RIGOL  Chapter 2 Front Panel Operation 
User’s Guide for DSA800/E Series 
OBW 
 
Measurement Interface: 
 
Figure 2-17 OBW Measurement Interface 
 
Measurement Results: occupied bandwidth and transmit frequency error.  
  Occupied Bandwidth: integrate the power within the whole span and then 
calculate the bandwidth occupied by the power according to the specified 
power ratio.  
  Transmit Frequency Error: difference between the center frequency of the 
channel and the center frequency of the analyzer. 
 
Measurement Parameters: average number, average mode, max hold, span 
and power ratio.  
 
1.  Avg Num 
Specify the number of averages used when calculating the measurement 
result and the default is “Off”. You can use the numeric keys, knob or direction 
keys to modify this parameter.