Agilent Technologies 4000 X-Series User Manual page 214

12
Acquisition Control
To display the results of multiple acquisitions, use persistence. See
or clear persistence"
Single vs.
The maximum data record length is greater for a single acquisition than
Running and
when the oscilloscope is running (or when the oscilloscope is stopped
Record Length
after running):
• Single — Single acquisitions always use the maximum memory available
• Running — When running (versus taking a single acquisition), the
To acquire data with the longest possible record length, press the [Single]
key.
For more information on settings that affect record length, see
Control"
214
The [Single] run control lets you view single- shot events without
subsequent waveform data overwriting the display. Use [Single] when
you want maximum memory depth for pan and zoom.
When you press [Single], the trigger mode is temporarily set to Normal
(to keep the oscilloscope from auto- triggering immediately), the trigger
circuitry is armed, the [Single] key is illuminated, and the oscilloscope
waits until a trigger condition occurs before it displays a waveform.
When the oscilloscope triggers, the single acquisition is displayed and
the oscilloscope is stopped (the [Run/Stop] key is illuminated in red).
Press [Single] again to acquire another waveform.
If the oscilloscope doesn't trigger, you can press the [Force Trigger] key to
trigger on anything and make a single acquisition.
on page 151.
— at least twice as much memory as acquisitions captured when
running — and the oscilloscope stores at least twice as many samples.
At slower time/div settings, because there is more memory available for
a single acquisition, the acquisition has a higher effective sample rate.
memory is divided in half. This lets the acquisition system acquire one
record while processing the previous acquisition, dramatically improving
the number of waveforms per second processed by the oscilloscope.
When running, a high waveform update rate provides the best
representation of your input signal.
on page 314.
Agilent InfiniiVision 4000 X-Series Oscilloscopes User's Guide
"To set
"Length