National Instruments NI PXI-562X - Manual (Page 15)

© National Instruments Corporation 2-1 NI PXI-562x User Manual
2
Hardware Overview
This chapter provides an overview of the features and functionality of
the NI 562x.
How the NI 562x Works
A signal follows this path through the NI 562x to the host computer:
1. The signal enters the NI 562x through the analog front panel connector,
INPUT. Refer to the
Connecting Signals section to find more about the
front panel.
2. The signal is filtered and conditioned. Gain and dither are applied to
the signal. Refer to the
Conditioning the Signal—Impedance, Dither,
Gain, and AC Coupling section for more information.
3. The ADC converts the signal from analog to digital. Refer to the
Digitizing the Signal—The ADC section for more information.
4. (Optional) The digital downconverter (DDC) digitally zooms in
on data. Refer to the
Incorporating the DDC section.
5. The data is sent to onboard memory (the buffer). Refer to the Storing
Data in Memory section for additional information.
6. The data is transferred to the host computer via the PXI backplane.
Figure 2-1. Basic Signal Flow
DDC
(Optional)
Filtering/
Conditioning
ADC
Analog
Input
Onboard
Memory
P
X
I
B
u
s