Tektronix CSA8000B Manual de usuario descargar pdf (Pagina 101)

Acquiring Waveforms

CSA8000B & TDS8000B User Manual

3-27

Acquisition Control Background

This section contains background information on the data sampling and

acquisition process that can help you more effectively setup the acquisition

window of each channel. This section:

H describes the acquisition hardware.

H defines the sampling process, sampling modes, and the waveform record.

H describes the acquisition cycle in Normal and FrameScan modes.

Before a signal can be acquired, it must pass through the input channel where it

is sampled and digitized. Each channel has a dedicated sampler and digitizer as

shown in Figure 3--7; each channel can produce a stream of digital data from

which waveform records can be extracted. See Signal C onnection and Scaling on

page 3--4 for further description of scaling, positioning, and DC offsetting of

channels.

Digitizer

CH 1

Digitizer

CH 2

CH 3

CH n

Number of channels depends on sampling modules installed

Sampling module

Sampler

Digitizer

Sampling module

Sampler

Instrument

Figure 3- 7: Channel configuration

Acquisition is the process of sampling an 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 one sample per trigger event and, when taken from

Acquisition Hardware

Sampling Process

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Tektronix CSA8000B Manual de usuario Pagina 101