Patent ID: 7793135

Claim:
Mobile equipment for non stationary use, comprising: a real time clock RTC integrated in the mobile equipment for generating a real time information; a system time generator integrated in the mobile equipment for generating a system time information by adding an offset to the real time information given by the RTC; an output means for outputting the system time information generated by the system time generator; a non-volatile memory for the non-volatile storage of data; an input means for inputting instructions for changing the system time information; and a decision means for limiting the possible changes of the system time information generated by the system time generator to a preset time range, wherein: the real time information of the RTC is stored periodically in the non-volatile memory; said input means enables a user to input a reset time value for said RTC in case that the real time information from the RTC has been lost; said decision means checks if the reset time value input by a user is later than the last time information of the RTC stored in the non-volatile memory and, in case the input reset time value passes the check, the RTC is set to the new time according to the reset time value.