초록 ▼

Upon detection of a trigger, such as the exceeding of an error threshold or the direction of a user, a diagnostic link system enters a diagnostic information transmission mode. This diagnostic information transmission mode allows for two modems to exchange diagnostic and/or test information that may

Upon detection of a trigger, such as the exceeding of an error threshold or the direction of a user, a diagnostic link system enters a diagnostic information transmission mode. This diagnostic information transmission mode allows for two modems to exchange diagnostic and/or test information that may not otherwise be exchangeable during normal communication. The diagnostic information transmission mode is initiated by transmitting an initiate diagnostic link mode message to a receiving modem accompanied by a cyclic redundancy check (CRC). The receiving modem determines, based on the CRC, if a robust communications channel is present. If a robust communications channel is present, the two modems can initiate exchange of the diagnostic and/or test information. Otherwise, the transmission power of the transmitting modem is increased and the initiate diagnostic link mode message re-transmitted to the receiving modem until the CRC is determined to be correct.

대표청구항 ▼

Upon detection of a trigger, such as the exceeding of an error threshold or the direction of a user, a diagnostic link system enters a diagnostic information transmission mode. This diagnostic information transmission mode allows for two modems to exchange diagnostic and/or test information that may

Upon detection of a trigger, such as the exceeding of an error threshold or the direction of a user, a diagnostic link system enters a diagnostic information transmission mode. This diagnostic information transmission mode allows for two modems to exchange diagnostic and/or test information that may not otherwise be exchangeable during normal communication. The diagnostic information transmission mode is initiated by transmitting an initiate diagnostic link mode message to a receiving modem accompanied by a cyclic redundancy check (CRC). The receiving modem determines, based on the CRC, if a robust communications channel is present. If a robust communications channel is present, the two modems can initiate exchange of the diagnostic and/or test information. Otherwise, the transmission power of the transmitting modem is increased and the initiate diagnostic link mode message re-transmitted to the receiving modem until the CRC is determined to be correct. rising multiple ring resonators with different optical path lengths, wherein at least part of the multiple ring resonators are optically coupled; a power source for driving the ring laser; an apparatus for measuring a difference in oscillation frequency of laser light; and an apparatus for controlling the power source in accordance with the difference in oscillation frequencies, wherein each of said multiple ring resonators has a portion for propagating laser lights which are counterpropagating and have different oscillation frequencies, wherein a difference in the oscillation frequencics of the laser lights is increased with respect to one rotation direction of the ring laser and is decreased with respect to the other rotation direction of the ring laser. 13. A gyro apparatus according to claim 12, further comprising an apparatus for measuring the difference in oscillation frequencies of laser lights counterpropagating in an optical resonator from a change in a current, a voltage, or impedance of the ring laser. 14. A gyro apparatus according to claim 12, further comprising: a photodetector for simultaneously receiving laser lights counterpropagating in the optical resonator; and an apparatus for measuring the difference in oscillation frequencies of the laser lights from an output of the photodetector. 15. A gyro apparatus according to claim 12, further comprising: an apparatus for measuring the difference in oscillation frequencies of laser lights counterpropagating in the optical resonator from a change in a current, a voltage, or impedance of the ring laser; a photodetector for simultaneously receiving the laser lights counterpropagating in the optical resonator; and an apparatus for measuring the difference in oscillation frequencies of the laser lights from an output of the photodetector. 16. A gyro apparatus according to claim 12, further comprising a frequency-voltage conversion circuit. 17. A gyro apparatus according to claim 12, further comprising a frequency counter. 18. A method for driving a gyro apparatus including a ring laser, comprising the steps of: driving a power source for supplying power to the ring laser; controlling the power source so that a difference in oscillation frequencies of laser lights becomes constant, wherein the ring laser comprises multiple ring resonators with different optical path lengths, wherein at least part of the multiple ring resonators are optically coupled, wherein the laser lights conterpropagating and having different oscillation frequencies are present in each of the ring resonators, wherein a difference in the oscillation frequencies of the laser lights is increased with respect to one rotation direction of the ring lase and is decreased with respect to the other rotation direction of the ring laser. 19. A method for driving a gyro apparatus according to claim 18, wherein the power source supplies an electric power to multiple electrodes of the ring laser. 20. A method for driving a gyro apparatus according to claim 19, wherein the power source supplies an electric power to at least part of multiple electrodes of the ring laser so that the electrodes are electrically independent from each other. 21. A method for detecting a rotation direction of a gyro apparatus including a ring laser, comprising the steps of; driving a power source which supplies power to the ring laser; taking at least one of a signal corresponding to change in a current, a voltage or impedance of the ring laser, an output of a photodetector which simultaneously receives laser lights counterpropagating in an optical resonator, a signal for controlling the power source, and an output current or an output voltage of the power source; using the signal as a difference in the oscillation frequencies of the laser lights of a gyro; and detecting a rotation direction based on the signal, wherein the ring laser comprises multiple ring resonators with different optical path length s, wherein at least part of the multiple ring resonators are optically coupled, wherein laser lights counterpropagating and having different oscillation frequencies are present in each of the ring resonators, wherein the difference in the oscillation frequencies of the laser lights is increased with respect to one rotation direction of the ring laser and is decreased with respect to the other rotation direction of the ring laser. 22. 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