PXI bus-based radio frequency real-time measurement vector analysis plug-in structural module
A real-time measurement and vector analysis technology, applied in spectrum analysis/Fourier analysis, transmission monitoring, electrical components, etc., can solve problems such as insufficiency, the maximum resolution bandwidth is only 1M, etc., achieving ingenious installation and easy scalability , compact structure
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[0036] see figure 1 Shown is a specific embodiment of the present invention.
[0037] from figure 1 It can be seen that the present invention includes a PXI interface and an intermediate frequency signal processing circuit 1, an analog-to-digital conversion circuit 2, a receiver circuit 3, and a frequency synthesizer circuit 4 together with the peripheral card E, which combine to form a modular structure as a whole, in:
[0038]Described PXI interface and intermediate frequency signal processing circuit 1 are PCI+FPGA and DDC+FPGA framework, are provided with PCI interface chip U1, DDC chip U4, FPGA chip U2, SDRAM chip U3 and clock chip U6, and the address of PCI interface chip, The data and control ports are directly connected to the PXI bus through the plug-in card E; the HP port of the PCI interface chip U1 is directly connected to the FP port of the FPGA chip U2 in a bidirectional manner; the 7th and 9th pins of the DDC chip U4 are respectively connected to the FPGA ...
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