Chapter 3. Operation4 2 TSU 600 User Manual 61200.076L2-1AlarmUsed as quick access to the active alarm displaymenus. This can be activated while any other menuitem is in use. When the Alarm menu is exited, theunit returns to the location of the same menu that wasactive when Alarm was selected.ShiftWhen pressed and held, causes the shift functions(identified above the keys) to be activated.ClearUsed in various menus to clear data/result fields.CancelCancels the last operation or exits the current menulevel to the next higher level. If a value on a menuwas selected but not entered, Cancel terminates thefunction and restores the previous setting.EnterActivates menu selections. Enters data value selec-tions into the system.Up and Down ArrowsMoves cursor through the menus or scrolls throughdata selector lists.KeypadThese nine keys have dual functions. The first func-tion is indicated by the lettering on the key itself. Thisis a standard phone keypad. The second function is ashifted function accessed by pressing and holding theshift key # along with another key. The shift functionis indicated by the lettering above the keys.A, B, C, D, E, FUsed as needed to extend the menu selection fields.2Used to inject errors with a test pattern running.
