64 Chapter 3 
Mode
Meas Off (Spectrum Analyzer) Measurement
Mode
1st Segment  
Sets the state of the first segment to On or Off. This key is available only when 
1st has been selected 
with the 
Segments key.
Example :CALC:LMAS1:SEGM:CENT:SPAN 1.75 MHz
Notes Key is only displayed when the selected segment is Center.
Preset Not affected by a preset but set per default to 2 MHz after a 
power cycling.
State Saved Saved in instrument state.
Min 0 Hz
Max Current measurement span
Key Path
Meas Setup, Limit Masks, Limit Mask 1, Center Span
Default Unit Hz
Mode SA
Remote Command :CALCulate:LMASk[1]|2:SEGMent:FIRSt ON|OFF|1|0
:CALCulate:LMASk[1]|2:SEGMent:FIRSt?
Example :CALC:LMAS1:SEGM:FIRS ON
Notes
Key is only displayed when the selected segment is 1
st
.
Dependencies / 
Couplings
If Off the 2
nd
 limit mask segment will not be displayed even if 
turned On.
If On and the Center segment is On:
The left hand side 1
st
 segment is drawn to the left hand side of 
the center segment at the specified power level.
The right hand side 1
st
 segment is drawn to the right hand side 
of the center segment at the specified power level.
For both left and right 1
st
 segments when On.
If the 2
nd
 segment is Off the 1
st
 segment extends so the total 
limit mask span is equal to the current frequency span.
If the 2
nd
 segment is On the left and right 1
st
 segments use the 
specified span values.
Preset Off
State Saved Saved in instrument state.
Range On | Off