DURCH KARTEN PROGRAMMIERTE FERNSPRECHSTEUEREINRICHTUNG FUER EIN FUNKSENDEGERAET

A frequency control unit programmed by card for a transceiver comprising: - a housing for said unit including a front panel; - a card reader with an entry for the cards to be read located behind said front panel; -an opening in the front panel coinciding with the entrance of the reader, -a card to insert in said opening and to be read by the reader. On said card, the mode of operation, the transmission frequency and the reception frequency are programmed; the latter are programmed according to a binary decimal code; -the card reader has a first group of output conductors, of which each conductor provides each of the possible bits that can be programmed in the card to provide the transmission frequency, and a second group of output conductors, each one whose conductors provide each binary bit that can be programmed on the card to provide the reception frequency; - a third group of output drivers, each of whose conductors provides each of the possible frequencies that can be programmed for transmission and reception operations and; A frequency selector circuit coupled between the first and second conductor groups and the third group of conductors, for coupling the appropriate conductors of the first group of conductors, as determined by the transmission frequency programmed on the card, to the associated conductors of the third group of conductors, when the transmission is activated and for coupling the appropriate conductors of the second group of conductors, as determined by the reception frequency programmed on the card, to the associated conductors of the third group of conductors, when reception is activated. (Machine-translation by Google Translate, not legally binding)