The Series 49 Universal Test Fixture Kit is used with the Series 48 Universal Test System Base. The Test Fixture Kits are quick change and are available in different configurations. Three versions are offered, a blank kit, whereas the end user can configure the interconnect to the Base with their own connector configuration, The 160 point model which uses four (40) pin IDC ribbon cable connectors to interface between the base and the insert kit, and the -I model that incorporates the same 4 block GR2270 style block interface as used on our Series 34 test fixtures. This allows for increased test point count and the use of Industry Standard 2270 style signal, power, and coax blocks.