Plug-in modules for high-performance testing on any load board With the invention of the D Series line, Introspect Technology has revolutionized the way product engineers test high-speed digital applications. Our unique plug-in module design allows for high-performance testing on any load board and eliminates the need for cables. Despite the continuous transformation of the test industry in recent years, a growing number of legacy equipment remain in use. The D Series addresses this challenge as it enables multi-Gbps testing on legacy automatic test equipment (ATE). With self-contained power, clocking, and control, the D Series will satisfy your test and measurement needs for complex SerDes interfaces.