To provide a program viewing-recording system which executes program viewing or recording without a failure when a program is viewed or recorded using a program list created by a third party. The method checks the state of a hook switch of the ordinary telephone connected to the WLL terminal. A storage device is provided for storing at least one calibration factor for compensating for errors associated with at least one of at least one external current transformer and at least one external potential transformer that operates on the electrical energy provided to the meter device. The notification unit notifies, as a response to the determination of the insufficient state by the determination unit, the gist thereof to a user. More specifically embodiments of the invention are 2\u2032,4\u2032-substituted nucleoside compounds useful for the treatment of viral infections, such as HIV, HCV, and HBV infections. In this context, in the following or tracking operation, in which a regulation of the speed of the motor vehicle dependent on the spacing distance to detected target objects that are classified as relevant is carried out, the relevant target objects used for the speed regulation are selected by the operation of an operating element to be operated by the operator of the motor vehicle.