... General specification8-channel matrix scanner:available Memory 50groups, 100 steps per group, totally 500 stepsVoltage rise-time 0.1s - 999sVoltage fall ... -time 0.1s - 99.9s (only for DC)Test time setting 0.3s - 999sInterfaceStandard RS232,USB,HANDLER,REMOTE I/O ,SCAN ...