Patent ID: 8170821

Claim:
A method of automatically identifying the type of signal transition, suitable for an oscilloscope, the method comprising: establishing a database of signal transition durations; setting a record length according to the database of signal transition durations; capturing a first sampling point and a second sampling point of a test signal according to the record length; and comparing using a processor a voltage difference between the first sampling point and the second sampling point of the test signal with a threshold value so as to identify the type of the test signal; the automatically identifying the type of signal transition wherein the step of identifying the type of the test signal obtaining an absolute value of the voltage difference; and wherein the step of comparing a voltage difference between the first sampling point and the second sampling point of the test signal with a threshold value so as to identify the type of the test signal further comprises: identifying the test signal as a falling signal if the absolute value of the voltage difference is greater than the threshold value and the voltage difference is less than zero.