Astek Corporation provides signal integrity tools, cable power test tools. and debug fixtures for IEEE-1394 Data/Stobe (DS) and IEEE-1394b Beta implementations. DS and Beta signaling have drastically different signaling characteristics; therefore, Astek offers specific test tools to meet the requirements of each one. Please remember that most 1394b PHY implementations are bilingual, therefore they support both Data/Strobe and Beta signaling. To insure your implementation meets all requirements both DS and Beta signaling should be tested.