System interface fault isolator test set

摘要

A system interface fault isolator uses time domain reflectometry test techniques to isolate faults from only one end of a cable, a cable string or component without requiring removal of the cable or component from the system interface. A separate maintenance control unit includes a mass storage means for storing TDR or VSWR signatures of a variety of systems and comparing the signatures with data obtained by the TDR measurement board connected to the cable or component to be tested. VSWR data is obtained by processing the TDR data using software built-in the maintenance control unit. The control unit is programmable to accommodate a variety of different system interfaces, and bit status data can be downloaded directly to the control unit. Two adaptors are also provided, one of which is connected to the control unit to analyze a multi-line digital bus, and the other of which allows differential TDR measurements to be taken by the SI-FI on a MIL-STD-1553 bus.