Patent ID: 7434118

Claim:
A coupling unit for coupling a first and a second unit to be tested, said coupling unit comprising a first signal path providing a signal connection between at least one terminal of the first unit to be tested and at least one terminal of the second unit to be tested; with said first signal path comprising a signal conditioning facility receiving a first signal from the first unit to be tested, conditioning said first signal in accordance with predefined parameters, and providing the conditioned first signal to the second unit to be tested; said coupling unit further comprising a second signal path providing a signal connection between the at least one terminal of the second unit to be tested and the at least one terminal of the first unit to be tested, the signal connection receiving a second signal from the second unit to be tested and providing the second signal to the first unit to be tested; and first switching facilities switching the signal path to select a signal of said first signal path or said second signal path.