Resolution Bandwidth defines the resolution bandwidth for the Spectrum measurement. The resolution bandwidth is identical with the RBW set with the Analyzer Settings softkey.
The nominal resolution bandwidth is the 3-dB bandwidth of the measurement filter. From a list discrete bandwidths between 10 Hz and 1 MHz can be selected. The frequencies in the list are given by 1x10n Hz, 2x10n Hz, 3x10n Hz, 5x10n Hz where n=1 to 5. In addition the two values 1 MHz and Auto can be selected.
With the Auto setting the resolution bandwidth is automatically adapted to
bandwidth = span/50
(if this value is inside the allowed range).
Resolution bandwidths for the analyzer and the Power measurement can be set independently.
Remote control
[SENSe:]SPECtrum:FREQuency:BANDwidth[:RESolution] <Bandwidth>
[SENSe:]SPECtrum:FREQuency:BWIDth[:RESolution] <Bandwidth>