Hardware Overview; How The Ni 5620 Works - National Instruments NI 5620 User Manual

Hardware Overview

How the NI 5620 Works

Analog
Input
Filtering/
Conditioning
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This chapter provides an overview of the features and functionality of the
NI 5620.
A signal follows this path through the NI 5620 to your host computer:
1. The signal enters the NI 5620 through the analog front panel
connector, INPUT. To find more about the front panel, see the
Connecting Signals
2. The signal is filtered and conditioned. Gain and dither are applied to
the signal. See the
and AC Coupling
3. The ADC converts the signal from analog to digital. Refer to the
Digitizing the Signal—The ADC
4. (Optional) The digital downconverter (DDC) digitally "zooms in"
on data. See the Incorporating the DDC
5. The data is sent to onboard memory (the buffer). See the
in Memory section for additional information.
6. The data is transferred to your host computer.
ADC
2-1
section later in this chapter.
Conditioning the Signal—Impedance, Dither, Gain,
section for more information.
section for more information.
DDC
(Optional)
Figure 2-1. Basic Signal Flow
2
section.
Storing Data
P
X
I
Onboard
Memory
B
u
s
NI 5620 User Manual