Tektronix TDS5054, User Manual

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Acquiring Waveforms
3- 36
TDS5000 Series User Manual
H
Interpolation (normal acquisition mode is used instead)
H
Vectors in equivalent-time sampling mode (waveforms are displayed as dots
instead)
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Saving nonactive waveforms
H
Math waveforms
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Measurements
Consider the mode you want to use to acquire data:
Automatic Selection. Fast Acquisitions automatically selects record length and
sample rate to optimize the displayed image by minimizing dead time. Fast
Acquisitions selects sample rates up to 1.25 GS/s and record lengths up to
1,000,000 points, and compresses them to 500 pixels to produce the maximum
display content.
Waveform Capture Rate.
Figures 3--14 and 3--15 illustrate how Fast Acquisitions
mode differs from the normal acquisition mode used by digital storage oscillo-
scopes. Note that normal mode follows a “capture waveform-digitize waveform-
update waveform memory-display waveform” cycle. Normal mode misses events
occurring during the long dead times. Typical waveform capture rates are
50 waveforms per second.
Fast Acquisitions display Normal DSO display
Figure 3- 14: Normal DSO and Fast Acquisitions displays
Using Fast Acquisitions