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John User

Resolution bandwidth

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Resolution bandwidth (RBW) is a frequency-domain concept.  The WBT records time samples and has a spectral display that serves as a signal monitor.  Currently (SW version 2.3.1.35) the RBW of the spectral trace is [selected bandwidth] / 1,024.  

So for BW = 40 MHz, RBW is about 39 kHz.  

Variable RBW is a feature on the product road map but it won't affect the recorded data.

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Building on what Gene said, coming in releases 2.3 the RBW will be changeable by the user in "Sweep Mode", a speed optimized FFT with user settable start, stop, RBW, and statistical data based on a provided dwell time.  In release 2.4 (expected early June), ZoomFFT will be added which will allow any part of currently being collected data to be "reprocessed" to a RBW of the user's choice.  The sweeping mode will also be improved with faster sweep rates than 2.3 will provide.

These two features will greatly expand upon the RBW support for app writers, which will be used by some of QRC's integration teams, as well as others, in newer versions of tools like the Spectrum Analyzer App.

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