Patent ID: 8339121

Claim:
A signal identifying method for a serial data bus using an oscillograph, the method comprising: communicating with the serial data bus to obtain signals of the serial data bus; controlling the oscillograph to capture the signals through a plurality of communication channels of the oscillograph; triggering the communication channels transmitting the captured signals, and measuring a rise time and a fall time of each of the captured signals; setting a sender terminal (ST) and a receiver terminal (RT) for each of the captured signals according to the following conditions: the rise time of each captured signal in the ST is larger than the rise time of corresponding captured signal in the RT, and the fall time of each captured signal in the ST is larger than the fall time of corresponding captured signal in the RT; setting a plurality of trigger parameters to trigger the oscillograph, and acquiring the captured signals according to the trigger parameters; determining the ST and RT for each of the acquired signals; determining the signal identifying process of the serial data bus is completed when the determined ST of each of the acquired signals is identical to the set ST of the acquired signal and the determined RT of the each of the acquired signals is identical to the set RT of the acquired signal; and generating a report to record the signal identifying result of each of the acquired signals when the signal identifying process is completed, and displaying the report on a display screen of the oscillograph.