Multi Span Analysis Application for Spans Greater than 20 MHz
The NI PXI-5660 RF Signal Analyzer ( RFSA) has a real-time bandwidth of 20 MHz. This example demonstrates using NI Spectral Measurements Toolset (SMT) functions to analyze spectrums spans of more than 20 MHz.
For example, consider an application analyzing a spectrum from a start frequency of 10 MHz to a stop frequency of 60 MHz. To view this 50 MHz span using the RFSA, you first set up the PXI-5600 to examine three continuous 20 MHz spans. The NI PXI-5660 returns time-domain data corresponding to each of the three segments. This example demonstrates using the Spectral Measurements Toolset to transform the time-domain data for each segment to the frequency domain, concatenate the segments together, and then display the complete spectrum on a graph.
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