Patent ID: 7414421

Claim:
An insertable calibration device for a programmable tester apparatus; said programmable tester apparatus being configured to test at least one electronic device with electronic circuits, comprising a holding device, comprising contact-making devices for said electronic device, and comprising tester channels for coupling in signals to said electronic device; said calibration device comprising: at least one calibration unit which is connected to a first tester channel of said tester channels to be calibrated; said at least one calibration unit being configured to detect a calibration signal edge of a calibration signal that is transmitted by said tester apparatus at a certain transmission instant, said at least one calibration unit being configured to detect a reference signal edge of a reference signal that is transmitted by said tester apparatus via a second tester channel of said tester channels at a reference instant, said at least one calibration unit being configured to compare the instants at which said two signal edges arrive, and said at least one calibration unit being configured to output a comparison result; and a control unit for evaluating said comparison results and for programming said transmission instants in such a way that said instants at which said calibration signal edge and said reference signal edge arrive, for the compensation of signal propagation time differences, are substantially identical; said calibration device, including said at least one calibration unit and said control unit, having the same form and connections as said electronic device and being insertable into said holding device with an accurate fit instead of said electronic device.