174 Keysight InfiniiVision HD3-Series Oscilloscopes User's Guide
12 Acquisition Control
Remember though, for example: if the horizontal time per division control is set to
5 µs/div, and the Time Reference is set to Center, it will take at least 50 µs to fill all
ten divisions and re-arm. (That is 25 µs to capture pre-trigger data and 25 µs to
capture post-trigger data.)
Saving Data from Segmented Memory
You can save either the currently displayed segment (Save Segment - Current), or all
segments (Save Segment - All) in the following data formats: CSV, ASCII XY, and
BIN.
Be sure to set the Length control to capture enough points to accurately represent
the captured data. When the oscilloscope is busy saving multiple segments,
progress is displayed.
For more information, see "To save CSV, ASCII XY, or BIN data files" on page 264.
Digitizer Mode
Normally, when Digitizer mode is disabled, the oscilloscope's time per division
setting determines the sample rate and memory depth so as to fill the waveform
display with data while the oscilloscope is running (continuously making
acquisitions). For single acquisitions, the time/division setting still determines the
sample rate, but the maximum amount of acquisition memory is used.
In Digitizer mode, you choose the desired acquisition sample rate and memory
depth, and the time/div setting is adjusted, if necesssary, to fill the display with
data. The actual sample rate and memory depth used are displayed in the
Summary box in the right-side information area.
Digitizer mode primarily aids external software that controls and combines data
from multiple instruments.
To enable and use
Digitizer mode
1 Open the Acquire dialog box by selecting the sample rate and memory depth
(Acquire) badge or by choosing Setup > Acquire... from the main menu.
2 Select Manual.
Digitizer mode cannot be used along with these other oscilloscope features:
horizontal Zoom display, time references other than Center, segmented
memory, serial decode, digital channels, frequency response analysis, and
mask test. In most cases, enabling one of these features when Digitizer mode is
enabled will automatically disable Digitizer mode, and then disabling the
feature will automatically reenable Digitizer mode.
Digitizer mode requires the Normal acquisition mode and real-time sampling
(which is the default).
3 Select the Max Sample Rate field and turn the Entry knob or use the keypad
dialog box to enter the desired acquisition sample rate.
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