S820E Microwave Site Master™ User Guide : Classic Mode Operation : Limit Menu
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 (On Off)
This key toggles the limit line On or Off. Limit line amplitude is stored even when turned off. The type of limit line, upper or lower, is determined by the measurement. For example, VSWR and Return loss utilize an upper limit, and Cable Loss utilizes a lower limit. The limit line changes from green to red when the limit is reached. Any points on a trace that touch or exceed a limit line setting are also displayed in Red.
Edit Value
Press this key to change the amplitude of the limit line with the Up/Down Arrow keys, rotary knob, or the number keypad.
Limit Alarm (On Off)
When turned On, the Limit Alarm sounds a repeating 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). See Figure: Pass / Fail Messages.
Limit Preset
Turns the limit line Off and clears amplitude information. The next time that a limit line is turned On, it is displayed at the default location (center of the display).
Pass/Fail Messages
Figure: Pass/Fail Message Turned On shows the Pass/Fail message. To change the size and location of the Pass/Fail message, (when the Limit menu is displayed) tap the small circled arrow in the lower‑right corner of the large format message box. The circled arrow is in the upper‑left corner when the message is in small format. Notice that the trace is displayed in red wherever it meets or exceeds the set limit.
Pass / Fail Messages
Classic Mode Limit Lines Messages
Typical End Tool
Pass/Fail Criteria
Return Loss
Pass when the trace is below the limit line
DTF Return Loss
Pass when the trace is below the limit line
Cable Loss
Short or Open
Pass when the trace is above the limit line
Pass when the trace is below the limit line
Pass when the trace is below the limit line
All Other Menus
The other menus that are shown in Figure: “Classic Mode” Menu Keys (1 of 2) and Figure: “Classic Mode” Menu Keys (2 of 2) are described in Cable and Antenna Measurements.