> Limit Menu
> Limit lines can be used for visual reference only, or for pass/fail criteria using the limit alarm and Pass/Fail Message keys. Limit alarm failures are reported whenever a signal crosses the limit line.
> Key Sequence: Limit (6)

> Limit Menu

> Single Limit
> Limit Line
> This key toggles the limit line on or off. Limit line amplitude is stored even when turned off.
> Edit Value
> Press this key to change the amplitude of the limit line with the Up/Down arrow keys, rotary knob, or the numeric keypad.
> Limit Alarm (On Off)
> When turned On, the Limit Alarm will sound a beep when the trace touches the limit line.
> Pass/Fail Msg (On Off)
> When turned On, a Pass or Fail message is displayed to indicate whether the trace touches or exceeds the limit line (Fail). Refer to .
> Limit Preset
> Turns the limit line Off and clears amplitude information. The next time that a limit line is turned On, it will be displayed at the default location (center of the display).

> Limit Lines Messages
> Measurement | Typical End Tool | Pass/Fail Criteria
> Return Loss | Load | Pass when the trace is below the limit line
> DTF Return Loss | Load | Pass when the trace is below the limit line
> Cable Loss | Short or Open | Pass when the trace is above the limit line
> VSWR | Load | Pass when the trace is below the limit line
> DTF VSWR | Load | Pass when the trace is below the limit line