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SENTER Segment Entry for Frequency Limit Lines
Item
Description/Default
Number
Any real or integer number. Default unit is dBm.
User-defined variable
A variable defined by VARDEF or ACTDEF commands.
Predelined
variable
A command that acts as a variable. Refer to Table 5-1.
Trace element
An element of trace A, trace B, trace C, or a user-defined trace.
Related Commands: LIMIMODE, LIMIREL, LIMISEG, SEGDEL, SENTERT.
Example 1
Range
Varies with FOFFSET
and ROFFSET.
Any valid variable
name.
This example enters limit-line values into the upper and lower limit-line tables.
OUTPUT
718;"LIMIFT
FREQ;"
Sets the limit lines to be based on
frew.=wh
Spec@.es
the upper and lower limit-
line table asfixed.
OUTPUT 718;"LIMIMODE
UPLOW;LIMIREL
OFF;"
OUTPUT
718;"SENTER
300MHZ,-lODB,-50DB,FLAT;"
Enters
in values
jiwasegment.
OUTPUT
718;"SENTER
350MHZ,-15DB,-60DB,FLAT;"
Entersinvalwforasegment.
Example 2
OUTPUT
718;"LIMIFT
FREQ;"
Sets the limit lines to be based on
.Pewenw
Specifies
the mid and delta table for-
mat
and#xed
type.
OUTPUT
718;"LIMIMODE
DELTA;LIMIREL OFF;"
OUTPUT
718;"SENTER
300MHZ,-20DB,lODB,FLAT;
‘I
Entersinvalues
forasegment.
OUTPUT
718;"SENTER
350MHZ,-30DB,20DB,FLAT;"
Entersinvaluesforasegment.
Description
Each limit-line segment is specified with a starting frequency, an upper or median amplitude
value, a lower or delta amplitude value, and a segment type. The segment type defines how the
line segment is to extend from its starting point to the next segment.
Note
If the current limit line table contains lines based on sweep time (as opposed to
a limit line based on the frequency), executing SENTER will clear the current
sweep time limit line table.
The three segment types are FLAT, SLOPE, and POINT.
n FLAT draws a zero-slope line between the coordinate point of the current segment and the
coordinate point of the next segment, producing limit-line values equal in amplitude for all
frequencies between the two points. If the amplitude values of the two segments differ, the
limit-line will “step” to the value of the second segment.
n SLOPE draws a straight line between the coordinate point of the current segment and the
coordinate point of the next segment, producing limit-line values for all frequencies between
the two points.
E-486
Programming Commands