Gw Instek GSP-830Spectrum analyzer, spectrum analyzerBandwidth (RBW) 3/30/300 kHz/4 MHz GSP-830 数据表

Select RBW (Resolution BandWidth) 

 

Background 

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 span (the display is updated 
less frequently). See page99 for suitable RBW selection. 

Panel operation 

1.  Press the BW key. 

BW

 

 

2.  Press F1 (RBW) to select Auto 

or Manual. 

RBW

Auto  Man

 

 

3.  When Man (manual) is selected, 

use the Arrow keys or Scroll 
knob to select the RBW. The 
selected RBW appears in the 
command window. 

 

 

RBW: 30kHz

Mode Auto 

RBW is automatically selected. See 
page99 for the setting. 

 Manual 

 

RBW is manually selected. The BW icon 
appears at the bottom of  the display. 

Range 

See page99 for RBW reference setting according to the 
frequency span. 

 RBW 

Recommended 

span 

Standard/ 

Optional 

 300Hz 

Span<30kHz Optional 

(300Hz 

RBW) 

 3kHz 

Span<300kHz Standard 

 9kHz 

300kHz≤Span<600kHz Optional 

(EMI 

Filter - page146) 

 10kHz 

300kHz≤Span<1MHz Optional 

(10k/ 

100kHz RBW) 

 30kHz 

300kHz≤Span<6MHz Standard