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Radio transceiver with optional display

  • US 5,077,832 A
  • Filed: 08/07/1989
  • Issued: 12/31/1991
  • Est. Priority Date: 08/07/1989
  • Status: Expired due to Term
First Claim
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1. A digitally controlled radio transceiver optionally including an internal visual display module, said transceiver comprising:

  • connector means for connecting to said display module; and

    a digital controller connected to said connector means, a said controller including;

    user interface means or alternately providing first and second user interface modes, said first user interface mode requiring cooperation with said display module for viewing prompts necessary for controllably operating said transceiver, said second user interface mode not requiring cooperation with said display module for controllably operating said transceiver,said user interface means including;

    first mode means preprogrammed for providing display of a first set of control selection prompts via said display module and for accepting user control inputs from said keypad means so as to provide a first set of functions, andsecond mode means preprogrammed or providing no display of control selection prompts via said display module and for accepting user control inputs rom said keypad means so as to provide a second set of functions different from said first set;

    testing means connected to said connector means for determining whether said display module is connected to said connector means, andmode selection means, including means for selecting between said first and said second mode means, connected to said testing means and to said user interface means for controlling said user interface means to provide said first user interface mode if said testing means determines said display module is present and for controlling said user interface means to provide said second user interface mode i said testing mean determines said display module is not present.

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