5 Operation
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5 OPERATION
5.1 Display and Keypad
The alphanumeric display has 4 rows of 20 characters each.
The text-based menus are supported by 5 addtional symbols.
The keypad consists of 6 push buttons whose respective func-
tions are explained by a symbol or a piece of text. 3 push but-
tons are equipped with light emitting diodes (LED) for an
additional indication of the device state.
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