Tektronix TDS5054, Руководство пользователя

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Acquiring Waveforms
3- 20
TDS5000 Series User Manual
NOTE
. As implied from the operation just described, Resolution and the
equivalent elements, Sample Interval and Sample Rate, are derived and cannot
be set directly. You can, however, check the Resolution at anytime in the
resolution readout. Also note that the front-panel RESOLUTION knob actually
adjusts the Record Length to increase sample density.
The previous discussion also assumes that Horizontal Scale is held constant. You
can hold the Sample Rate constant instead by clicking Hold Sample Rate
constant on the Record Length tab of the User Preferences control window.
Independent vs. Shared Window.
The oscilloscope applies the same horizontal
acquisition window to all channels from which it acquires data. Unlike the
vertical acquisition window that you size and offset independently for each
channel, the same time/div, resolution (record length), and horizontal position
(from the same trigger point) apply to all channels simultaneously. One trigger,
from a single trigger source, will locate a common horizontal acquisition
window for all active channels, which you can shift in parallel by setting the
horizontal position control. See Figure 3--6.
Ch4 record
Ch3 record
Ch2 record
Ch1 record
Common horizontal
position and delay
Common trigger
Common record start
point and record length
Figure 3- 6: Common trigger, record length, and acquisition rate for all channels