Patent attributes
An insertable calibration device for a programmable tester apparatus comprises at least one calibration unit and a control unit. The progammable tester apparatus is configured to test at least one electronic device with electronic circuits. The progammable tester apparatus comprises a holding device, contact-making devices for the electronic device, and tester channels for coupling in signals to the electronic device. The calibration unit is connected to a first tester channel to be calibrated. The calibration unit is configured to detect a calibration signal edge of a calibration signal that is transmitted by the tester apparatus at a certain transmission instant, to detect a reference signal edge of a reference signal that is transmitted by the tester apparatus via a second tester channel at a reference instant, to compare the instants at which the two signal edges arrive, and to output a comparison result. The control unit evaluates the comparison results and can be used to program the transmission instants in such a way that the instants at which the calibration signal edge and the reference signal edge arrive, for the compensation of signal propagation time differences, are substantially identical. The calibration device has the same form and connections as the electric device and is insertable into the holding device with an accurate fit instead of the electronic device.
