Acquiring Waveforms
CSA7000B Series & TDS7000B Series Instruments User Manual
3-35
Digitizer
CH 1
Digitizer
CH 2
Digitizer
CH 3
Digitizer
CH 4
Figure 3- 8: Digitizer configuration
Acquisition is the process of sampling the analog input signal of an input
channel, converting it into digital data, and assembling it into a waveform
record, which is then stored in acquisition memory. Sampling, then, is the
process that provides a waveform record per trigger event (see Figure 3--10 on
page 3--36). The signal parts within the vertical range of the amplifier are
digitized. See Figure 3--9.
Input signal Sampled points Digital values
+5.0 V
-- 5 . 0 V
+5.0 V
-- 5 . 0 V
0V 0V 0V 0V
Figure 3- 9: Digital acquisition — sampling and digitizing
The instrument acquisition system can process the data as it is acquired,
averaging or enveloping the waveform data to produce enhanced waveform
records. Once the waveform record exists (enhanced or not), you can use the
postprocessing capabilities of the instrument to further process that record:
perform measurements, waveform math, and so on. Refer to Using the Acquisi-
tion Controls on page 3--24 for a description of the acquisition modes.
Sampling Process
Acquisition Modes
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