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应用文章
This application note describes the characteristics, setup, and operation ofthe Keysight TechnologiesInc. InfiniiVision oscilloscope swhen combined with the 89600 VSAsoftware to provide broadband vector signal analysis. By taking advantage ofthe layered architecture and extensive digital signal processing(DSP)routines of the 89600 VSA software, the oscilloscope becomes a new “front end” data acquisition subsystem for the 89600 VSA software. This hardware-software combination provides up to 6 GHz of analysis bandwidth depending on the oscilloscope used. See Table 1 for the supported oscilloscope models andthe corresponding analysis bandwidths. Appendix A contains suggestions forwideband downconverters.
The 8-bit, high sample rate analog-to-digital converter (ADC) in the InfiniiVision Series oscilloscopes produces the large analysis bandwidths shown in Table 1. These bandwidths are capable ofproviding a spurious-free dynamic range greater than or equal to 40 dB. This is sufficient for 1.5 to 2% error vector magnitude measurements inmost cases. For spectrum measurements with higher dynamic range, a traditional spectrum analyzer should be used.
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