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Chapter 4. Status Menu
4-4
TSU 120 User Manual 61202129L1-1
Figure 4-3. Display of Alarm Message
View History
This menu item both displays and clears the accumulated sta-
tus changes of the unit.
View History displays a history of the first 20 status changes in
the unit, including the date, time, and type of change. The unit
also records for viewing, the date and time an alarm became
active and inactive, as well as the date and time of test activa-
tion and deactivation.
To clear the View History
display, press
Clear (Shift+9)
with the
View History menu active.
Port Status
Port Status displays the signals monitored on the data ports.
For example, the Nx/DBU interface monitors the RTS, CTS,
and RD, along with other signal lines. When a port is selected,
the LCD indicates if the signal is present.
The base Nx interface offers the status screen listed in this sec-
tion. When using other option cards, refer to the appropriate
separate manual for a definition of any status screens offered.
The Port Status of Nx/DBU is examined as an example of how
to use this item. The DBU feature is available only in the
TSU 120e.
Alarm Source
Alarm Message