GenRad-Teradyne Programming Services The primary business function and goal of TDI is to be a full service programming service for GenRad/Teradyne users of GR227X, GR228X/TS8X and TS12X testers. To this end, TDI can provide a wide range of services to any company using these test platforms. These services include turn-key programming, upgrades of existing program sets, conversions from 227X to 228X, modeling, training, functional testing on the in-circuit platform, 24 hour support, and telephone consultations. TDI has also handled standalone functional programming. Normally these projects have arisen as another step in the manufacturing process of a UUT for which we had created the in-circuit program. In addition to this combined approach, TDI is always available to quote on functional test projects which are independent of the in-circuit platform.