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NI5751 Datasheet(PDF) 3 Page - National Instruments Corporation

Part No. NI5751
Description  16-Channel, 50 MS/s, 14-Bit Digitizer Adapter Module for NI FlexRIO
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Maker  NI [National Instruments Corporation]
Homepage  http://www.NI.com
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NI5751 Datasheet(HTML) 3 Page - National Instruments Corporation

 
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NI FlexRIO FPGA modules at rates greater than 800 MB/s for additional processing and I/O integration. You can also stream to and from select PXI Express NI modular
instruments for an even greater variety of I/O.
PXI NI FlexRIO FPGA modules feature Xilinx Virtex-5 LX FPGAs with up to 128 MB of onboard DRAM, which you can access at bandwidths up to 1.6 GB/s. They feature all the
benefits of the PXI platform including synchronization, triggering, and high-speed data transfer to and from their host.
Table 4. PXI and PXI Express FPGA Module Comparison
National Instruments and third parties offer NI FlexRIO adapter modules, and you can build your own adapter modules using the NI FlexRIO Adapter Module Development Kit
(MDK). With custom adapter modules, you can implement the exact analog and digital I/O your application requires, along with graphical FPGA programming provided by
LabVIEW. View a current list of NI and third-party adapter modules at
. This ability to easily create high-bandwidth P2P data streams helps provide scalable signal
ni.com/flexrio
processing and I/O integration.
LabVIEW FPGA
With the high-level graphical programming capabilities of LabVIEW FPGA, programming for the NI 5751 is far simpler than low-level HDL programming. Acquiring samples from
one NI FlexRIO digitizer adapter module's analog-to-digital converter at its configured rate and placing the data into an FPGA FIFO is depicted in Figure 3.
Figure 3. LabVIEW FPGA Code for Acquiring Data from an NI FlexRIO Digitizer Adapter Module
From this point, you may implement your own processing, filtering, fast Fourier transform (FFT), or control. Figure 4 shows custom demodulation using IP from the FPGA RF
Communications Library on
.
ni.com/labs
Figure 4. LabVIEW FPGA Code for Demodulating and Decoding I and Q Signals after 4X Decimation
For implementing a real-time spectrum analyzer, Figure 5 shows code that performs windowing, conversion to the frequency domain, comparison against a frequency mask, and
assertion of a trigger when that mask is exceeded.


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