The Tel Instruments (TIC) TR-220 avionics test equipment is a ramp tester which provides test functionality for TCAS or Traffic and Collision Avoidance Systems, DME or Distance Measuring Equipment and Modes A, C, and S Transponders. The TR-220 avionics test set comes with a leading-edge art design technology and its microprocessor control provides the advantages of possessing basic procedure that would need only short levels of training. Its setup menu enables storage of a range of test parameters to make quick recall of test conditions.