H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/06 (2006.01) H04B 10/158 (2006.01)
Patent
CA 2348731
A photo receiver branches a data signal obtained by photoelectric conversion and supplies the signal to a signal cutoff detector. Depending on the degree of an autocorrelation of a data signal obtained by an autocorrelation detector, the signal cutoff detector detects abnormality/normality. Depending on a level of a control signal to a VCO contained in a frequency phase- locked loop for use in clock generation, an out-of- synchronization detector makes determination of abnormality/normality. Outputs of both the detectors are ORed at an alarm processor and when at least one of the detectors detects abnormality, the detector generates an alarm.
Honma Yoshinori
Kuriyama Takashi
Matsumoto Yoshihiro
Tachigori Masashi
Corporation Nec
Smart & Biggar
LandOfFree
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