory Depth/Record Length
Run/Stop versus Single
When the oscilloscope is running, the trigger processing and update rate are
optimized over the memory depth.
Single
Single acquisitions always use the maximum memory available—at least twice as
much memory as acquisitions captured in Run mode—and the oscilloscope
stores at least twice as many samples. At slow sweep speeds, the oscilloscope
operates at a higher sample rate when Single is used to capture an acquisition
due to the increased memory available. To acquire data with the longest possible
record length, press the Single key.
Running
When running, versus taking a single acquisition, the memory is divided in half.
This allows the acquisition system to acquire one record while processing the
previous acquisition, dramatically improving the number of waveforms per second
processed by the oscilloscope. While running, maximizing the rate at which
waveforms are drawn on the display provides the best picture of your input signal.