S331L UG PN: 10580-00321 Rev. M 3-31
Cable and Antenna Measurements 3-6 Measurement Setup
Limit Lines
Limit lines are used for visual reference or for pass/fail criteria using
the limit alarm and pass/fail message settings. Pressing either the Limit
(6) key or the Limit main menu key displays the Limit menu.
Overview of limit lines:
• Each measurement has a unique limit line.
• The color of the limit line changes to red when a measurement
trace exceeds a limit.
• Limits set beyond the current amplitude range are displayed at
either the top or bottom of the graticule.
• The limit line amplitude is stored when a limit line is turned off.
• Limit Preset will turn off the limit line display, limit alarm and
Pass/Fail message, and reset upper and lower limits to their
default values.
Limit Line Functions
1. Press Limit (6), then press the Active Limit key (if necessary) to
choose Upper or Lower, then press the Limit State key to turn On a
measurement-specific limit line.
The limit line can be set as a single or a segmented limit. A single
limit line extends over the entire displayed range of the sweep,
independent of the start/stop settings of the sweep. For a single
limit line, the amplitude for the start/stop points is the same. A
segmented limit line can be divided into connected or
disconnected segments with different start/stop x and y values.
2. Press Move Active Limit to set the limit line value by using the
Up/Down Arrow keys, rotary knob, or numeric keypad.
3. For segmented limit lines, press Edit Segments to display the
Segments menu. A table displays active limit line segments.
Note
Both the upper and lower limit lines for a trace must be of
the same type, either single or segmented.
Note Limit lines cannot be moved by using the touchscreen.
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