Agilent Technologies ESA-E Series Programmer's Manual page 179

Language Reference
CALCulate:LLINe Subsectio n
the reference level. In relative, the limit line amplitude
values are relative to the current reference level .
For Fixed Frequency Parameters :
The frequency values in a limit line table are fixe d
values, and the limit line is positioned accordingly.
Fixed limit lines are specified in absolute frequency and
do not depend upon the center frequency values .
For Relative Frequency Parameters :
The frequency values in a limit line table are relative
values and positions the limit line relative to the cente r
frequency settings . Relative limit lines are specified in
relative frequency and are positioned with respect t o
the current center frequency. When the current center
frequency value is changed, the segment frequencie s
are converted according to the current center frequency
value.
For Time Parameters :
Limit lines that are based on sweep time are alway s
relative to the start time . The horizontal position of the
limit line is not affected by this command .
Front Panel
Access :
Display, Limits, Properties, Limits Fixed Re l
Set Limit Line X-axis Units
:CALCulate :LLINe :CONTrol :DOMain FREQuencylTIME
:CALCulate :LLINe :CONTrol :DOMain ?
Selects how the limit line segments are defined : according to frequency,
or according to the sweep time setting of the spectrum analyzer.
NOTE
Changing this setting deletes all existing limit data from the analyzer.
In other words, if a limit line has already been defined, changing th e
type clears the existing limit line .
Factory Prese t
and *RST :
not affected by Preset
Remarks : For TIME, the limit line segments are placed on the
spectrum analyzer display with respect to the swee p
time setting of the analyzer, with 0 at the left edge o f
the display.
For FREQuency, segments are placed according to th e
frequency that is specified for each segment .
Chapter 5 5-19