HP 8590 E & L Series Spectrum Analyzers and HP 8591C Cable TV ...

LIMIREL
Relative Limit Lines
Specifies whether the current limit lines are fixed or relative.
Syntax
LIMIREL OFF
Related Commands: LIMIDEL, LIMIFT, LIMILINE.
Example
ON
/
LIMIREL Relative Limit Lines
OUTPUT 718;"LIMIFT FREQ;" Selects a limit line based on frequency.
OUTPUT 718;"LIMIREL ON;" SpecQks that the limit line will be relative to the referencelevel
and center-frequency settings.
Description
You should use LIMIFT to select whether the limit lines are based on frequency or sweep time
before using LIMIREL, because changing between a frequency or sweep time limit line purges
the current limit line table and sets LIMIREL to OFF.
LIMIREL and the reference level: Regardless of whether the limit line is based on frequency
or sweep time, LIMIREL determines if the amplitude parameter in a limit line table represents
absolute values or relative values. If LIMIREL is set to OFF, the limit lines amplitude values
are specified in absolute amplitude and do not depend on the reference level (RL) setting. If
LIMIREL is set to ON, the limit line amplitude values are relative to the current reference level
(RL) setting.
For limit lines that are based on frequency: The LIMIREL command determines whether
the frequency parameter in a limit-line table represent absolute or relative values that are
referenced to the center-frequency settings.
� Executing “LIMIREL OFF;” specifies that 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 value.
� Executing “LIMIREL ON;” specifies that 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.
Programming Commands 5.283