초록 ▼

Different digital radio transceiver front panel escutcheon plate assemblies are provided for different optional transceiver configurations. A digital signal controller which is part of the main transceiver circuitry is capable of performing any of various basic and option functions under control of

Different digital radio transceiver front panel escutcheon plate assemblies are provided for different optional transceiver configurations. A digital signal controller which is part of the main transceiver circuitry is capable of performing any of various basic and option functions under control of program control instructions stored in an associated non-volatile memory. Subsets of those features are selectively disabled by irreversibly modifying the transceiver unit from the outside of the unit (e.g., by cutting certain PC board pathways through holes provided in the transceiver unit front panel). The controller enables (executes) portions of the program control instructions stored in its associated non-volatile memory and disables (does not execute) other portions of the stored program control instructions in response to detection of continuity/discontinuity over those certain pathways.

대표청구항 ▼

In a digital radio transceiver of the type including interchangeable user control arrangements disposed on an outer surface of a housing, said transceiver including digitally controlled circuitry disposed within said housing, a method of preventing someone from obtaining additional transceiver funct

In a digital radio transceiver of the type including interchangeable user control arrangements disposed on an outer surface of a housing, said transceiver including digitally controlled circuitry disposed within said housing, a method of preventing someone from obtaining additional transceiver functionality by substituting user control arrangements, said method including the following steps: (a) substantially irreversibly modifying said transceiver from outside of said housing so as to specify a particular user control arrangement, said particular user control arrangement having a corresponding set of functions associated therewith; (b) detecting the particular user control arrangement specified by said substantially irreversible modification; and (c) disabling said digitally controlled circuitry from performing any functions other than said corresponding set of functions associated with said particular user control arrangement in response to said detected specified arrangement.