The default entry page is the browse mode. Pressing button and inputting
the correct password to enter the modification mode; and buttons
could be used to move the cursor, and buttons could be used to
modify the parameter values when the cursor is located at the current place;
and buttons could be finally used to respectively confirm and cancel
the modification of the control parameters.
5.2 Main menu
Enter the Main Menu by pressing "Esc". “Up” and “Down” buttons are
respectively used to move the cursor to select the menu items, “OK” and
“ESC” buttons are respectively used to enter or exit the corresponding
pages of the menu items.