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

LIMISEG Enter Limit-Line Segment for Frequency
Example
10 OUTPUT 718;"IP;SNGLS;CF300MHZ;SPlOOMHZ;RB 3MHZ;"
20 OUTPUT 718;"LIMIDEL;"
30 OUTPUT 718;"LIMIMODE UPPER;"
35 OUTPUT 718;"LIMIFT FRED;"
40 OUTPUT 718;"LIMISEG 250MHZ ,-GODB,FLAT;"
50 OUTPUT 718;"LIMISEG 290MHZ,-60DB,SLOPE;"
60 OUTPUT 718;"LIMISEG 295MHZ,-15DB,FLAT;"
70 OUTPUT 718;"LIMISEG 305MHZ,-15DB,SLOPE;"
80 OUTPUT 718;"LIMISEG 3lOMHZ,-GODB,FLAT;"
90 OUTPUT 718;"LIMISEG 910MHZ,-60DB,FLAT;"
100 OUTPUT 718;"LIMIMODE LOWER;"
110 OUTPUT 718;"LIMISEG 250MHZ,-75DB,FLAT;"
120 OUTPUT 718;"LIMISEG SlOMHZ,-75DB,FLAT;"
130 OUTPUT 718;"LIMITEST 0N;TS;"
140 OUTPUT 718;"LIMIFAIL?;"
150 ENTER 718;A
160 DISP A
170 END
Description
Initializes spectrum analyq
changes the frequency,
span, and bandwidth.
Deletes the current limitline
table, sets the table
type to $xed.
Spec@es the upper limitline
table.
Selects a limit line based
on frequent y.
Adds segment to the upper
limit-line table
Specifies the lower limitline
table.
Adds segment to the lower
limit-line table.
Enables limit-line testing.
Returns the result of limitline
testing.
Displays the result.
If the current limit line table contains lines based on sweep time (as opposed to a limit line
based on the frequency), executing LIMISEG will clear the current sweep time limit line table,
and set LIMIREL to OFF.
Each limit-line segment is specified with a starting frequency, an amplitude, and a segment
type. The segment type defines how the line segment is to extend from its starting point to the
next segment. The segment types are FLAT, SLOPE, and POINT.
� 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.
w 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.
5-286 Programming Commands