Title:
RADIO COMMUNICATIONS EQUIPMENT AND ITS RADIO FREQUENCY CORRECTING SYSTEM
Document Type and Number:
Japanese Patent JP3461484
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To secure the frequency stability of radio frequency in radio communications equipment for generating a radio frequency synchronizing with the transmission line frequency of digital data to be transmitted from a cable digital transmission path, etc.
SOLUTION: As for influence of the error of a transmission path frequency blocking the stability of radio carrier frequencies, the error of the transmission line frequency 12b is compared with a highly stable radio reference clock 22a to detect an error frequency 17a by a counter 17 to make the frequency offset of the radio station originating signal of a local oscillator 61, based on this error frequency. Thus, the influence of the error of the transmission line frequency blocking the stability of the radio carrier frequency 63a can be compensated.
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Inventors:
Atsushi Inahashi
Application Number:
JP2000102945A
Publication Date:
October 27, 2003
Filing Date:
April 05, 2000
Export Citation:
Assignee:
Saitama NEC Corporation
International Classes:
H04B1/16; H03J7/02; H03J7/04; H04B1/04; H04L27/00; H04L27/20; H04B7/26; (IPC1-7): H04L27/20; H03J7/02; H04B1/04; H04L27/00
Domestic Patent References:
| JP88983A | ||||
| JP6261082A | ||||
| JP4260254A | ||||
| JP5268282A | ||||
| JP4283149A | ||||
| JP1013256A | ||||
| JP427636U |
Attorney, Agent or Firm:
▲柳▼川 信
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