©
National Instruments Corporation
2-1
2
DAQ System Overview
Fig
u
re 2-1 shows a typical DAQ system, which incl
u
des the USB-621
x
device, programming software, and PC (DAQ systems involving the
USB-621
x
Mass Termination device can also incl
u
de signal conditioning
devices and a cable for accessory connection). The following sections
contain more information abo
u
t the components of a typical DAQ system.
Figure 2-1.
Components of a Typical DAQ System
DAQ Hardware
DAQ hardware digitizes signals, performs D/A conversions to generate
analog o
u
tp
u
t signals, and meas
u
res and controls digital I/O signals.
Fig
u
u
res components common to all USB-621
x
devices.
Per
s
on
a
l Comp
u
ter
or L
a
ptop
DAQ
H
a
rdw
a
re
DAQ
S
oftw
a
re
