110 Chapter 3 
Mode
Occupied Bandwidth Measurement
Mode
Segment (Center, 1st or 2nd)  
Selects the 
Center, 1st or, 2nd segment for limit mask 1 or 2. With each segment setting, the Limits 
menu is updated to show the span and level settings available for the currently selected segment
Center Segment  
Segments (Center) Sets the state of the center segment to On or Off. This key is available only when 
Mode SA
Remote Command :CALCulate:OBWidth:LMASk[1]|2:TRACe 1|2|3|4
:CALCulate:OBWidth:LMASk[1]|2:TRACe?
Example :CALC:OBW:LMAS1:TRAC 2
Dependencies / 
Couplings
The limit mask is always displayed when the center segment is 
turned on; even if the trace to which it is being applied is 
blanked (‘Show’ set to Off).
Preset 1
State Saved Saved in instrument state.
Range 1 | 2
Key Path
Meas Setup, Limit Masks, Limit Mask 1, Limit Mask Trace
Mode SA
Dependencies / 
Couplings
Key menu structure is dependant on selected segment. 
Remote Command 
Notes
The Limit Mask SCPI command syntax uses:
The keyword “CENTer” to define the Center segment level and 
span.
The keyword “FIRSt” to define the 1
st
 segments left and right 
level and span.
The keyword “SECond” to define the 2
nd
 segments left and right 
level and span.
Preset Center
State Saved Saved in instrument state.
Range Center | 1st | 2nd
Key Path
Meas Setup, Limit Mask 1, Segment (Center, 1st or 2nd)