Pulse or digital communications – Repeaters – Testing
Patent
1992-02-13
1994-08-23
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
375 81, 4551642, 4551822, 4551922, H04L 2706
Patent
active
053414020
ABSTRACT:
An automatic frequency control method for use in a receiver mixes a received signal and a local oscillator signal to produce an intermediate frequency signal and converts the intermediate frequency signal to a voltage signal. The voltage signal is converted to digital data which is then compared with a theoretical value, outputting frequency correction data which permits the difference between the digital data and the theoretical value to be minimized. The frequency of the local oscillator signal is controlled according to the frequency correction data so that the intermediate frequency signal becomes the normal frequency.
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Makino Masaaki
Matsushita Naohiro
Chin Stephen
Tokyo Electric Co. Ltd.
Vo Don N.
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