Abstract: A motherboard is shielded by way of a shielding metal sheet. A shielding metal sheet according to the invention is embodied such that the dimensions thereof in the longitudinal and transverse direction do not exceed the dimensions of the motherboard, thus advantageously allowing the shielding metal plate to be mounted directly on the motherboard. By directly mounting the shielding metal plate on the motherboard, the motherboard can also be transported or mounted on a main board as a unit along with the protecting shielding metal plate. The novel device is particularly suitable for decentralized parts production processes and finishing processes of entire shielded electronic systems requiring a lot of components, especially for applications in motor vehicles.

Abstract: Performance Test Board for connecting at least one device under test (DUT) to a test system which has internal power supply sources (IPS) wherein said Performance Test Board (PTB) comprises at least one DC-DC-converter having an input terminal to which several internal power supply sources of said test system are connected in parallel, an output terminal to which a power supply terminal of said device under test (DUT) is connected and a control terminal to which a further internal power supply source of said test system is connected.

Abstract: Performance Test Board for connecting at least one device under test (DUT) to a test system which has internal power supply sources (IPS) wherein said Performance Test Board (PTB) comprises at least one DC-DC-converter having an input terminal to which several internal power supply sources of said test system are connected in parallel, an output terminal to which a power supply terminal of said device under test (DUT) is connected and a control terminal to which a further internal power supply source of said test system is connected.

Abstract: An antitheft device for a motor vehicle has a first receiver (2) in the motor vehicle, which is designed to receive signals in narrowband. The signals received by this receiver are evaluated in accordance with the code information contained in them. Furthermore, the antitheft device has a second broadband receiver (7) which receives signals outside the useful frequency band (3). If signals are received whose signal strength is above a threshold value (S), whose signal duration is shorter than a predefined time period (t2–t1) or whose code information corresponds largely to anticipated code information, the access to the motor vehicle, and its use, are not enabled.

Abstract: An antitheft device for a motor vehicle has a first receiver (2) in the motor vehicle, which is designed to receive signals in narrowband. The signals received by means of this receiver are evaluated in accordance with the code information contained in them. Furthermore, the antitheft device has a second broadband receiver (7) which receives signals outside the useful frequency band (3). If signals are received whose signal strength is above a threshold value (S), whose signal duration is shorter than a predefined time period (t2-t1) or whose code information corresponds largely to anticipated code information, the access to the motor vehicle, and its use, are not enabled.