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Acquisition Hardware
Before a signal can be acquired, it must pass through the input channel where it is scaled and
digitized. Each channel has a dedicated input amplifier and digitizer, as shown in the following
figure; each channel can produce a stream of digital data from which the instrument extracts
waveform records. Refer to Signal Connection on page 227 for further description of scaling,
positioning, and DC offsetting of channels.
Sampling Process
Acquisition is the process of sampling an analog signal, 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 as shown in the figure below.
The signal parts within the vertical range of the amplifier are digitized as shown in the figure
below.
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