3-34 PN: 10580-00343 Rev. H S820E UG
3-7 Measurement Setup Cable and Antenna Measurements
Limit Lines
Limit lines are used for visual reference or for pass/fail criteria using the
limit alarm and pass/fail message setting. 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.
• Select the Limit main menu key before trying to move a limit line using
the touchscreen.
• Limits set beyond the current amplitude range are displayed at either
the top or bottom of the graph.
• The last (most recent) limit line amplitude is stored when a limit line is
turned off.
• Limit Preset turns off the limit line display, limit amplitude, limit
alarm, and the Pass/Fail message.
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 and 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 number keypad.
Note
Both the Upper and Lower limit lines for a trace must be of
the same type: either both are Single, or both are
Segmented.
Note Limit lines cannot be moved by using the touchscreen.
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