Abstract: An arrangement for supplying voltage to a number of loads for example, in a vehicle includes a vehicle power supply system (6) which has at least two energy stores. A first energy store is connected in a starter circuit element (6a) to a starter (8) for starting an engine; and a second energy store is connected in a load circuit element to the load. The starter circuit element is connected to the load circuit element via a coupling element, and loads which are classified as being safety-relevant can be connected to the starter circuit element via an additional coupling element.

Abstract: A method for operating a data network, which includes at least one transmission link, defined by a transmitter and a receiver, wherein in test mode the actual level reserve in the direction of the sensitivity limit, thus between the actual transmitting power of the transmitter and the actual sensitivity limit of the receiver, is determined for at least one transmission link. To better utilize the transmitting capacity of the data network, in test mode, the actual level reserve in the direction of the overload limit, thus between the actual transmitting power of the transmitter and the actual overload limit of the receiver, is also determined for the at least one transmission link.

Abstract: The invention relates to an arrangement (1) for supplying voltage to a number of loads (2, 2?), in particular in a vehicle (36), having a vehicle power supply system (6) which has at least two energy stores (4a, 4b), a first energy store (4a) of which is connected in a starter circuit element (6a) to a starter (8) for starting an engine, and a second energy store (4b) of which is connected in a load circuit element (6b) to the load (2, 2?), with the starter circuit element (6a) being connected to the load circuit element (6b) via a coupling element (12), and in which case a number of loads (2?) which are classified as being safety-relevant can be connected to the starter circuit element (6a) via an additional coupling element (14).

Abstract: A method for checking a ring optical network line for data transmission between a plurality of network subscribers in a motor vehicle, wherein one network subscribers carries out a master function, wherein, apart from the optical network line, there is a further communication line which has a star structure. The network subscribers having the master function is arranged in the centre of the star structure and is connected directly via the communication line to every other network subscribers. The optical network line is checked by the network subscriber having the master function outputting a start signal to the individual network subscribers. The individual network subscribers acknowledge the start signal for the network subscribers the master function via the communication line. After the start signal, the network subscriber having the master function outputs an initialization signal via the optical network line.

Abstract: A method for operating a data network, which includes at least one transmission link, defined by a transmitter and a receiver, wherein in test mode the actual level reserve in the direction of the sensitivity limit, thus between the actual transmitting power of the transmitter and the actual sensitivity limit of the receiver, is determined for at least one transmission link. To better utilize the transmitting capacity of the data network, in test mode, the actual level reserve in the direction of the overload limit, thus between the actual transmitting power of the transmitter and the actual overload limit of the receiver, is also determined for the at least one transmission link.

Abstract: In a data communication system, in particular for a motor vehicle, the transmission lines that lead to the individual terminals are interconnected at a passive network in a star configuration and are there provided with frequency-dependent attenuation means, preferably ferrite beads. Good characteristic impedance adaptation is thus obtained for suppressing high-frequency distributing signals, while retaining free choice of the system parameters for the steady data symbolic state. The system may be enlarged by means of additional star networks into a tree or meshed structure.

Abstract: A cable arrangement with two pairs of conductors for two separate circuits, one conductor of a pair is split into two partial conductors. Neutralization, i.e., capacitive and inductive uncoupling of the two circuits is possible by symmetrical arrangement of the conductors.