GSP-9300 User Manual 
66 
Bandwidth/Average Settings 
BW/AVG key sets the resolution bandwidth (RBW), video 
bandwidth (VBW) and averaging functions. The resolution, sweep 
time, and averaging are in a trade-off relationship, so configuration 
should be done with care. 
Resolution Bandwidth Setting (RBW) 
 
RBW (Resolution Bandwidth) defines the width 
of the IF (intermediate frequency) filter that is 
used to separate signal peaks from one another. 
The narrower the RBW, the greater the 
capability to separate signals at close 
frequencies. But it also makes the sweep time 
longer under specific frequency spans (the 
display is updated less frequently).  
SPAN-RBW Auto 
relationship 
When the RBW is set to Auto, the RBW is 
determined by the frequency span. This is 
shown in the table below. 
 
SPAN-RBW 
relationship in 
Auto mode.