PSA Series 5 hand-held RF spectrum analyzers: RBW and VBW
Resolution Bandwidth (RBW) and Video Bandwidth (VBW)
The analyzer has fully variable RBW between 300Hz and 10MHz in a settable 1:3:10 sequence, or can be set to Auto where it sets to an appropriate value for the current span.VBW can be similarly set over the same range. VBW tracking sets the VBW to be equal to the RBW or offset upwards or downwards by an amount settable by the Track Offset key.