HP ESA-E Series Programmer's Manual page 166

Language Reference
CALCulate Subsystem
Remarks:
Front Panel
Access:
Set Fixed or Relative Limit Lines
:CALCulate:LLINe:CMODe FIXed|RELative
:CALCulate:LLINe:CMODe?
Specifies whether the current limit lines are fixed or relative.
If you need to change the domain with
NOTE
:CALCulate:LLINe:CONTrol:DOMain, do it before this command.
Changing the domain deletes all the existing limit line values.
Factory Preset
and *RST:
Remarks:
5-12
Once this function is defined, the selected type is
persistent. Persistent means that it retains the setting
previously selected, even through a power cycle.
Display, Limits, Modify, Amptd Interp Log Lin
Not affected by preset
For Amplitude Parameters:
Regardless of whether the limit line is based on
frequency or sweep time, amplitude parameters in a
limit line table represent absolute values or relative
values. In fixed, the limit line amplitude values are
specified in absolute amplitude and do not depend on
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 fixed
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 center
frequency settings. Relative limit lines are specified in
relative frequency and are positioned with respect to
the current center frequency. When the current center
frequency value is changed, the segment frequencies
are converted according to the current center frequency
value.
For Time Parameters:
Limit lines that are based on sweep time are always
relative to the start time. The horizontal position of the
Chapter 5