A method of testing an electronic unit by comparing resulting signal shapes from the unit to be tested and a known functioning unit. The method includes powering off the units for testing and feeding one or more predefined signal shapes of two or more different frequencies as input signals to the known functioning unit and to the unit to be tested at corresponding test points. The method further includes measuring the resulting signal shapes from both units at corresponding measurement points and comparing at least one resulting signal shape from the known functioning unit with the corresponding resulting signal shape from the unit to be tested. The method also includes detecting a fault in the unit to be tested on the basis of an existing signal shape distortion in time axis of the resulting signal shape received from the unit to be tested.

An example test system includes a test head, and a device interface board (DIB) configured to connect to the test head. The DIB is for holding devices under test (DUTs). The DIB includes electrical conductors for transmitting electrical signals between the DUTs and the test head. Servers are programmed to function as test instruments. The servers are external to, and remote from, the test head and are configured to communicate signals over fiber optic cables with the test head. The signals include serial signals.

In some examples, a device includes a control circuit configured to deliver driving signals to a switch. The device also includes a testing circuit configured to cause the control circuit to toggle the switch at a first instance and determine a parameter magnitude at the switch at a second instance after toggling the switch at the first instance by at least determining a voltage magnitude at the switch at the second instance. The testing circuit is also configured to cause the control circuit to toggle the switch after the second instance and determine a parameter magnitude at the switch at a third instance after toggling the switch after the second instance. The testing circuit is further configured to generate an output based on the determined parameter magnitudes at the switch at the second and third instances.

An electronic device having a self-diagnosis function is proposed. In the electronic device, a fault detector is provided on a primary side of a power board, so that fault states of a main board and a load may be detected even when the main board is broken or power is not applied to the main board. In addition, as long as commercial alternating power is input, even in a state where a power switch is turned off, the electronic device is supplied with the power, so that various types of faults in the main board and the load may be detected.

A monitoring system for monitoring the condition of and energy guide chain and/or a cable guided in an energy guide chain. Energy guide chains are used for guiding cables, hoses or the like, between abase and a moving end displaceable along a travel path and, in so doing, form a mobile run connected to the moving end, a stationary run with a connection end for the base and a deflection arc between the two runs. A monitoring device with at least one sensing component arranged on the energy guide chain. The monitoring device evaluates a signal generated using the sensing component in order to monitor the occurrence of a fault condition during operation of the energy guide chain. The sensing component includes an electrical indicator conductor guided by the energy guide chain and extending along the greater part of the length of the mobile run. To monitor the condition of a cable and in this case includes two electrical indicator conductors guided by the energy guide chain, the one end of which is connected to the monitoring device and the other end of which is short-circuited.

A current supply device includes a multiplexed digital bus, an output terminal, and a group of power supplies connected in parallel between the multiplexed digital bus and the output terminal. The group of power supplies are controlled via the multiplexed digital bus such that a combined output current of the group of power supplies is applied to the output terminal.

Disclosed is a method for detecting a short-circuit in an H-bridge electronic circuit, including: activating a current source on a first test branch; taking a first potential measurement of one of the output terminals; activating, if the first potential measurement is substantially different from the potential of the power supply terminal to which the first test branch is connected, a current source on a second, diametrically opposite test branch; taking a second potential measurement of each output terminal; and signalling the detection of a localized short-circuit in the output terminal having the potential resulting from the second potential measurement that is closest to the potential resulting from the first potential measurement.

A test and measurement instrument including a voltage source configured to output a source voltage, a current sensor, and one or more processors. The one or more processors are configured to determine an estimation of a load of an unknown connected device under test based on the source voltage, the current sensor, and a voltage of the connected device under test without any prior knowledge of the connected device under test.

An example test system includes an output stage to source at least one of voltage or current to a channel of a test instrument; a tracking circuit to detect a channel voltage following the output stage and to control a supply voltage to the output stage based on the channel voltage; and a controller to determine a power dissipation of the output stage based on the supply voltage and the channel voltage, and to control the output stage based on the power dissipation in the output stage.

Processing hardware of a processor is virtualized to provide a façade between a consistent programming interface and specific hardware instances. Hardware processor components can be permanently or temporarily disabled when not needed to support the consistent programming interface and/or to balance hardware processing across a hardware arrangement such as an integrated circuit. Executing software can be migrated from one hardware arrangement to another without need to reset the hardware.