Cable and Antenna Analyzer Measurement Guide : Cable and Antenna Analyzer : Limit Menu
 
Limit Menu
Limit lines can be used for visual reference only, or for pass/fail criteria using the limit alarm. Limit alarm failures are reported whenever a signal crosses the limit line.
Each limit line can consist of a single segment, or as many as 40 segments across the entire frequency span of the instrument. These limit segments are retained regardless of the current frequency span of the instrument, allowing the configuring of specific limit envelopes at various frequencies of interest without having to re-configure them each time the frequency is changed. To clear the current limit setup configuration and return to a single limit segment starting at the current start frequency and ending at the current stop frequency, press the Clear Limit submenu key.
Key Sequence: Shift > Limit (5) key
Limit Menu
Limit On/Off
This key toggles limit lines On or Off.
Single Limit
This key create a single segment limit line. The amplitude of the limit line is adjusted with the arrow keys, rotary knob, or the numeric keypad.
Multi-Segment Edit
The Limit Edit Menu is displayed to allow the creation or editing of single or multi-segment limit lines. The currently active limit point is marked by a red circle on the display.
Limit Alarm
This submenu key selects, for the currently active limit line, if an alarm beep will occur when a data point exceeds the limit.
Pass Fail Message
This submenu key selects, for the currently active limit line, if a red “Fail” message displays when a data point exceeds the limit, or if a green “Pass” message displays when no data points exceed the limit.
Pass/Fail Unbounded/Bounded
This submenu key selects the Unbounded or Bounded test condition, and is used in conjunction with Bounded Markers. When Bounded, the Pass/Fail (or Warning) message is determined only by the active limit line and trace segment that is within the bounded markers. Note that Markers 1 and 2 can be Bounded with Marker 5 and that Markers 3 and 4 can be Bounded with Marker 6 from the Marker Options menu (see Marker Menu).
Warning Limit Offset
This submenu key sets, for the currently active limit line, if an orange “Warning” message displays when a data point exceeds the set offset value from the limit line and when Pass Fail message is enabled. A Warning message is not displayed when the offset is set to 0 dB.
Clear Limit
This submenu key deletes all limit points for the currently active limit line.