Patent ID: 11906329
Assignee: OCTAVA ENGINEERING, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A method for testing an encoder, comprising:
checking for faulty amplitude by measuring both a high state amplitude and a low state amplitude of an encoder signal, and comparing the high state signal amplitude and the low state signal amplitude to a corresponding predefined amplitude range;
checking for signal symmetry by measuring a duty cycle of the encoder signal, and comparing an ON time and an OFF time of the signal to determine if a ratio of the ON time to the OFF time falls within a predefined symmetry threshold;
checking for signal offset by comparing a phase angle of the encoder signal with that of a complementary signal, and determine if a phase difference of the signals falls within a predefined offset threshold; and
checking for signal transmission rate by measuring a rate at which the encoder signal is received, and comparing the measured rate to a predefined rate threshold;
wherein comparing the ON time and the OFF time of the signal includes continually comparing the ON time and the OFF time of the signal to determine if the ratio of the ON time to the OFF time falls within the predefined symmetry threshold.