RIGOL  Chapter 2 Front Panel Operation 
User’s Guide for DSA800/E Series 
Table 2-40 Span for OBW Measurement 
Parameter  Description 
Default  2 MHz 
Range  100 Hz to 7.5 GHz 
Unit  GHz, MHz, kHz, Hz 
Knob Step  OBW Span/100, the minimum is 1 Hz 
Direction Key Step  in 1-1.5-2-3-5-7.5 sequence 
 
5.  Power Ratio 
Set the percentage the signal power takes up in the whole span power. You 
can use the muneric keys, knob or direction keys to modify this parameter.  
 
Table 2-41 Power Ratio for OBW Measurement 
99% 
1% to 99.99% 
Unit  % 
Knob Step  0.01% 
Direction Key Step  1%